smoking when accelerating

[Satara]

So a friend of mine has a z6 engine that starts fine and runs like a champ, however the problem we arehaving is figuring out why Its smoking out the butt. When its idling or pretty much anything that didn't require us to push the gas its fine. However, when we do give it gas the muffler is throwing out a nice white cloud. And when he really gives it gas it turns somewhat black. My first thought is it's burning to rich cause you can smell the fuel, but he also mentioned that his valve cover doesn't lock down all the way since the screws are semi stripped. Any advice would be much appreciated.

 

[sleeper si]

get a leak down test and see what the compression is.

 

[xxBLOOD88SHOTxx]

HG or warped head, which may or may not have washed down the cylinders.

 

[XpL0d3r]

White smoke generally indicates a head gasket or cracked head/block issue, black smoke is fuel related. Judging by how you mentioned the VC isn't all the way down, I'd say start there and get new VC screws.

 

[Osiris19]

Piston rings?

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[Satara]

So we pulled the. Head. Hg in great condition, no scratches on cylinder walls do I'm assuming piston rings are fine. We did find oil leaking from cyl head to exhaust mani and when we pulled dizzy is poured out from there. Any opinions

 

[Osiris19]

Cam seal on the distributor side and dizzy oring possibly. Weird that it wasn't headgasket. White smoke is definitely coolant.

 

[xxBLOOD88SHOTxx]

Head is maybe lifting under full load? Was any of the cylinders cleaner than the others?