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Old 11-27-2008, 07:59 AM
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PabloCruise PabloCruise is offline
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Join Date: Aug 2005
Location: Northern CO
Posts: 2,626

Originally Posted by leiniesred View Post
That is what the tappets always look like when the cam goes flat. *shrugs*

I have a hunch that modern engine oil is to blame for your flat cam.

In Austin Healey land, we've discovered cam destruction is often related to today's oils vs yesteryear's flat tappet technology. A brand new cam, with propper assembly lube and break-in, can go flat in < 1,000 miles on a healey! The big healys sport a big ol' cast iron I-6 tractor engine very similar to the FJ40's engine.
Today's oils often have less of some critical additives. (Zinc Dialkyl DithioPhosphate in particular (ZDDP))
Here is a great link:
Wow, this looks like a great read. I'm going to have to get another cup of coffee... Sure hope my cam is not flat. I should be able to measure lift at the rockers, eh?

1978 FJ-40
1974 FJ-55 w/ 3FE

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