Oil consumption and PCV valve

[Barry_R]

Very good chance it was seals/guides. The teflon/white plastic style seals are not very good - very unforgiving of any guide looseness or surface issues on the stem. You can get viton style seals that fit in the same spot and are far better on a driver.

I spend an inordinate amount of time on intake fitting - they are very prone to leakage as already mentioned. I install gaskets on the heads, and then use the distributor as a plug in locator. I square the vertical "china wall" spacing front and back. Then I stab a feeler guage at the upper and lower corners of each end of the manifold/gasket interface. Its not at all unusual to fit a .015 or more guage at one spot and have a snug fit at the other. I make notes on the intake with a Sharpie, and then mill it to get things square. I install with a very thin skin of silicone everywhere and a thick bead front and back. The silicone seals things up and also gives you a visible indication that contact has been established - you get a very tiny "squeeze out bead" if done right.

Note: avoid Ultra Black silicone like the plague. It will never harden - even after 24 hours and a dyno run. I pulled an engine down for a water leak and that stuff was still wet! First and last time I ever used it... gray/silver looks nice and works well....