My Jeep in sig.
So basically, I've had it back for a couple of weeks.
Broke in and initial run for about 50 miles then oil changed. The current oil has been in for about 400 miles now.
Oil is 10w30 VR1 conventional.
Have driven at varying speeds and not been babying it. Done many 30-60 pulls then let the engine slow the vehicle. Lots of mixed highway.
Still haven't gotten rid of the issue.
Upon start up, the exhaust is clean. Driving, the exhaust is clean. However, once warmed, if stopped at a light/stop sign, etc, I get the exhaust smoke. Blue in color. Not real bad, but I'd hate to be next to me with windows down.
I am running Wiseco forged 21cc pistons.
The ring spec is:
Top Ring Type: Moly-Faced Ductile Iron
Second Ring Type: Phosphate-Coated Cast Iron
Oil Ring Tension: Standard Tension
So, no chromed rings. These things should be seated/sealed by now I'd think
Reading other forums, it may be valve seal issues. I have positive seals installed.
Pulled spark plugs to look. The 2nd and 4th on passenger bank have a shine to the black on them. Nothing really bad, but have a bit of residue on them. The second one actually looks the worst with the electrode also black.
The others all look normal to me. If they have any black on them, it is a matte color with no residue.
Most plugs look like this:
This is the 2nd plug passenger side (Cylinder #4):
This is the 4th plug on passenger side (Cylinder #8):
So, am I on the correct thought process of having the shop check out the valve stem seals on those two?