Very interesting!
Should I be using the "Shell Rotella" oil in my 1975 292? Right now, I am using Valvoline 10W-30.
The motor has a rebuild 8 years ago, bored .040,
crank .010. It does blow some blue smoke when you
rev it up but not when idleing or cruising. Probably a valve that never did seat correctly. It has done that since the rebuild. Great compression across the cylinders.(125lbs) Did a leak down test and it was good.
Is there any way to solve the smoking problem? I was told that "umbrella seats" would solve the problem of a little leak back. These can be installed without pulling the head if you have the tool to "air up" the cylinder to keep the valve from dropping.
RapRap
1940 ChoppedChevyCoupe
