How to tell, Blown motor or turbos?
#1
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How to tell, Blown motor or turbos?
A friend of mine just bought a 93 touring w/ a bunch of problems. The car smokes really bad at start up and continues to smoke (but to a lesser extent) once warmed up. The car has no vacuum leaks but will not boost above 3 psi. The engine still starts up fine both warm and cold though.
My guess is that the car just has a blown turbo. What can I do to be sure?
My guess is that the car just has a blown turbo. What can I do to be sure?
#4
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What kind of smoke is it? If it's thick, white coolant smoke, then a compression test may not show it. But the compression test is still worth doing first.
A coolant system leakdown test and testing for hydrocarbons in the coolant are what to do next if it seems the coolant seals are shot but compression is good.
Dave
A coolant system leakdown test and testing for hydrocarbons in the coolant are what to do next if it seems the coolant seals are shot but compression is good.
Dave
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I don't think it's coolant smoke, I blew a coolant seal on my TII and I could tell by the smell. His car also doesn't lose water so I think his coolant seals are ok. I will test the compression as suggested, but is there any other way way to tell whether the smoke is coming from the turbo or the engine?
#6
Racecar - Formula 2000
Check the hoses and couplings (and the intercooler) between the turbos and the throttle body. There will normally be some oil in these areas, but big puddles means the smoke is from the turbos leaking excessive oil.
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Originally Posted by HHTurboVert
A friend of mine just bought a 93 touring w/ a bunch of problems. The car smokes really bad at start up and continues to smoke (but to a lesser extent) once warmed up. The car has no vacuum leaks but will not boost above 3 psi. The engine still starts up fine both warm and cold though.
My guess is that the car just has a blown turbo. What can I do to be sure?
My guess is that the car just has a blown turbo. What can I do to be sure?
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#8
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Originally Posted by Mahjik
Compression test will tell you how healthy the engine is (or isn't).
It won't tell him anything about the oil control rings, which are the reason why a motor will burn oil internally... It will tell him if the apex seals, etc. are good which has nothing to do with smoking..
#9
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Originally Posted by FCdemon
It won't tell him anything about the oil control rings, which are the reason why a motor will burn oil internally... It will tell him if the apex seals, etc. are good which has nothing to do with smoking..