LOTUS ENGINE UPDATE - WHY YOU SHOULD ALWAYS CHECK TWICE!
ฝัง
- เผยแพร่เมื่อ 9 ก.พ. 2025
- Today Isaac runs us through a workshop update whilst Lee takes some time off. We discover a misprint in the autodata that could throw you off, Show progress on the lotus engine and explain the progress with the figaro engines and the BDA(E).
Barum Engines Shop: www.barumengin...
Barum Engines Homepage: Barumenginesltd.com
Core plugs are there for manufacture, nothing to do with freeze protection.
Back when was young sixty odd years back people still drained their cooling systems in cold weather, core plugs may well have been part of the manufacturing process but they also served as frost protection these days that should be pretty much irrelevant but it was definitely part of their purpose once.
you must be young m8, they deffo saved many a older engine in my time.... I've replaced many a blown core plug through water or not Enough antifreeze, hope this helps.
Agreed… core plugs are nothing to do with freezing, its just a ‘lucky’ coincidence that they can sometimes pop but in reality even when they have failed the block can still crack as the ice will not be constrained or ‘released’ by the core plugs… they are only there to get the sand cast material out at the foundry when manufacturing period. Its an urban myth thats been around for a century.
Yep, called "core plugs" because they plug the holes left by the casting cores for the water cavity in the block.
Canadians disagree
Well done Isaac, you're coming on very well, John and Lee must be proud of you.😎
Good update… nice to see John back in charge and fully involved while the senior partners take a break from the machine shop…
I'd be tempted to put the pins for the interference fit rods in the freezer over night rather than heat the rods up as you risk changing the metalurgy
Try calculating how much contraction that will give you, versus expansion of the rods from heating.
Heating the conrod to fit onto the gudgeon pin is normal engine reconditioning practises for interference fit.
However the Barum boys are getting them too hot and heating too much of the conrod
@@SloverOfTeuth I've always used the freezer trick for stuff like that especially fitting radial bearings, I find they fall into place really well. I know of people using a nitrogen bath for interference fits,be careful with that shit mind
@richardbryant7505 Well, my freezer is at -20°C, call it 40°C below room temperature for argument. A nitrogen bath will be about -200⁰C, about 220⁰C below my example room temperature, so there would be about 5 X as much contraction with a nitrogen bath as with a regular freezer. I can probably heat con rods to about 250-300⁰C without risk of changing the metal's properties, about 225-275⁰C above my example room temperature, giving 6+ X as much expansion.
So, yes, a nitrogen bath or a safe level of heating of the con rods will both have about 5+ X the effect of putting the pins in the freezer.
Now, wasn't my original comment that if they need to heat the con rods like that to get the pins in, putting the pins in the freezer isn't going to work? And didn't I suggest doing some calculations? And aren't I the only one who's done them?
Lee just need to invest in some modern equipment to do this job, work smarter as they say.
Great work Isaac, just a small point with reference to heating of the small end, we were warned about overheating the small ends and had temperature sensitive paint which changed colour at a specific temperature,
Now I’m talking back in the 70’s and this was Opel the paint was used in conjunction with a special mandrill that set the gudgeon pin in the correct position in the piston, basically the same as you are doing.
Good video Isaac. That shop has changed massively in a good way. Love that Lotus engine. A masterpiece..👍
There's a breather tube on the Lotus Twincam that goes between the block and the head. It's just below the inlet manifold on the rear carburettor. It's much easier to put that on as you drop the head on rather than try fitting it afterwards. You can't really be sure it's located correctly if you don't do it in situ with fitting the head. Nice tidy job though, especially with the front cover. That's a real pain in the arse to get right unless you have three hands!
Nice intro Isaac. None of that creepy stuff! Well done on the content. I think I’ll head over and pick up a hoodie.
Well spotted Issac on the head torque settings
With the number of Figaro that you are doing, does it make sense to build a jig to align the rod to the piston, and a stop for the pin? Would this make the job faster and more accurate?
The cork gasket looks like its been over tighten and squishing out.
Sound! For a moment, on the 1st release, I thought Isaac had snuck off to film school, and was going all avante gaurde (sp?) on us, what with the music, and the artful gestures. Thanks, Isaac.
Much prefer Isaac only videos ❤
should have used the timing cover centralising tool
There's no such thing as freeze plugs the block cracks first before they pop out every time unless they are crap there called core plugs
Here in Canada we call them frost plugs & I personally have had 5 engines that didn't have enough antifreeze in when the temperature dropped very quickly and the frost plugs popped out or cracked. Thus saving the block.
The only engines I've seen with a cracked block is when the engine didn't have a completely full cooling system so the water wasn't against the plugs under pressure to let them pop.
In Australia they are often referred to as welch plugs.
I can assure you that, way back when god was a boy, the fact that core plugs would pop out if a block froze, saved many an engine, when I was an apprentice people still covered their engines in old blankets or drained the radiators on cold nights.
@stevefuller1779 no the block cracked or the core plugs were crap
@georgebettiol8338 same here in California
Nice 1 Isaac,
Cordialement,
👍👍
Much better start to the video without the voiced intro.
Please keep it without the annoying intro.
Lads, Get Rid Of That Shite New Intro - Stop Messing When Everything Was Originally Very Good....
You can't please everyone..
@@redchemicalsltd2324 The new intro is fine. I come here to watch the content, not to judge the video production qualities, or to see if the intro is going to win an academy award.
When are you going to get offered a partnership in the business?
😎😎😎😎😎😎
Logo looks weird being centred.
What do the following car brands have in common? Bentley, Audi, Toyota, Audi, Mercedes, Lambo, Ferrari, Nissan, Lexus, Infiniti, Lotus, BMW?
@@ataxpayer723 But not on shirts etc.
You should leave Lee out of it more often
It's Saturday
lee who ???
Well do ne again ìsac on the video you do lee proud. Ps ask fora rise😂
What a find. The Penny Black of Lotus data sheets.😂