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Aftermarket Cam Problems In Rb25 - Need Advice!

DanielH

By DanielH,
in Tasmania

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DanielH Community Regular

DanielH

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Posted

Hey guys,

The story goes, i bought some Camtech 272 cams brand new, and fitted them to my RB20, ran them in exactly as camtech specified, and had no issues at all, but shortly after this the rb20 melted a piston, and the cams were removed and the car was sold.

I then put the cams and lifters into my RB25, and kept the lifters in order.

I got said RB25 running a couple of days ago, but had to remove it again due to an odd screeching/squealing noise and sky high oil pressure (much higher than 100psi on cold start).

I thought the issue to be oil pump/ main bearing issues as i hadnt checked these out before putting the motor in, but it all looks fine inside, so i looked further and found most of the cam journals in the head to be almost completely dry, and the cam caps were all "polished" looking in a few spots.

I havent got any plasti-gauge to roughly check the clearances yet but the cams seem to be too tight in the head, causing them to run dry, luckily it hasnt damaged the cams.

The only thing i can think of to be the issue may be that i stupidly didnt use any run-in paste or run-in oil, thinking that the cams had already been running in an RB previously.

Could there be anything else causing this issue? or shouyld i just follow run in procedures again and hope for the best? i really dont want to remove the head and strip it back down to go to the machine shop.

Thanks in advance for any help!

Daniel.

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