Removing and fitting camshaft bearings
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- Опубліковано 15 вер 2024
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This video is produced for entertainment purposes only and Britannica Restorations nor Michael Wesson and/or guests featured in this video shall not, in any way or measure, be held accountable or responsible for any damages related to attempted repairs as pictured in this video.
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Great stuff.
“Project Goldfinger” is coming along well.
ua-cam.com/video/6D1nK7q2i8I/v-deo.html&pp=ygUKZ29sZGZpbmdlcg%3D%3D
@@BritannicaRestorations ❤️
thanks for confirming what the plugs are for, my 300TDI has yellow plastic plugs and they have crazed me for years thinking what on earth are they for!
You have done well fitting 'pre-reamed' bushes without issue.
I on the other hand, have seldom found a pre-reamed bearing set to fit a camshaft yet.. In fact twice they weren't even remotely close.
I have tried the split bearings from a well known Engineering supplier, and they also went in the bin - yet others have had success - very odd.
What was the solution? Reaming original 'jigsaw' bearings individually before fitting.
All I could do was offer them up to the camshaft - if they all fitted on the camshaft to near tolerance (out of the block) and could be removed again without damage - that was half a result.
The other half result, is to then fit them to the block and hope that out of the four, there isn't a single one a thou' out of line or the camshaft won't go.
My theory is that the pre-reamed bearings/bushes are marginally oversized to allow the best chance of the camshaft fitting - then the oil hole was reduced to increase pressure to compensate for the deviation from being oversized (internal diameter) *
With recommended tolerances in the book of words to the nth thou' between camshaft and bearing, I cannot see how it's possible to achieve that without line-reaming to match the camshaft unless the pre-reamed bearings are made oversized.
I think even from factory, the tolerances specified are a fantasy, and that is why some suffer low oil pressure/spun bearings and some don't.
Unless anyone believes that every block and camshaft made were machined to the exact same precision, and line-reamed perfectly.
Certainly my experience (even with probably oversized, pre-reamed split bearings) is that it is hit, or miss, and I wish everyone the very, very best of luck attempting this job.
*For the tolerances involved it was beyond my measures to definitively say that bearings are oversized, though they seem to be.
been wondering whether to tap those blanks off at the top, thanks for the explanation, had me puzzled
No problem 👍
Don't need to say where the come from. The pink and yellow bags given them away.
Hi Mike, quick question. So I got a set of pre-reemed cam bearings from "That unnamed engineering place", and I spent a healthy 3 hours installing them and getting the oil ports all lined up. I'm wondering how much resistance I should now encounter turning the cam in place. I've got regular engine oil acting as the lube at the moment, and the head is not on, so it's just like yours in this video. Should I be able to turn the cam by hand (which I can't do) or only when I put a spanner on the end like you did. In that case I can rotate it with no binding, but there is some / mild effort required to turn it. Cheers, -John from New Mexico
I think you have it right - there will be resistance with the cold oil which is normal - I have not been able to turn them by hand - they will settle down once run
That's a really reasonable price for the cam bearing remove/replace tool Mike, bargain. Big tool, little money. I was wondering how you kept the grit from damaging bits, masking things it's easy to miss something critical.
Hi Mike, hey since you installed new bearings, if the cam checked out OK will you be reusing it or with new bearings will you bring a new cam? Cheers.
Unlike the Rover V8 cams that were made from cheese, the 4 cylinder ones have been pretty good - only issues have been the very cheap rollers that are still kicking about that ended up like threepenny bits and buggered the cam - very easy to spot
Good tool Mike, instructions, what instructions.
Thanks 👍
Very clever tool though there should be a parts list at least, in case you need to replace a part. I wonder why that new bearing has such a smaller oil passage?
It's to restrict oil flow to the rocker shaft and concentrate flow to the main bearings
@@BritannicaRestorations Oh, OK, thanks for the info!!
Mike did you use retainer compound in the end?
Yes - I though there was a section showing this
That’s all we needed on a Satdy; a mechanic inserting his big tool! 🙈👍🏻🙏🤣🦘