Ok here is an update on the Van.
I got to thinking about the low compression in 3 & 4 and I'm NOT a pro by any means but I couldn't see how a cracked intake would result in low compression like I 1st thought. I can see a misfire but not low compression. So I got to thinking ether bad valves or rings. The motor has 130,000 on it so my guess was the valves. With noway to do a leak down test I shot a squirt of oil in the 3 & 4 to see if compression came up but very little changed. Next I hook my air compressor to the 3 & 4 with them at TDC put about 30-50psi in and I had hissing and air coming out of the exhaust pipe.
So I'm thinking bad exhaust valves
Monday, September 6th, 2010 AT 2:22 PM