Valve seals or rings...
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Valve seals or rings...
Does anyone know how to tell whether it's valve seals or piston rings causing a motor to smoke? I know there's a way, I just don't remember what it is. Any help would be great. Thanks.
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Re: Valve seals or rings...
Perform a compression test and write down the results for each cylinder. Then add about two table spoons of motor oil to each cylinder and repaet the compression test. If the compression is higher during the second test then your rings are bad. If there is no change then the seals are bad.
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Re: Valve seals or rings...
You can also tell by checking when it smokes, if it smokes all the time, no matter what the RPM or during normal coasting is rings, if it only smokes while hard accelerating or descelerating is valve seals.
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Re: Valve seals or rings...
Originally Posted by hatch77
my car gives out a puff ONLY during WOT, and it smokes for only a split second...reckon it's probably the valve seals then.
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Re: Valve seals or rings...
Originally Posted by PJ2
If it's black smoke and not blue(oil) I wouldn't worry about it, that's a sign of a rich mixture at WOT wich is perfectly safe. What kind of mods have you done to it?
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Re: Valve seals or rings...
Originally Posted by PJ2
You can also tell by checking when it smokes, if it smokes all the time, no matter what the RPM or during normal coasting is rings, if it only smokes while hard accelerating or descelerating is valve seals.
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