need help: my sc smokes dont know why.
08-10-06, 10:56 PM
#24
Lexus Test Driver
im positive it's ur valve stem seals. When the engine is idle the oil drips onto the valve and that mixes into ur a/f, that burns off and that's y u get the smoke. pretty expensive to fix.
08-15-06, 06:21 PM
#29
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oright i just purchased an ecu, and connected it. the car still has the same problem. white smoke comes out of the exhust and it smells like gas, and when the car warms up the smoke goes away. and there is gasoline in the oil.
08-16-06, 02:51 PM
#30
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As megadeth pointed out, it's likely the valve stem seals.
The supra owners out there are VERY familiar with this problem. The seals on the valve stems get dried out and leak while the car is warming up. After the car is warm, the seals swell and make a good seal again... and the smoking goes away.
I was quoted 10 hours of labor by a VERY reputable shop to perform this service... it's time and labor intensive. There's two ways to do it: pull the head, or pressurize the cylinders with air and do it with the head still on the motor. One way has you buying (and paying for installation on) a new head gasket... the other does not.
Now the fouled plugs and gas in the oil suggest you might have a different problem, or a problem separate from the leaky valve stem seals. Have you tried changing the plugs and seeing how it runs? If the plugs are fouled, you're not burning all of the fuel you're sending to the cylinder any more.... which could be exacerbating your problem.... or an indication of the cause. I don't know enough to tell you the difference.
Good luck.
The supra owners out there are VERY familiar with this problem. The seals on the valve stems get dried out and leak while the car is warming up. After the car is warm, the seals swell and make a good seal again... and the smoking goes away.
I was quoted 10 hours of labor by a VERY reputable shop to perform this service... it's time and labor intensive. There's two ways to do it: pull the head, or pressurize the cylinders with air and do it with the head still on the motor. One way has you buying (and paying for installation on) a new head gasket... the other does not.
Now the fouled plugs and gas in the oil suggest you might have a different problem, or a problem separate from the leaky valve stem seals. Have you tried changing the plugs and seeing how it runs? If the plugs are fouled, you're not burning all of the fuel you're sending to the cylinder any more.... which could be exacerbating your problem.... or an indication of the cause. I don't know enough to tell you the difference.
Good luck.