how will i see if rings are gone or if its the valve seals car got oil on spark plug and its smoking when i drive it

 

do a compression test then do it again after squirting a little oil in throught the spark plug hole, if the readings increases the oil made the ring seal and your rings are bad.

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ICON Motorsports

1st & 3rd

 

Right. When you do the compression check, make sure all the spark plugs are removed and the injectors are disabled so fuel won't be getting squirted into the cylinders.

The readings between the highest and the lowest cylinders should not be greater than 10%. The closer they are to each other, the better.

Squirting oil into the cylinder(s) will cause the compression to increase some, but there should not be a dramatic increase.

When testing the compression, make sure that the very first pressure jump is close to the max pressure you get. That is, the pressure should not be low on the first crank and gradually increase with successive cranks.

Crank the engine at least 5 revolutions for each cylinder. If you get, for example 160 psi as a max reading after 5 cranks, the first crank should be well over 100.

A leak down tester is probably the best way, but using it calls for having a leakdown tester (two guage arrangement made by companies like Moroso, etc.) and an air compressor.

The actual maximum compression reading you get depends on a lot of variables - mileage, camshaft duration, rocker arm ratio, etc.

Post the numbers after you done the test with all the mods you've done to the engine (if any) and we'll try to help with the evaluation.

Jake



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1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9

 

when the rings are shot you will get excessive crankcase pressure. Pull the oil filler cap with the engine running and observe.
Usually you would get the blue/white smoke during full throttle as well.