blue engine smoke

[fishstick]

My 73' series III smokes too much. Runs great but a blueish smoke comes out the tail pipe. I was thinking I might have a stuck valve. I was thinking of pouring sea foam down the carb. Any ideas/recommendations?

[LR Max]

Sounds like a blown oil ring in one of you're pistons.

Do a compression check. Then run another compression check, but first squirt some motor oil into the combustion chamber. If the compression is higher the second time, then you have a blown oil ring. Also look at you're spark plugs and compare all 4 of them.

[fishstick]

Great thanks... pull the spark plug and squirt oil right in the chamber through the sp hole?

[tobbjo]

Valve stem seals

[ISUZUROVER]

Valve stem seals

If the valve stem seals are worn you usually just get a puff/cloud of blue smoke on startup, not continuously. But if they are completely shot it could be worse I suppose.

I secong the oil ring - It can't be the compression rings though otherwise you would be pressurising the sump and oil would be going everywhere inside the engine bay (more than usual).

[Old Scout]

:cow:

[tanman2003]

if compression test is bad do wet test also a leakdown test is helpful to indicate where the leak is coming from, rings valves