probably wouldn't leak enough compression to make a noticeable difference in compression numbers. especially if the crack is filled with oil
hazing or smoking at idle lose of oil out exhaust
- Thread starter malkintent
- Start date
If a shop told me it was the turbo and that didn't fix it, that MFer would be coming back out at their cost
ive been through this same exact scenario... head gasket job on a customers truck. got it running and same thing, cloud of smoke and burning oil. only visible at idle for cloud of smoke but would clear up. Come to find out, machine shop messed up the installation of the valve seals, how i diagnosed this was, run the truck and get it good and hot. then let it sit over night, pulled both manifolds and saw oil in the manifolds. pulled valve covers. took a good look at the valve seals. appears that they took a long socket and drove them on with a hammer. non the less..... changed the valve seals in the truck with heads on and i no longer use that machine shop... never been so mad in my life. hope this helps
edit... it made perfect sense to me after as well, cause the valve seats wont leak enough oil to visually see generally while its running, but when you let the truck sit, oil pools up in the manifold and thats where you get your start up smoke until it burns it completely out of the manifold again.
edit... it made perfect sense to me after as well, cause the valve seats wont leak enough oil to visually see generally while its running, but when you let the truck sit, oil pools up in the manifold and thats where you get your start up smoke until it burns it completely out of the manifold again.
my local gm dealer has seen this once also in a 2015. talked to him last night gms fix was to replace the heads
