Jim Grant's Tech Tips
‘92 Pontiac Grand Am, Blue Puffer with Oil Change
Q: I own a Ď92 Pontiac Grand Am 2.3 liter quad 4. My question is why does my car blow blue smoke, when I replace the oil?
A: If youíre getting a major puff or bellow of blue smoke only after an oil change then I would suggest checking following; 1. The oil/air separator crank case vent hose from the timing cover to the oil/air separator. 2. The oil/air separator. 3. The vent hose from the oil filler tube to the oil/air separator (which is really a drain). Itís likely that oil is puddling in the oil/air separator and the sudden rush of oil down the fill tube is pushing or burping enough oil to get into the vacuum hose from the intake manifold to the oil/air separator. It could be as simple as installing a replacement oil/air separator or something much more entertaining.