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Yesterday I towed home a '94 945T with my '83 245.
The most obvious flaw with this 940 is that it blows smoke out of the tailpipe - substantial puffs at idle, and a solid dense stream with any throttle application. The smoke is white and persistant, the tailpipe has a thick coat of wet oil sludge, and most of the joints throughout the exhaust system are wet and/or dripping with oil.
Naturally, it was rather cheap. I am new to 900's and to turbos, so I am seeking comments on my inspection and repair plans.
It has 145K miles and no maint. records. I got it from the original owner who had been neglecting it for several years.
Compression test (cold): 160,150,155,168
I am hoping that my compression readings rule out major problems in the cylinders, so I am focusing on crankcase ventilation first, then turbo inspection. I did remove the CBV diaphragm after reading somewhere in the faq that a torn diaphragm can send oil back through the vac lines into the intake manifold. I found lots of oil there too, but no obvious rupture.
Aside from the smoke, I have noticed an odd thing that has me wondering about the headgasket too: I have only run the engine briefly several times and not long enough to get it hot, but twice I have found moderate pressure in the coolant resevoir tank within a minute or two of shutting off the engine. Coolant and tank look pretting clean, but I am wondering if the pressure is a sign of a blown gasket.
I will have the intake off to do the oil trap. I don't know if I'll have the exhaust manifold off yet, but it doesn't seem much deeper to go to pop the head off. I did a headgasket on my 83 240 - but I am mildly nervous about exhaust studs on the turbo.
I am reading quite a bit in the faq, but any comments welcome. thanks
a couple pics: http://tinyurl.com/2dbng7
joe
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