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WERK I is on to something!
Good one on the exhaust leak!
When I first got my car it had a tick tick tick noticable at idle for about 10 minutes after a cold start and then it would go away.
It was louder when sticking your head down under ths car and I could feel a little puff puff puff exhaust leak next to one of the exhaust port to header flange points.
When I removed the B&B headers that were on the car when I got it I found that one of the exhaust port studs had pulled from the head so it was leaking there and when the motor got hot the expansion of the headers sort of sealed up the leak to the point you couldn't hear it anymore.
I timeserted the 8mmx1.25 exhaust port stud threads in the head and that fixed it.
It's best to just timesert all the exhaust port stud threads as they are hardened steel so it never happens again.
I'll bet thats it!
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