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1988 944 Turbo Lifter noise

Engine

Vehicle Information: Model(924/944/968): 944; Year: 1988; Body Type: Coupe; Total Mileage: 141,000;

A sudden noise developed. After driving my '88 951 most of a day,then getting a smog test.I went to the local DMV to complete some paper work,after about 2 hours of the car being parked, I went to start the car back up. A loud lifter type noise was present. The noise was in time with engine speed. As the rpm would increase so would the frequency of the ticking.the noise was very loud at first,then it tappered down. It seems to be coming from the rear of the motor. I thought perhaps a clutch disk spring. I replaced the clutch,flywheel & all related parts. The lifter type noise continues on. Previous to the the start up there was no lifter type noise ever. Oil pressure has been high at all times. I searched the oil for metal type material & found it to be clear to the naked eye.

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