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202 rockers tapping on cover - What sorta cam lift would do that?

Hey fellas,

I've recently rebuilt an old 202 at 40thou, and it's got an unknown camshaft in it. I've ran a red head on there with adjustable rocker gear, but more recently switched to a 12 port head with fixed rockers. Both heads I'd had issues with rockers hitting underneath the rocker covers and impingement marks were evident. I've used factory red, then black rocker cover and even an aftermarket redline one to no avail using 2 x rocker cover gaskets. I've since just bought an aussiespeed tall rocker cover, but my question is this:

How much lift would a cam have to have, for the rocker gear to be tapping the underside of a rockercover using 2 x gaskets?

The cam has some identifying marks, which are as per follows:

961445 stamped on the back of the cam and from the front lobes going back: C2 D2 CWC 2601 D15

No bloody ideas as to what cam it is though? I've done a good search and it doesn't seem to be from any major manufacturer that's still around.

Thanks in Advance.

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Another thing to add, is that I'm running brand new 179/186 hydraulic lifters "that I was told are specific for adjustable rockers" with this cam, as to begin with I was running a red head with adjustable ball rockers, only to find that the head had completely stuffed valve stem guides, so I swapped over to a 3.3 black head.

Could those lifters have differences there somewhere, and enough to cause rockers hitting the cover, even with standard length 202 pushrods?

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I'd rather drive my old holden than a new ford!

If you're using 202 pushrods with lifters for "adjustable rockers" it's likely your rocker geometry is wrong. From memory with adjustable valve trains the lifter cup height is higher and they run a shorter pushrod. Are your rockers shimmed up to get the correct clearance?

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Cheers
David

aka hq308belmont

My Archived Shed

check the height of the rocker posts cast into the head
to see if there the same
i had to get mine machined down to convert my head from pre set rockers to adjustable type

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check your pushrods are correct legnth ?

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Pushrods are standard 202 length ones. Marginally shorter than the 179 ones I have. Am using the 179 type lifters. Don't know if there's any difference there?

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I'd rather drive my old holden than a new ford!

Got it sorted fellas. Installed the aussiespeed rockercover. Loads of clearance with it. Still no fckn idea what the cam is, but it does run well so it can stay in there. Thanks for the replies fellas..

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I'd rather drive my old holden than a new ford!

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