Low oil pressure after shim

[snailexpress]

(05-22-2018 )pearce trucking Wrote:  Hi Unilevers.
I'm still a little fuzzy on oil pressure I guess. Could you explain what happens to oil when the cam bearing spins? I know the wear rate is greatly accelerated, and as such, the oil passage to that bearing becomes enlarged. How does this significantly reduce oil pressure? I'm asking because I don't know, not because I'm disagreeing.
Thanks.

Initially bearing will turns little bit and close oil passage completely. Now it dry and will got hot up to welding bearing to the cam. Cam is much stronger then bearing materisl and bearing starts spinning in the head. Oil passage in this bearing now is open and has no restriction to the oil flow.
All undamaged bearings ( cam and crank) now starving on oil because fluids go the way with less restriction. Next bearing is ready to go kaput. Mostly it's cam bearing because it's on the end of oil pressure system. Some pics to understand it better.

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