As much as I sympathise with the pain you’re going through with this, I equally appreciate you taking the time to blog the recovery process. It’s very interesting to see a tear down and explanation of what went wrong, what to look for etc.
While the head is off I would check all the inlet valves as well. Especially as you found some bent exhaust valves in cylinders that passed the leak down test.
That engine has had valve float, when you make tuning changes and raise the rpm you should do the valve springs too. If left unchecked the valve float can cause the collets to pop out and drop the valve- that's proper carnage.
"It never ever stops.. Oh yeah we're gonna stop for some food now actually" Lol love it Joe. All the small bits of footage make this and all your content such an easy watch; other cars, what's going on around you, etc. Keep up the great work!
Hi Joe , I’m no technition but I’m canny in the building trade, I wouldn trust the chuck in the drill to see if valves are bent, not all chucks are true , if you put a new valve in drill and done same I think it would show it bent, hope this helps, good luck
I think the reason the leak down test did not show leakage in all of the cylinders is due to the one valve being much more bent than the others, so the clamping force of the spring was not able to overcome it. In the case of the other cylinders, possibly they did not leak because the bends weren't so severe that the clamping force of the valve springs weren't able to overcome them. All of the intake and exhaust valves need to be measured with a dial indicator to see if they are bent. I'd say even if you have to replace all of the intake and exhaust valves, you got away with much less damage than the worst-case. Of course, you will have to take care of the crank hub as well.
Do you think the valve springs are strong enough to pull the shanks out of line with the guides ? I just can’t see them being strong enough to effectively seat a valve enough to get zero leak.
@@bowie3000 If they are only slightly bent, I think the springs will force them into alignment enough to reduce the leakage so it's not noticeable as noticeable as on the the other cylinder where the valves were very bent.
You didn't even gloss over the fact that the pistons have markings from hitting the exhaust valves? 5:19 I guess it's obvious but they seemed suprised that all valves were bent.
Take a look at the tops of the pistons and you can see the marks from the exhaust valves making contact. You're looking a set of exhaust valves. It could be MUCH MUCH worse. Wondering what the piece of stray metal is...
You need to pull the inlets out and measure the runout of the Seat on the valve as they may be bent a small amount that’s not visible to naked eye. If they are bent even a very small amount they will fatigue prematurely
Why would only the exhaust valves be damaged and the inlets remain undamaged? Also I wonder if you would have been less likely to have missed the gear had you still had the original gear selector etc etc fitted??
Assume the head is being sent off for new valve stems? I was a bit shocked to see there is no work bench to be honest, working on the floor / cardboard just didn’t seem right in a reputable place such as this!
Ooffff mate, seems to have been a massive hit in the rotating assembly. If this has happened you should also have the rest checked, pistons, rods, cranckshaft, main bearings etc, pretty sure the guys at swift have this in the picture. Just a tip after my recent 48 error codes indicating a fried ecu which was not fried at all: Replace the valvelift actuator and the asociated excentric axle as a precaution since you're at it anyway. They could very well be the reason why the S55 can be this typical rough at idling/rolling away with a cold engine. Had mine failing at 15.000km (suddenly with a ton of error messages and one month (!) of trial and error in finding the source of one of the power circuits of the ECO only putting out 1V i/o 5V) after a failed cranckhub at 9.000km. Me not really happy with the S55 although after it had been repaired, it was oompf all the way to be honest haha. Good luck with the repairs, great content !!
If you’re gonna blow your brains out. It’s comforting to know you have a brilliant cranial surgeon to put you back together 🙌 How good are these guys. They transformed my M5 in a few hours. Not by bolting stuff on but just being experts. If you have an M Car >>> 💯
Shocker about the exhaust valves, will you be checking the inlet valves as well? If that’s all it is then it is a bit of a relief to see! Fingers crossed and good luck 👍🏻
Mybe Switching to a dct Box Would be Better For Track Driving ?I Know Misha Sold there GR Yaris Due to Valve Train Damage Due to Over Rev Plus Clio they had ,They Wont use Manual cars For Paying Customers Due To The Costs.DCT Wont Let you Over REV As Easily as a Manual Box. Saying That i Had a Brand New Bmw M135i I Bought From Tony at Berry Bmw and the Auto Box Only Lasted 3 months Before i Had to Take it Back and Get Another New Car🙂So Just Buy What You Like Best.
In a way that's admitting you're crap at driving and need training wheels. We didn't do this in old days either you sink or swim. I understand where you're coming from though
Your oil looks very clean Joe you clearly change it more often. I was expecting to see cylinder scoring, broken pieces of piston, valves etc, but from the camera lens end it’s not looking that bad Yet!. 🤫🙉🙈🙊👀🤞
The valve test is not accurate . There may very well be a problem with the screwdriver itself And it is certainly not accurate. I am a carpenter and know that this tool is not accurate for measurements of this type Anyway, good luck!!!
Im reading though people's comments and people are clearly more knowledgeable than myself on the subject so ill ask this question. As far as a blog this is a great watch but economically, exploration and rebuild or just find a replacement engine?
I’ve been through this. Replacement engine is the way to go. Russ may be a master, but the problem with a rebuild is that it’s a rebuild. Mine went 2,500 miles and failed again - due to faulty shop work. Wasn’t until I bought a new motor that my problems were solved. Many people will tell you NOT to open these engines. I second that. It’s faster and cheaper - and there’s a ton of S55’s out there.
@MarioBehr interesting, I think I'd be more inclined to go for a new engine saying that this video does make for really good content on like an autopsy, just seeing exactly what went wrong to cause the failure.
Had the same thing happen on a little more grown up engine lol, modular V8 dohc and 32 valves, in all seriousness though we decided to replace all the valves as a few bent, I'd say swap them out I'm sure you're not short of a quid, better long term and cheap insurance mate. Best of luck with it.
Yeah, to echo nathobean8582, it is great to see this tear down and diagnostic review up close. It is great you nailed down the damage (i.e., the fix), so you can get this beauty back on track!
Bit of a worry if the valves have hit the pistons its possible the top piston ring grooves could have been slightly crushed trapping the rings that need to be free to expand and contract with engine temp. I have seen it. Good thing to keep the valves in order is to mark front on a stiff piece of card pierce and push the valves through in order. Certainly different interesting content coming out of some bad luck. Hope all goes well. 👍👍👍
Inlets wouldn’t be fully open until the pistons are well on their way down the bore and would be shut when the pistons are on their way back up on either compression or exhaust stroke. So even with valve bounce it wouldn’t be contacting inlets.
Very informative video on engine parts that I have no clue about really but after watching this series of films and a certain other TH-camr that rebuilds cars in the UK & Us I am beginning to learn at least the names of parts that I have heard about in the past but had no idea where the fitted and what they did so thanks.
It could have been a lot worse Joe. We all need a Russ in our life. I'm sure he will have the M2 back on the road soon. That piece is a mystery though.
At what point do you call it and say that the motor is done? If the valves are bent, then there should be more malice in that combustion palace lurking in the bottom end
At this point, it would be best and smart to rebuild the entire engine based purely on the fact that the entire motor was exposed to stress that caused it to jump time. However, his wallet is going to disagree with me. 😂
Over rev resulted in valve bounce that bent them or did they hit piston as suggested? Would be curious to know what revs peaked at if that’s available heard that over rev events can be stored in the computer.
@@JoeAchilles1 On the plus side You've got some interesting footage of what could happen to the engine as I'm sure many others will appreciate! Will you be getting the new M2 or will you wait for a comp or even more tempting a CS ??
Not sure if there's a medal or knighthood for services to performance cars / service, but if there are then Russ needs it. Amd a good nights sleep. Super patient and painstakingly attentive.
He runs a motorsport garage, it’s literally his job and how he earns his living 🤷♂️ Joe has openly taken us through the entire episode of what happened to the car admitting that it was entirely his own fault. He is now videoing and logging the entire strip down, diagnosis and rebuild. This eventually could end up costing him several thousands of pounds. So I don’t think he will be too bothered about somebody criticising his driving ability ….. just saying.
couldn't have happened to a more humble guy- so sad for your engine loss/disaster. lmao. Try taking some shifting lessons in the future. haha better luck next time mayte
No money shift from a DTC. Everyone keeps on about the ‘involvement’ of a manual…. Didn’t realise they meant getting involved in engine strip downs and rebuilds 🤦♂️
As much as I sympathise with the pain you’re going through with this, I equally appreciate you taking the time to blog the recovery process. It’s very interesting to see a tear down and explanation of what went wrong, what to look for etc.
While the head is off I would check all the inlet valves as well. Especially as you found some bent exhaust valves in cylinders that passed the leak down test.
I know nothing about engines, but Russ and his team are showing unbelievable commitment. That’s proper old school work ethic right there.
That engine has had valve float, when you make tuning changes and raise the rpm you should do the valve springs too. If left unchecked the valve float can cause the collets to pop out and drop the valve- that's proper carnage.
"It never ever stops.. Oh yeah we're gonna stop for some food now actually" Lol love it Joe. All the small bits of footage make this and all your content such an easy watch; other cars, what's going on around you, etc. Keep up the great work!
1000 hp build here we go!
It's the only way 😂
Fascinating tear down videos. Unlucky and clear that the over rpm incited timing slip and the rest of what has unfolded, clear contact been made
Hi Joe , I’m no technition but I’m canny in the building trade, I wouldn trust the chuck in the drill to see if valves are bent, not all chucks are true , if you put a new valve in drill and done same I think it would show it bent, hope this helps, good luck
Seriously. Smells a little funny from here. My bimmer tech says s55 is non interference.
@@calcio13 S55 if deffo a interference engine, you may need to look for a new bummer tech 😅
I was thinking the same thing.
@@calcio13he’s no bimmer tech then…. Very few engines are none inference, never mind a S55…..
Really enjoying this new aspect of your videos mate. Curious to see where it goes!
Dedicated hardworking engine expert👍👍👍👍👍
I think the reason the leak down test did not show leakage in all of the cylinders is due to the one valve being much more bent than the others, so the clamping force of the spring was not able to overcome it. In the case of the other cylinders, possibly they did not leak because the bends weren't so severe that the clamping force of the valve springs weren't able to overcome them. All of the intake and exhaust valves need to be measured with a dial indicator to see if they are bent. I'd say even if you have to replace all of the intake and exhaust valves, you got away with much less damage than the worst-case. Of course, you will have to take care of the crank hub as well.
Do you think the valve springs are strong enough to pull the shanks out of line with the guides ? I just can’t see them being strong enough to effectively seat a valve enough to get zero leak.
@@bowie3000 If they are only slightly bent, I think the springs will force them into alignment enough to reduce the leakage so it's not noticeable as noticeable as on the the other cylinder where the valves were very bent.
I like this different content (rebuilds, trips, etc.)
Cant wait for the next video.
Love the passion you have for the m2 comp
You didn't even gloss over the fact that the pistons have markings from hitting the exhaust valves? 5:19 I guess it's obvious but they seemed suprised that all valves were bent.
Yep was the first think I saw when they looked at pistons
Came here to post this.
Love the two rear end cars at the beggining, looks cool!
Luckily Joe you appear to doing well for yourself because l wouldn’t want the bill that’s coming your way !!!!!! Keep up the great work 👏👏
Timely video,I was up until 2.30 this morning changing the valve stem seals on my 320i in my garage,nice time to work on a car in my opinion.
are you done updating us on this rebuild? its been two months
I am also looking forward to the next chapter in this story.
Your in safe hands. What a team. Great video
Please change both chains and guides when reassembling, changing the timing chain you gonna have to change the stretch crank bolt as well
Regards
Please tell me more about the 325tds touring, that’s what I daily drive😍😍
Take a look at the tops of the pistons and you can see the marks from the exhaust valves making contact. You're looking a set of exhaust valves. It could be MUCH MUCH worse. Wondering what the piece of stray metal is...
You need to pull the inlets out and measure the runout of the Seat on the valve as they may be bent a small amount that’s not visible to naked eye. If they are bent even a very small amount they will fatigue prematurely
That engine is shot anyway now. Not many options but to rebuild though as a used engine likely worse.
So how is the m2 coming along? Had my m4's crank hub done today
Why would only the exhaust valves be damaged and the inlets remain undamaged?
Also I wonder if you would have been less likely to have missed the gear had you still had the original gear selector etc etc fitted??
Yeah I thought the same about the shifter. I prefer manual but if I was going to use a car a lot on track I’d go for auto.
joe make sure to swap out all the valves,and get a proper crank hub and youre good
So far, you seem lucky Joe, easily done pal. 👍🇬🇧
Good news. Replace all the valves and your good to go.
@0:20 what are the wheels on that car on the top ramp please ?? (the non BBS RC style ones)
Protrack One
@@f65054 thank you :)
When I saw the shiny crescent moons on each piston, it indicated the exhaust valves had come into contact with something they shouldn't have.
Wondering if it was just the drill chuck that was wobbling than all of the valves being bent?
Probably a repost but @1:13 that's a Nürburgring map tattoo isn't it? Ha nice:) Cheers Robin, fellow M2 Comp driver:)
Awesome Content Joe…
How is the M2 Comp doing Joe!!?
What great service. 😊
Love
Great content! 👍
Argh , 🤞Rus can work his magic and you are back up and running soon , GL
Whats happened with this? Has it been fixed now?
Please explain how valves got bent. Who is to blame? How to avoid?
Watch the previous videos
Assume the head is being sent off for new valve stems?
I was a bit shocked to see there is no work bench to be honest, working on the floor / cardboard just didn’t seem right in a reputable place such as this!
Eating on the floor also,all you need is a couple of trestles,et voilà une table. Not rocket science is it. 😂
Good interesting video Joe thanks
Whilst it's in bits you going to get any bits uprated?
Can’t wait to see what’s planned.
Any more clues as to where that stray piece of metal found in the cylinder came from?
Valves have been kissing the pistons never increase rev limit when tuning !
Proper bend. 😨👍🇬🇧
5 months since the last update...is this one dead?
Ooffff mate, seems to have been a massive hit in the rotating assembly. If this has happened you should also have the rest checked, pistons, rods, cranckshaft, main bearings etc, pretty sure the guys at swift have this in the picture. Just a tip after my recent 48 error codes indicating a fried ecu which was not fried at all: Replace the valvelift actuator and the asociated excentric axle as a precaution since you're at it anyway. They could very well be the reason why the S55 can be this typical rough at idling/rolling away with a cold engine. Had mine failing at 15.000km (suddenly with a ton of error messages and one month (!) of trial and error in finding the source of one of the power circuits of the ECO only putting out 1V i/o 5V) after a failed cranckhub at 9.000km. Me not really happy with the S55 although after it had been repaired, it was oompf all the way to be honest haha. Good luck with the repairs, great content !!
I’ve fallen out with the S55, seen too many fail and never be quite right again when patched up.
...how do valves bend?
If you’re gonna blow your brains out. It’s comforting to know you have a brilliant cranial surgeon to put you back together 🙌 How good are these guys. They transformed my M5 in a few hours. Not by bolting stuff on but just being experts. If you have an M Car >>> 💯
You spun the hub no doubt you should upgrade it while you are at it being the extra power and that you track it.
So whats happened. Timing jumped?
or valve "float" due to too high rpm.
At this point it’s like 700k just in labor
Shocker about the exhaust valves, will you be checking the inlet valves as well? If that’s all it is then it is a bit of a relief to see! Fingers crossed and good luck 👍🏻
So far the damage has been fairly small, but the cost is a whole other matter on these cars. Good luck getting it sorted.
Mybe Switching to a dct Box Would be Better For Track Driving ?I Know Misha Sold there GR Yaris Due to Valve Train Damage Due to Over Rev Plus Clio they had ,They Wont use Manual cars For Paying Customers Due To The Costs.DCT Wont Let you Over REV As Easily as a Manual Box.
Saying That i Had a Brand New Bmw M135i I Bought From Tony at Berry Bmw and the Auto Box Only Lasted 3 months Before i Had to Take it Back and Get Another New Car🙂So Just Buy What You Like Best.
In a way that's admitting you're crap at driving and need training wheels.
We didn't do this in old days either you sink or swim. I understand where you're coming from though
Your oil looks very clean Joe you clearly change it more often. I was expecting to see cylinder scoring, broken pieces of piston, valves etc, but from the camera lens end it’s not looking that bad Yet!. 🤫🙉🙈🙊👀🤞
The valve test is not accurate .
There may very well be a problem with the screwdriver itself
And it is certainly not accurate.
I am a carpenter and know that this tool is not accurate for measurements of this type
Anyway, good luck!!!
How did the valves bend, did the timing chain skip a tooth?
Overrev
@@Nakinakpgm I get it - valve float. Thanks
the crank hub on the S55 engines are know to slip causing the timing to go out. the overrev from the missed gear would have slipped the crank hub.
Even without small crank hub slip an over rev can still cause valve contact due to float
Did this engine suffer an over-rev somehow ?
Yes on track
Im reading though people's comments and people are clearly more knowledgeable than myself on the subject so ill ask this question.
As far as a blog this is a great watch but economically, exploration and rebuild or just find a replacement engine?
I’ve been through this. Replacement engine is the way to go. Russ may be a master, but the problem with a rebuild is that it’s a rebuild. Mine went 2,500 miles and failed again - due to faulty shop work. Wasn’t until I bought a new motor that my problems were solved. Many people will tell you NOT to open these engines. I second that. It’s faster and cheaper - and there’s a ton of S55’s out there.
@MarioBehr interesting, I think I'd be more inclined to go for a new engine saying that this video does make for really good content on like an autopsy, just seeing exactly what went wrong to cause the failure.
Well that's not what I'd hoped
I believe someone planted that metallic bit in the cylinder
Feel your pain, did a similar thing in my old gte 16v at santa pod years ago, went from 3rd to second whilst racing an rs turbo 😢
Had the same thing happen on a little more grown up engine lol, modular V8 dohc and 32 valves, in all seriousness though we decided to replace all the valves as a few bent, I'd say swap them out I'm sure you're not short of a quid, better long term and cheap insurance mate. Best of luck with it.
Yeah, to echo nathobean8582, it is great to see this tear down and diagnostic review up close. It is great you nailed down the damage (i.e., the fix), so you can get this beauty back on track!
Bit of a worry if the valves have hit the pistons its possible the top piston ring grooves could have been slightly crushed trapping the rings that need to be free to expand and contract with engine temp. I have seen it. Good thing to keep the valves in order is to mark front on a stiff piece of card pierce and push the valves through in order. Certainly different interesting content coming out of some bad luck. Hope all goes well. 👍👍👍
That doesn’t happen. The valves will bend before that happens.
@@Ratcher
Let's hope so.
Crazy find being every single one. Will you replace with the same genuine ones or can you go for an uprated option?
What's the reason for not doing the intake valves too?
Inlets wouldn’t be fully open until the pistons are well on their way down the bore and would be shut when the pistons are on their way back up on either compression or exhaust stroke. So even with valve bounce it wouldn’t be contacting inlets.
@nickg24 not if the crank was spun, timing off, and alllllll of the exhaust valves got hit. I reckon they’ve put on a good show here
So what was the cause of the damage? Money shift? Anyone know?
Watch the video series
@@JoeAchilles1 on it now!
Wow makes you realise how complicated an engine is. To think Koenigsegg’s dark mater Motor produces 800bhp 900lbft only 40kg!
Very informative video on engine parts that I have no clue about really but after watching this series of films and a certain other TH-camr that rebuilds cars in the UK & Us I am beginning to learn at least the names of parts that I have heard about in the past but had no idea where the fitted and what they did so thanks.
Cheers John, me too!
@@JoeAchilles1 When can we expect to see part 4?
Crank bearings ? They rarely survive a money downshift
Interesting, just a bit concerning there must be more damage in there somewhere?
Hats off to Ross...looking forward to solving the mystery metal piece.
That's rough!
It could have been a lot worse Joe. We all need a Russ in our life. I'm sure he will have the M2 back on the road soon. That piece is a mystery though.
The older car, is much better looking.
True, but the newer car wouldn’t have spun its crank hub.
Joe, where do you get the decals, I pity the fuel, I need one for my new bike (Yamaha MT-10 ) she's a bit thirsty 😅😅
At what point do you call it and say that the motor is done? If the valves are bent, then there should be more malice in that combustion palace lurking in the bottom end
Not necessarily, valves are far more delicate than rods or crank
@@scottbrown4142 true, but the foil in the #5 would suggest bearing issues.
@@fuller9xon top of a piston, from a bearing? huh?
At this point, it would be best and smart to rebuild the entire engine based purely on the fact that the entire motor was exposed to stress that caused it to jump time. However, his wallet is going to disagree with me. 😂
@@fuller9x how would bearing material end up from the oil system into a cylinder… no sense
Seriously, isn’t the s55 non interference???
No.
Owie good luck
Sounds like you owe a few pints.
You're moneyshift looked pretty bad so this is not surprising actually. Hopefully most everything can be reused except the valves.
Over rev resulted in valve bounce that bent them or did they hit piston as suggested? Would be curious to know what revs peaked at if that’s available heard that over rev events can be stored in the computer.
New cars and new rebuilding. You wouldn't get that with a 1970's British motor .........
im sure if you money shifted a 1970 motor it would have gone pop also
Youd think a modern BM engine would have a safe gaurrd to protect against user error!? 😂
Hilarious!
@@JoeAchilles1 On the plus side You've got some interesting footage of what could happen to the engine as I'm sure many others will appreciate!
Will you be getting the new M2 or will you wait for a comp or even more tempting a CS ??
Not sure if there's a medal or knighthood for services to performance cars / service, but if there are then Russ needs it. Amd a good nights sleep. Super patient and painstakingly attentive.
He runs a motorsport garage, it’s literally his job and how he earns his living 🤷♂️
Joe has openly taken us through the entire episode of what happened to the car admitting that it was entirely his own fault. He is now videoing and logging the entire strip down, diagnosis and rebuild. This eventually could end up costing him several thousands of pounds. So I don’t think he will be too bothered about somebody criticising his driving ability ….. just saying.
No problem at all David. I thought you needed some help and it looks like I was correct, bye now.
enjoyed this series, hopefully not too expensive to repair
🍀Good Luck 🍀
I think you definitely dodged a bullet there Joe,could of been far worse.
25 kilo head suspended with a cardboard box - am I missing something as that does not seem like a good idea
couldn't have happened to a more humble guy- so sad for your engine loss/disaster. lmao. Try taking some shifting lessons in the future. haha better luck next time mayte
Better than expected, are you doing a crack test?
❤
Ouch, looks like a five-figure bill.
this wouldn't have happened if u had a DCT! leave the manuals to the racers who dont have to pay for their misshifts out their own pocket!
Yeah totally agree.
No money shift from a DTC. Everyone keeps on about the ‘involvement’ of a manual…. Didn’t realise they meant getting involved in engine strip downs and rebuilds 🤦♂️
😢