Puff of Smoke

[ChrisA]

Okay folks, I got the 73 out of winter storage and drove it today. I primed the oiling system first then fired her up. As I was driving I noticed a puff of smoke out the exhaust in between shifts. Anyone have a guess as to where the oil is getting in at. I would guess a valve stem seal. Havent run a compression check yet. Car was great before put away for winter. All gauges good while running. Could it be a PVC valve issue pulling some weird issue under the valve cover? No smoke while idling or under throttle in any gear, just between shifts.

Thanks in advance.

[LanceM]

Valve guide seals would be the likely culpret. During shifts engine vacumum is high, pulling oil past the seals into the combustion chamber.

[tanny]

Probably the stem seals but stuck oil rings might be possible.

[280zx Fever]

Sounds like its running rich...

What colour was the smoke ?

[ChrisA]

Hey Craig, smoke was light blue. I have driven the car 3 times since and only get the smoke in the morning after she's sat all night. Still think it might be rich? Color Tune says no.

[sblake01]

Blue smoke=oil smoke. Probably valve guides.