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Backward cam bearing - what’s the problem…?

Posted: Fri May 10, 2024 8:14 pm
by gs.davies
I’ve got the front cam bearing in backwards. Car has done best part of 7000 miles, uses a fair bit of oil mostly through leaks I think but some through the valve guide seals.

I do have a plan to build another gearbox, pull the engine, fix the bearing, probably fit a different cam etc etc etc, but that’s a little way off.

I don’t suffer the same problem where the rocker box fills up in the way Graham’s one did (it’s a small bore with tappet chest covers, so if any flooding is going on, it’s taking place there..) so it leaves me wondering, what’s the problem?

Just being pragmatic and trying to avoid making work for myself..

Thoughts?

Re: Backward cam bearing - what’s the problem…?

Posted: Fri May 10, 2024 9:53 pm
by timmy201
There’s two slots on the cam for the oil feed. One takes oil to the head and the other onto the cam thrust plate and timing chain.

If you have the bearing the wrong way you won’t have any oil feed to the cam thrust, as from what I can tell it goes via the notch

Cam
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Bearing https://mk1-forum.net/viewtopic.php?p=220281#p220281
IMG_0385.jpeg