Quote:
Originally Posted by knucklesplitter
I've heard you mention this before, and I dunno is I buy that. The difference between a 5/8" line and a 1/2" line is not much, and the crankcase breather line has a significant (and obviously on purpose) restriction in it near the PCV valve.
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The whole line size for breathers has always seemed like voodoo to me, but I've had 1st hand problems with oil pumping out the heads, and the line size was identified as part of my issue.
Also. 5/8" ID is 50% larger in area than 1/2" ID (0.307 in^2 vs. 0.196 in^2). That's pretty significant. And that restrictor is not in line with the breather, it's only in line w/ the PCV, is it not?