Oil consumption, smoke under boost, what to replace
#16
Racer
Thread Starter
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Here is how the spark plugs look. This is the same plug (cylinder 2) with flash and without flash. You can see the ashy deposits on the plug and all plugs look pretty much the same.
![](http://www.stratifiedauto.com/Alex%20Public%20Folder/944T%20plug%20cyl%202-W1024.jpg)
![](http://www.stratifiedauto.com/Alex%20Public%20Folder/944T%20plug%20cyl%202-W1024.jpg)
![](http://www.stratifiedauto.com/Alex%20Public%20Folder/944T%20plug%20cyl%202%20with%20flash-W1024.jpg)
#18
Racer
Thread Starter
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Triple checked and the AOS goes from the Jboot to top of AOS and the ISV goes from the manifold to the cold pipe (the pipe between the throttle body and intercooler)
#20
Racer
Thread Starter
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There is NO oil in the pipe FROM the turbo to the intercooler (zero oil). Where would the oil be coming from in the cold pipe? The idle valve?
#21
Three Wheelin'
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Sorry, I got interrupted before I finished my thought.
The compression and leak down are very good, so I do not believe that blowby is an issue. The plugs have some deposits on them which may be from oil that gets in the intake system from the compressor side and then dissipates before it collects anywhere. Any idea how old the plugs are? I thought you could get on the boost until it starts smoking and cut the throttle, shut down the car and pull the hose to see if any oil collects at the throttle plate. If nothing shows up, the oil is probably getting into the hot side which is the more likely scenario.
Oil smoke screen under boost is a classic turbo failure. It is a much less expensive repair than an engine as well.
The compression and leak down are very good, so I do not believe that blowby is an issue. The plugs have some deposits on them which may be from oil that gets in the intake system from the compressor side and then dissipates before it collects anywhere. Any idea how old the plugs are? I thought you could get on the boost until it starts smoking and cut the throttle, shut down the car and pull the hose to see if any oil collects at the throttle plate. If nothing shows up, the oil is probably getting into the hot side which is the more likely scenario.
Oil smoke screen under boost is a classic turbo failure. It is a much less expensive repair than an engine as well.
#22
Racer
Thread Starter
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Sorry, I got interrupted before I finished my thought.
The compression and leak down are very good, so I do not believe that blowby is an issue. The plugs have some deposits on them which may be from oil that gets in the intake system from the compressor side and then dissipates before it collects anywhere. Any idea how old the plugs are? I thought you could get on the boost until it starts smoking and cut the throttle, shut down the car and pull the hose to see if any oil collects at the throttle plate. If nothing shows up, the oil is probably getting into the hot side which is the more likely scenario.
Oil smoke screen under boost is a classic turbo failure. It is a much less expensive repair than an engine as well.
The compression and leak down are very good, so I do not believe that blowby is an issue. The plugs have some deposits on them which may be from oil that gets in the intake system from the compressor side and then dissipates before it collects anywhere. Any idea how old the plugs are? I thought you could get on the boost until it starts smoking and cut the throttle, shut down the car and pull the hose to see if any oil collects at the throttle plate. If nothing shows up, the oil is probably getting into the hot side which is the more likely scenario.
Oil smoke screen under boost is a classic turbo failure. It is a much less expensive repair than an engine as well.
Those plugs are pretty new and have around 2000km on them. If the plugs were completely clean of ash I would totally be on the same page that it's just the turbo.
I could just swap turbos, I have a spare 26/6 I can try. I am just a little worried about the sparkplug deposits and was thinking either valve seals or oil control rings (not compression rings) but it seems you folks don't think this may be the case which in my opinion would be great.
#23
Burning Brakes
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Smoke under boosted acceleration - blue smoke and strong smell.
#24
Racer
Thread Starter
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I once thought I had this problem just after the purchase of a California Car. Looked in the Rearview Mirror while in Third, and I was sure the Engine had exploded. Immediately pulled over to check it out. Two black trails a car width apart pointed to the problem, - warm weather Tires.