Ferrari 308 Specialist Gives His Verdict On My Smoke Blowing Engine!
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- Mick from QV in London has over 40 years experience with Ferrari 308s. He examines the InfluEnzo, does a leak-down and compression test and gives his opinion on what the problem withe the V8 engine might be.
Hello from Canada Jack. I believe you are getting close to resolving the Influenzo!! My Father was a technical advisor for General Motors for many years. Although he is almost 90 years old, he told me your problem was likely valve guides many Months ago. When it comes to engine problems, I've never known him to be wrong!! I am a fellow motor enthusiast and throughly enjoy your TH-cam posts. Carry on mate!
The valve guides issue would cause the initial "puff" but the continued swirl of smoke on acceleration does hint at oc rings to me. Good compression is no indication of good oil control rings. The piston has a compression ring and then 1 oil control ring, a spring type ring and a second oil control ring in many cases ( not always) but the compression reading is indication of general boore health and the sealing of the top ring. If the oil control rings get gunked up then they cease to be effective and will allow oil past. It sits on the cylinder wall and gets consumed.
Exactly. Bad oil ring will do this. Even worse, if a scraper ring was put in upside down it will actually pump oil into the cylinder
With old vehicles the frustration is in the obstinate problems, the joy is in solving the ever changing problems. Fixed is a concept you can only apply to much newer things.
Before removing the head, give it a try replacing the valve stem seals. They are cheap (around 5 GBP each) and can be done without removing the head.
good point, just simple rubber o-rings usually?
@@davidstuart4915 No, valve stem seals are actually quite "complex", they typically have a metal casing, teflon or rubber inners, and a spring ring to press the rubber against the stem.
and using thicker hi temp resisting top quality oil - my porsche turbo smoked alarmingly when using lower grade oils that Porsche insisted was correct oil
I have hi hopes for significant improvement just replacing stem seals and upgrading oil to thicker oil that is also rated for Turbo hi performance engines - this could hold off replacement guides until after u get your Maser ;) - a 3200 or 4200 could also be good options around your budget :)
@@davidstuart4915 He is already running 20W50 oil.
@@cav4290 thanks for 1/2 century updat...last time I did it, it was on Ford Anglia and just o-rings!
i see a nice vid coming up, jack fits a new set of oil seals with the engine in situ, bit of a bugger , but we all have faith in you.... [swearbox at the ready]
yup, mick is the same as me, "you can stick that camera up yer arse, i've come to look at the car boyo"
20 yrs ago [ie 22yrs into my career] i buggered up putting a set of valve oil seals on a freshly built infinity engine, used the wrong fitting tool + all were slightly damaged, only lasted for a day before big clouds of oil came out. its easily done, perhaps those seals on the new head were a bit wayward in their fitting.
no, it will never be fixed, but it will be vastly improved... onwards + upwards young man !
Hi Jack, as much as i want you to fix it, it will sadden me if you sell it. I think you deserve to keep it. I also want to see you take it on a summer holiday to Italy, that would be a great series of videos. Once again great work and I love your videos.
It's so tempting to pull the engine do a re ring, bearings, seals gaskets etc.
I know the stem seals are the same as many Renault, Peugeots and Jeeps of similar vintage the bearings and rings are a different story.
I think he figured it out . Valve guides notoriously go bad on aircraft engines all the time, but usually on the exhaust side.
Old Chevy Corvettes from the 60s had the same issues with intake valves, smoke on start up as he said. Redo the valve guides and I think you will be will be a happy Ferrari owner and be thankful it was the rear bank !
Hi Jack, what about making a quick video taken from a car following the 308 as it is driven? You could then assess any oil smoke under different conditions eg on acceleration, over run, applying the throttle after over run etc. Quick and easy to do and bound to stimulate further debate! You know classics are never finished if they are driven, you cross one job off the list and then add a new one. But hopefully the jobs get smaller and less scary. It might even be fun one day! Good luck 🇮🇹
Valve guides for sure. You can do those without taking the head off as well especially since it’s rear facing. You might want to give those 8 barrels a tune up for fuel/air delivery as well since you have some hot plugs. They take a special cfm gauge to tune the throttle so you get all eight sucking about the same.
Brilliant video , as a Gentleman said in the video its a journey not a destination
Everything man made is fixable. If we built it, we can fix it. It comes down to whether it's worth it, and in your case it's definitely worth it mate. It's your bread and butter that helps you maintain your dream job. What can beat that?
I love the channel man. Keep up the great content ♥️♥️
As with any classic car, you always need to leave at least one minor thing not fixed, otherwise something catastrophic will happen.
Being a cynic it would be interesting to see how much a specialist Ferrari dismantler would pay for it, probably more than you might expect. The valve guides would be a very plausible explanation. The 308 has a low compression ratio (8.8:1) so I would not expect high figures from the compression test. Since Mick has no vested interest but has a lot of experience I think it would be foolish not to heed his advice.
This is such a lovely video Jack 😀, your the man keep it up
I do hope you do fix your Ferrari 308 GTS what a pretty car there is another you tuber from Americans who is working on his own Ferrari 308 he has done a few tasteful mods to the engine it is also red
Great update Jack, just sorry I missed Bicester. All in all, it sounds less serious than I thought. You WILL fix it... on the basis that you've checked/replaced the things you have what can be left?
Can we get jacks “yeah” count 😂 hope you get this issue sorted before the end of summer
Just a thought, I wonder what oil is being used? These engines were designed many years ago now and may need a more appropriate oil for the age of the engine design.
Excellent video....I loved the kids comment "I don't think it's broken".. 🤣🤣🤣✌🇬🇧
Get the fuelling sorted
yeah but the even bigger question is how did you get the rights to the Magnum jingle
We should play a game.....how long will be before £10 doesn't cover the minimum 2litres delivery at the pump 😆
Thought you had the valve stems / seals done recently ??
Did you not get both heads rebuilt last time it was apart??... of did they fo the minimum required to get it back together...?
Hang on a mo what was tyrells supposed to be ??
Tbh after it went there it should of been categorically diagnosed
Yes Fix Possible Deep Pockets
older engines usually need a total rebuild , I tried to fix cars with oil. burning ,and the heads did not fix it , older cars the whole engine is most likely worn out ,some older strong Japanese engines you can get away with ring and valve jobs ,but the older Italian cars and American cars are not built that well . I was trained on Alfa s Fiats ,had a shop for 30 years ,we worked on everything , I had better luck on a low mileage used engines then rebuilt engines ,no one can do the same qualityas a factory new engine , unfortunately you can't find a low mileage 308 engine , bite the bullet , it's probably do for main bearings oil pump ,and it may need a bore or sleeve job but even a rebuild is risky, you need to find a older experienced engine builder To do it. or do it your self ,I did my e350 gaskets Valve job timing chains ,bal shaft up date ,it cam out good but had To do the oil pan and timing cover again , it was a nightmare , but it's good now
It shows it’s worth paying a Specilist - tough for a home mechanic
Said it before, and I'll say it again... the 308 is one of the prettiest cars ever made! Absolutely gorgeous! 🥰🥰🥰
As for will it ever be fixed? Yes, I think it will be "fixed", but I don't think it will ever be "finished"!
Correct me if I'm wrong though, but weren't the heads already looked at by QV, and the valves replaced? They didn't notice the valve guides were worn at the time?! 🤔🤔🤔
Can you say it again?
Never before have I seen anyone so cheerfully refuse to accept the reality of a ring problem. I obviously haven't seen the engine in person, but I'm amazed if those compression figures are acceptable for an engine of this type. I was expecting more like 180psi plus which even a basic Ford Crossflow can achieve; the caveat here is that compression testers can vary considerably in their accuracy so who knows for certain? Knackered oil rings can actually improve compression figures by letting oil past (as already alluded to by 156GTA) to help the compression rings seal. Chances are that the entire ring pack/ bore finish is past its best. It is inlet valve guides that cause problems with oil burning - when you lift off the throttle you create a vacuum in the induction tract which sucks oil down the inlet guides, so classic guide issues show as smoke on the overrun. Exhaust guides permanently have gas pressure trying to push oil back up into the head. Bear in mind that worn rings will constantly let oil past and this is the most likely cause of oily plugs, whereas the guides, unless they're absolutely knackered will only pass oil under certain conditions. All that said, the only way to be certain is to strip it. If you DO have knackered guides you need to replace them or sleeve them, because although the valves may settle and seal this usually leads to the valve stem having to bend - and this is the single biggest cause of valve failure I encountered in all my years in motorsport.
@@dizzy2020 The deviation is also important. One cylinder down ~7% isn't that bad.
This is classic advise from your mechanic: puff of smoke on startup = worn valve guides. The oil in the head seeps down past the guides into the cylinder as it sits overnight and burns as you start it up. Easy fix on many engines
I still don’t think this test proves that it’s valve guides that are worn. You can still have good compression results even with worn piston rings and oil control rings as oil around them creates a good seal.
I bought my GTA 10 years ago and drove it down from Manchester to Southampton and after checking the oil level, I had lost 1.5litres🤯. The car had just had a top end rebuild with new valve guides, seals, the whole lot. It was tested by a top Alfa specialist and he found nothing wrong with it. Good compression in all cylinders etc. it had the same issues yours had, blue smoke on start up and on hard acceleration and let off throttle.
So, the heads came off and we removed a piston to investigate further and found the oil control ring was completely worn and had no springiness to it. Removed them all and found exactly the same issue. And on closer inspection, we found that the bores were honed incorrectly and left very course which may add to the excessive oil consumption due to too much oil retention. It looked like maybe the rings were replaced by some eBay special or a cheap aftermarket piston ring kit🤔.
Replaced with genuine piston ring kit from Italy ( oil control riing, scraper ring and top ring) making sure the gaps in the rings were to factory spec. Also rehoned the bores to correct spec.
Low and behold and to this day it doesn’t burn a drop of oil.
So, if you’re taking the front bank head off, I’d remove and inspect a piston and look closely at the bore and rings.
Presume that you will have to take the exhaust manifold off in order to lift the head. Therefore you can then inspect for pooled oil on a cold engine at this point i.e. before lifting the head carbs etc.. Personally I think the smoke on startup points to pooled oil from behind a closed valve which implies valve guides and valve stem oil seal (if fitted).
Very good advice.
@@rhiantaylor3446 it probably is oil seeping through the seals. It depends on what work has been done on his engine. But, if I was removing the head, I’d take a piston out through the top and inspect it. You dont have to remove the crankshaft to do it.
Valve seals failed
Everyone loves the Influenzo so I’m thinking you’re stuck with it Jack which, in the grand scheme of things, is a fantastic problem to have 🚒👍👍
A superb answer to Jack's questions!
Quite surprise when you did the repair on the heads, the valve guides weren't changed. It's a usual job on a 40 year old engine. Usually the exhaust valves don't have seals so they are always the first to leak. Hope it's a quick job with no surprises!
That sounds like a result! Valve guides and stem seals are hugely cheaper and quicker than a full rebuild!
Correct
Yepper
Exactly as Mick says,, valve guide seals have perished. Since the heads are coming off, seats and guides can be inspected properly. If oil control rings were worn or stuck it would smoke constantly plus have low compression.
Don't ever give up Jack, you'll regret any decision to sell it, I know I did with my 328 when I moved to America. There's not many classic Ferrari's that have both the visual appeal and the sound of a 308/328.
Was going to comment the same - if anyone deserves the inevitable value increase this car has coming, it is Jack.
Mick from QV has it! If it was the breather system as I thought, all the plugs would be oily, not just one bank, have a look when you get the EX manifold off and you will probably see a build up of oil burned onto the back of the ex valves!
Phil
I agree with James - it's not broken. It just has startup oil burning. I look forward to watching you address that issue.
Could be steam. My 328 steams vigorously on a cold morning, then stops.(thank God).
Hi Jack, many years ago I had similar issues with a Fiat 850 that had just had the motor rebuilt. After much frustration trying to find the cause we finally discovered that the oil drain holes located in the groove on the piston for the oil control rings were not drilled all of the way through to the inside of the piston. The oil rings couldn't drain correctly which caused a smokey engine and less than perfect performance even though the engine started and ran reasonably well.
Interesting, thank you!!
"Do you think it will ever be fixed?" Might be the wrong question, Jack. I have faith in your tenacity, but the best you are going to do is to get ahead of it for a while and really, that should bring you some degree of satisfaction. In the long run, the Influenzo will achieve entropy.
The Influenzo has nothing but love Jack and it's deserves all the love it's getting from everyone!....... I think you'll fix it bud 🙏👍
Great video as usual. Mick looked like he knew this stuff and seemed very genuine. Asking the public was hilarious. My father who also watches the influenzo series tells me that your series has reassured him that he doesn't want to own a classic ferrari since there seems to be something going wrong after the previous issue is fixed haha but it is a labour of love after all
Before committing to pulling the head off get a set of valve stem seals and pull the valve springs with the head in situ. You can give the valves a wiggle and make a decision on the condition of the guides. If the are badly worn carry on and remove the head, nothing lost. If they feel ok replace the stem seals, happy days. Plenty of videos on YT showing how to do it using air pressure or rope to hold the valves up while you work.
I'd certainly take my stab at guides and stem seals. I've done them on a motorcycle engine. The pooling of oil on initial startup certain points to the top-end and not oil control rings, not saying the rings etc are perfect but guides and seals would certainly be my first port of call after the diagnosis on this video..
If you listen to the experts with years and years of knowledge it will undoubtedly get fixed, being a classic it will always need work…
Of course it can be fixed, ultimately anything can be fixed. It's about cost/benefit and the odds are in your favour. Your man's diagnosis sounded spot on to me, single marque experience is invaluable.
50/50 for me Jack you'll fix it one day, it will then be a great day. The oil start up reminds me of my brother's 1981 Cortina which was valve stem seals back when I was a young.
I so hope this gets sorted
It’s an absolute stunner
Not many motors can turn heads quite like a 308
I think you will get it fixed.
Here is how: Seems like you need to get that rear head repaired.....by that guy. Hopefully he'll be game for the challenge...if nothing is wrong he should help you on plan b. Seems like a good guy and wishing you good luck. Love the car. Keep it if you can.
I have been watching since the purchase, enjoying every moment. Your channel exemplifies the journey that ALL of us 'shade tree mechanics" have been on. You're in the process of becoming an expect in 308 GTS. Frustrations and missteps are the norm. Surrendering to the need for real expertise is inevitable. These master classes in carburetors, bottom end tests and such will serve you a lifetime. The journey builds character AND is entertaining. OFCOURSE you will fix her, and once sorted love her all the more for the journey.
Well said !
Where there is passion, there are always life lessons.
I recall in an earlier video, that both heads had been refurbished with new valve guides when the cracked head was replaced. Maybe a question to who did the valve guide work.
My thoughts exactly, in a previous episode Jack said he'd been in contact with guys who did the cylinder heads and they said it's definitely not them that's the issue. The car didn't have this problem until the heads were done.
It does seem odd to me that even if it is the guides/seals, they've not only gone on one bank, but, as far as I gather, on every cylinder of that one bank.
Is that normal - or a sign of work done on all the cylinders/all the valves of that bank?
@@villiamo3861 if the guide to valve stem clearance is wrong then it will affect all of the valves on that cylinder head.
What's it breathing like? - Presumably there's an engine breather, up to the inlet manifold?
Love this car. Doesn’t want to be fixed but we would all still keep trying because . . It’s a great Ferrari.
Good grief Mick sounds really happy in his work 😂😂
Sadly soon all combustion cars including classics will be banned from public streets in entire EU and Scandinavia :-(
In Germany the Green Peoples Party gave order to shorten fuel supply from 2025
on by reducing all conventional fuel stations to only one state operated central gas station per city or county. Now they want to slow down all the gas station pumps from 20 litre per minute to 2 litre per minute...From 2027 on in the EU certain car spare parts will be banned too....as exhaust systems, turbo chargers and even some engine and gearbox oils...California and New York will do the same from 2027 on.... So no investments should be done in oil burning cars any longer....They even created a new kind of crime here, called emissions and smoke crime.!!!! (BABBVEN LAWS AND TEBBVEN ORDERS)
Nice to hear that my initial diagnosis of valve stem seals was on target, quote from Ray " valve guides or stem seals". Ferrari's never are "fixed", too finicky and fragile, bit like Lotus racing cars. Nice car, although my favourite Ferrari was the Testarossa, nearly bought one for around £25K in the 1990's but decided against it when at the time you could buy half a dozen 150bhp Triumph TR6's in similar condition for the same money. Also the profit on restoring the six TR6's would be over double the profit of restoring the Testarossa!
Hopefully progress Jack, so onto the list of options & ticking them off again. You will get there with your patience & determination!
Will it ever be fixed?, of course for a time, then something else, usually niggly will be required, it's just the nature of these cars! All the best!
She’s achingly beautiful. Please sell everything and fix her. 😀
Jack, why don't you get Iain Tyrrell to figure out the problem? That would end your headaches, time & money. Wham Bam! Problem solved! If Tyrrell says, "Take the engine out", Then you do it. Don't hesitate! Just friggin' do it. Just follow Tyrrell's advice.
I have had 2, a ‘75 GT4 and a ‘79 GTS…neither was ever “fixed” during nearly 30 years of ownership between the two. But that didn’t keep me from enjoying them. Good luck.
Valve guide seals on the ford CVH blocks were a problem. Especially the XR3i. Then they modified the seal to a 1 piece moulded jobby. This cured the smoke. I must have changed dozens over the years.
Hello again from Belgium!
This might not be a popular opinion, but as soon as I saw the start up in the garage, along with the beautiful idling sounds, and the little cloud of smoke, I wouldn’t even bother anymore. I like the fact it has a bit of a puff, just as in the old days when racing cars start up at the racing track providing the ricinus smell. Lovely!
In fact, the engine is quite healthy. Wouldn’t you leave it just as it is?
Thanks and cheers from Belgium 🇧🇪
If your plugs are Sooty, give them a Sweep. If not, Sue 😂 Only people over 40 will get that joke 😁
Only people over 40 will realise you are the original Joker.......
😆😆😆😆
GOT to say ... when you have driven it down the road with the camera pointing rearwards ,,, you could always see a blue haze of smoke ,,, always yes start up is worse , but you have a blue haze when you drive look at your rear camera shots
It's a classic Ferrari how can it ever get fixed 100%?? You just have to roll with it and enjoy the ups and down along the way. Always a joy to see this car.
This video shows the value of expertise in the field. Mick is experienced, has the required equipment to give an accurate diagnosis. You can pull the head off knowing what it is you are looking for. I have no doubt you will be able to tell the difference between the worn guides and the better ones. I look forward to the video when it arrives showing what you find.
Experience is key! I personally have been wrenching and building engines for myself (and with a few friends) for 40+ years and part of my professional career as a Mechanical Engineer involved 8 years as a Warranty Engineer for the US operation of a German Diesel engine manufacturer (guess which one). Forensic Failure Analysis. Doing it all day five (sometimes six) days a week you see all kinds of strange things. Does that engine use valve stem seals? If so, I'd lean toward the seals being the problem rather than the guides, although if the guides are worn the seals will wear prematurely too.
My all time favourite sports car since the days of Magnum p.i.Good luck with finding the gremlins!
Not knowing this particular engine, I had a similar problem where pressure was building up due to a blocked valve in the breather system…..rebuilt engine and put on a new head before we figured it out.
Worth checking pressure in the crankcase at various times?
Called it once it had excellent compression and very little leak down. Valve seals no longer pliable.
Have you looked at the valve stem seals? I've had that problem before on a V8.
It's a fantastic car Jack and all of us on here love watching the updates.
Personally I'd pull the engine and build it. Would make for some interesting content along the way.
Jack I have to say…… if this is ever fixed…. And I hope it is🤞🏽…… I think when you are driving it with everything
Fixed….. you’ll be waiting for something to go wrong….. I don’t think you’ll be really happy….. due to the time an money you’ve spent on it……. 😵💫
Great vid as ever Jack. Based on my 7 year journey to get my 70 Boss 302 Mustang “fixed” there will indeed be moments that the 308 is fixed until the next issue inevitably appears. But the key to staying with it is to treat each new issue as an inevitability and a project rather than a problem. Martin
Did Iain Tyrrell have a view on the smoking this time a year ago? I can't see it mentioned in that vid.
Just wondering if some oil dyes might help you narrow things down in terms of location. Also if it is just on startup turning over without spark with compression multiple times and building up oil pressure might allow you to observe the oil leak unburnt. I would also be tempted to try and track down an oil passage flow drawing to get a better understanding of the oil flow around the engine in case of pressure difference depending on bank for example
Great video as always Jack. Loved the “crucial question” - I’ve got every faith in you!
Jacks hilarious. Lovely car. I’ve said it before: my Mum had a W reg 308 GTB in 1983 and Dad told her to swap it for a 911 SC Targa because he was warned the Ferrari would always go wrong and cost a fortune to run.. and the Porsche wouldn’t go wrong. She kept the Porsche from 1984 till 2014. Happy memories. RIP Dad. X
Hi Jack, other test: brake strongly on the engine while driving e.g. close(d) throttle from high revs (create vacuum in inlet track, hence suck oil via valve guides) and when revs are low accelerate again. The person behind should see a puff of (oily) air coming from the exhaust the moment you open throttle again. Then easiest and least expensive to try is to change the oil seals (seals valve stem versus guide, they become hard over years of non running) Part-number 12, page 27 of July 1978 parts manual. Cheers JB
Yep ,had that myself.good advice👍
Hello Jack - I know you're feed up of me mentioning the (possibly blocked) oil drain from the swirl pot oil separator in the breather system.
Please do yourself a favour and undertake a quick test!
Remove the breather pipe(s) so they don't feed into the intake system and place them into an oil catch tank in the engine bay (a one litre metal can will be fine).
Block off the old breather feed into the intake system.
Put a new set of plugs in and go for a run.
If the plugs remain un-oiled - guess what (and don't get confused if there isn't oil in the catch tank as not having a draw on it from the intake might avoid oil pull over).
If the exhaust valve seals were your only problem, ok you'd get smoke on start up (from the open exhaust valves letting oil into their cylinders), but after that the engine would run clean as the exhaust gasses wouldn't enable the oil to get into the cylinder while running (and the plugs would clean up during your drive).
It's a relatively simple test esp, compared to what you're about to embark on!
This is sooo simple to try. I've wondered about crankcase ventilation concerns.
I had a 246 and all the experts take a look and a friend of mine had a Peugeot 405 and the main dealer told him to use cheap oil and that cured the problem but he wasn't making TH-cam videos
I think this car and your efforts have become a national treasure now. You really need to keep this car.
Yes you will eventually fix it, but of course some other faults will come along to keep the channel fixated on the Influenzo progress. Problem children are always problem children, but you can’t stop loving them.
Valve Stem Seals, Oil Control rings or PCV System are your three most likely suspects
Mick did some work in my old 308GTS qv back in 1993-5… I think they were then still in Park Royal, west London.
A gumed up PCV will make a good engine smoke
Of course it’ll be fixed, Jack. Of course it will.
Real soon now...
There is a simple test to narrow down where the oil burning issue is. If there is smoke under hard acceleration it is likely to be piston rings. Then try this, in third gear, accelerate hard and rev it to say 6000 rpm, lift off suddenly for about 2 or 3 seconds then floor it. If there is a plume of smoke after that, it's valve guides or stem seals, or both. What is strange is why it's only one bank burning oil, and why all 4 plugs.
We have the old saying.
A spark plug never lies.
Just a great video. Although I'm here in Boston I hereby submit my vote: "Will it ever be fixed?" Not bloody likely, at least anytime soon. Is it worth you staying with it? For entertainment value alone - a resounding "Yes!". The car is drop-dead gorgeous and your search for a solution to its less-than-perfect performance is unfailingly entertaining. Well done Jack!
You will fix the InfluEnzo and it is wonderful. I wish I bought the one I saw back in 2013... now they are to expensive. Don't sell the InfluEnzo, it will just get more expensive. :)
If we can land on the moon you can fix the InfluEnzo :)
If we landed on the Moon multiple times, we can also fix the Influenza multiple times!
Well if the InfluEnzo does eventually get moved on, I'd quite like to see something like a 308 GT4 or Mondial QV 3.2 or 3.4T come in as a replacement for the channel. Failing that something like Maserati 4200GT Gransport V8.
You may get it "Fixed" but the question is, how long it stays "Fixed" !!😤
It's not really a big issue a bit of blue smoke like that.... Common across most ICE engines in general... I remember changing valve stem oil seals on the old Ford cvh's 30 years ago.... A sight simpler than the ferrari... Grant3d😜
The Car Wizard in the States has been posting videos of his 308 QV troubles. He fixed all the leaks ( 15 ) but still smokes and discovered that the ECU is bad and the car cannot be properly tuned as the OEM of the unit closed up shop for good due to COVID..
Even if you can buy a Ferrari or other exotic car at an affordable price they still are exotic cars and maintenance is expensive. I owned a BMW E30 M-3 that I absolutely loved. It cost me a small fortune to maintain. Valves had to be adjusted every 8,000 miles at a cost of $800-1000 a pop. That was the reason I sold her,and I kick myself for selling her because they are going for such a high price today. Live and learn.
Ten pounds is what... 5 liters or a 1 1/3 US gallon. If its anything like my carb 308, its not getting very far at all on that much gas unless driven like a grandma... I would get around 15 miles probably ;-)
We all know the reality is GO ELECTRIC and have a better driving experience, it will last for many years beyond OIL BURNERS.
Quit faffing about and do it right. Send both heads out to a Quality rebuilder with lots of experience in Ferrari heads. As Mick said It's valve guides/seals. Oil CANNOT leak UP past the rings overnight and cause smoking on startup. It has to leak DOWN past the valve guide seals BUT if the guides are worn just replacing the seals is futile! Write off what you spent before and don't send the heads back to the shop you used before, why give them a second chance to screw it up worse. They may make the unusable.