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Old 09-16-2020, 02:56 PM   #4
Senior Member
Join Date: Mar 2017
Location: southern California
Posts: 725
Default Re: PCV valve good idea?

A PCV valve for a rear main leak sounds like a band-aid.
I would recommend fixing the problem, rather than band-aiding it.
Besides, do you really want to build up junk on the valves faster?

By the way, you don't say how fast your leak rate is.
A slow drip from a main seal on pre-war cars is very common, even when the cars were new.
"That's my wild unsubstantiated guess, and I'm sticking to it regardless of the facts!"
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