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Message: <blockquote data-quote="dennychew" data-source="post: 216163" data-attributes="member: 4957">Hi rubes72,I faced somewhat similar problems on my 1989 E30 after I did my regular service (this is my first service after I bought the car early this year) but it was not the tick sound.It was the "tak tak tak" sound. Its there even when the car is idle with the engine on. The sound is louder & more frequent when on high speed. I brought to my mechanic & they said it could be either the engine oil (I changed to fully synthetic oil with 10K km during service) or hydraulic lifter wear off.The sound got worse until I really cannot stand it no more & I changed to new set of hydraulic lifter last week & the sound is gone.So it could be due to the viscosity of the engine oil or the hydraulic lifter wear off. My case is the later.</blockquote>