Quote:
Originally Posted by CSX4279
Maybe you FE wizards can help on this one...newly rebuilt cast iron 427 sideoiler. Pentroof (non vented) valve covers..breather oil cap on oil fill tube at front of intake manifold..vent tube at manifold rear to "puke tank". Tank has both oil pan return AND vent road draft tube. I get oil leaking from draft tube AND liquid oil in puke tank.....being fed up with constant oil on my garage floor AND oil all over the chassis, I blocked off the puke tank (keeping it for looks only on CSX4000 firewall) and ran a PVC valve to the carb. Leaking stopped but when idling, it's like a five alarm fire with all the exhaust smoke and stink. So much so that the sidepipes actually had black LIQUID oil in them. I might add that I am running a solid roller and as a result the intake valley baffle pan could not be installed due to lifter height.....
Any ideas on how I can stop most of this blowby without changing the non-vented valve covers OR do I have no choice? Motor only has 1000 miles on it.
Thanks Bob |
Are you sure you had the overflow tank plumbed properly. The high bib on the passenger side goes down to the frame to scavange gasses like a road tube, the lower bib on the same side goes to the return oil line to the top of your "tee" oil pan (aviaid or similar). The idea is condensed oil vapors will sweat to the bottom of the tank and flow back into the pan.
The smaller bib on the driver's side receives the hot gasses from your transmission and the lower larger one accepts your hose from the rear of the intake manifold.
You also should have a basket with a screen of stainless steel wool in it to prevent excess slosh up into your puke line.
I used to have that setup with the non-vented pentroofs and the vent cap on the front intake manifold oil fill tube and never had the problems you're experiencing. Oh, and no PCV of any kind.