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| | | | Joined: Apr 2004 Posts: 375 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2004 Posts: 375 | We're back.
I just had my 235 rebuilt for the third time in 2 years and had a Tremec 600 installed. Everything works pretty good, but I've got an oil leak that I want to talk about.
Sitting on a flat surface, I get no leaks from the engine. After starting and driving the truck out of the garage onto my 15% sloped driveway, it leaks. After about 8 hours, I have a spot the size of a tea cup (2-3"). It appears to be coming from the back of my Offy valve cover gasket. Now, the guys that built thing know a thing or two about building engines; but...
This is a 62 hydraulic lifter engine with downdraft tube. The oil filler cap is not vented.
What gives? I'm a little concerned that if I don't have the issue on the flat, but do on a slope, I'm guessing oil is pooling in the rear of the head and not draining properly back into the pan. Right? What else could it be? Do I need to vent that valve cover?
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