[DeTomaso] Venting crankcase to valve cover (was Oil pan gasket recommendation?)

[JDeRyke at aol.com]

In a message dated 10/3/08 12:41:19 PM, kenn_green at yahoo.com writes:

> I recall that back in the mid 70s people did things to keep oil out of the 
> heads, things like restricting the flow of oil through the pushrods.  I think 
> the belief was that under prolonged high RPM running (which might be 5,000 
> RPM with a stock Cleveland) the oil did not drain back into the pan fast 
> enough, resulting in oil starvation (at the pump).
> 
Possible, but like everything else, it's a balancing act. Too LITTLE oil 
flying around in the 351C heads causes valve springs to overheat, dropping revs. 
Especially with triple springs. Best= a 10-qt pan, oil passage restrictors 
(except when running hydraulic lifters. They'll get noisy during start-up) and 
being sure the stock drainback ports are open. As I said, vapor degreasers during 
a pro engine overhaul do NOT necessarily clear sludge from the doglegged 
drainbacks. FWIW- J Deryke



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