Ot or not?

[JIPJOBXX]

Just wondering how to test engine to see if you have a broken oil wiper ring or leaking valve stem seals. Never have done this operation and wondering how can one preform this test??/Thanks

[Rusty O'Toole]

You can do a compression test. This will tell you if you have low compression. If you have low compression on one cylinder squirt some oil in there and retest. If compression comes up the rings are bad. If it doesn't the valve is bad, most likely the exhaust valve. Or, long shot, hole in piston or broken piston.

You can buy or make a device to screw in the spark plug hole, connect to air hose, listen at intake, exhaust, and oil fill pipe to find source of leakage.

Intake (carburetor) hiss = bad intake valve

Exhaust (Tail pipe) hiss = exhaust valve

Oil filler hiss = bad rings or broken piston

Bad valve stem seals = smokes when you lift off the gas.

Bad rings = smokes when you tramp the gas.

[Rusty O'Toole]

Hold a piece of stiff paper against the tail pipe with the motor running. Paper should blow away from pipe. If it sucks against pipe you have a bad exhaust valve.

[drillmastertommy]

You can do a compression test. This will tell you if you have low compression. If you have low compression on one cylinder squirt some oil in there and retest. If compression comes up the rings are bad. If it doesn't the valve is bad' date=' most likely the exhaust valve. Or, long shot, hole in piston or broken piston.

You can buy or make a device to screw in the spark plug hole, connect to air hose, listen at intake, exhaust, and oil fill pipe to find source of leakage.

Intake (carburetor) hiss = bad intake valve

Exhaust (Tail pipe) hiss = exhaust valve

Oil filler hiss = bad rings or broken piston

Bad valve stem seals = smokes when you lift off the gas.

Bad rings = smokes when you tramp the gas.[/quote']

Well that's a question answered for me, I get a proper cigar smokers plume from my exhausts when I use a heavy foot on my throttle.