How would you know when to replace valve oil seals
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How would you know when to replace valve oil seals
So i know this is completely the wrong forum but i have a 98 passat v6 stock turbo in my garage and its burning oil. Either, bad turbo, pistons rings, valve seals, But how can figure out which it is. I would put this on a VW forum but this is not a car specific. it could go with any engine.
Thanx.
Thanx.
Last edited by 350 Rookie; 04-22-2009 at 03:42 PM.
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well when i blew my turbo on one of my dsm's i could floor it and get on boost and there wouldnt be any smoke. then as soon as i let off, tons of smoke. thats how i knew it was my turbo. another way to find out would be to pull the exhaust manifold and see if its covered with oil. if the manifold before the turbo and closer to the head isnt covered with oil and the exhaust housing after the turbo is covered with oil, you'll know where your problem resides.
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I know this, which is why I asked mileage. Leaky valve stem seals usually result in blow by through the intake manifold via PCV, and could be a source of oil consumption. But the first thing I would check, if I have a high oil consumption motor, is check leakdown first...then work from there.
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I can also take the intake manifold off and check on the intake valves to see if its oil covered right? That way, it would be seals?
Last edited by 350 Rookie; 04-22-2009 at 06:50 PM.
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I know this, which is why I asked mileage. Leaky valve stem seals usually result in blow by through the intake manifold via PCV, and could be a source of oil consumption. But the first thing I would check, if I have a high oil consumption motor, is check leakdown first...then work from there.
leakdown is also a good place to start
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If it blows a good amount of blue smoke when you start it, that's a sign of the valve stem seals leaking. As when you turn off the motor, oil will leak past and down the valves/combustion chamber. When you start it, it will burn it off and then not smoke until you let it sit again.
Turbo oil leak. Just pull off hose just forward of the turbo's compressor side. If it's all oily, there you go.
Rings, you'll see oil when driving and especially in boost. As said, a leakdown test would verify
Turbo oil leak. Just pull off hose just forward of the turbo's compressor side. If it's all oily, there you go.
Rings, you'll see oil when driving and especially in boost. As said, a leakdown test would verify
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Ok so i took off the intercooler pipe today right before the intercooler and i saw maybe a glass full of oil just pour out. I was shocked how much oil came out. So i guess the turbo needs to be replaced.
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