My trusted 945 T with 190K on the clock has begun to make quite a racket as she warms up for the drive to work. The noise sounds like it is coming from the valve train (it is a click/clack not a clunk) and it sounds louder on the passengers side than the drivers side, as though it could be related to an exhaust manifold connection.
She runs fine otherwise and the noise subsides considerably as the engine reaches operating temperature.
I recently installed an IPD high performance stainless steel exhaust system and the noise seems to have coincided with this addition. However, I can not see or detect any looseness or leaks in the exhaust system.
Turbo and automatic tranny on this car are original and I recongize they are nearing the end of their expected lives. However, I do not suspect these systems in this case.
Any thoughts from 940 folks out there about causes or fixes.
Thanks
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