Originally Posted by Stanley Siringoringo

Try turning your ac on. It may be the ac compressor. I have a ticking noise, and when I turn on ac it goes away. I had a local mechanic check it out, without me telling him I think it maybe the ac compressor, he recommended that, the ac compressor is the cause of the noise.

Originally Posted by jameshuang86

Hey guys, hoping you guys could help me out.. I'm getting a ticking sound coming from the passenger bank side of the engine (BMW 550i, 68k miles), and had two independent shops check it out and one said the car was misfiring due to injectors, and the other said the injectors were fine and the car is not misfiring and to not change the injectors. I am getting no CEL light, car drives fine and MPG is fine.. the ticking sound usually comes after the car is completely warmed up, and when in gear and accelerating or revving in neutral. It is engine speed dependent, so the faster the engine revs the more ticking sounds I get..

Let me know if any of you guys have any insight! greatly appreciated..

Originally Posted by H F

try this little tick i learned in high school auto shop( back in1978 ) get a piece of wood 1/2 inch x 1/2 inch 18 to 24 inch long.. ( wood has an excelent transfer of sound ) round of one end, put that end on ur ear and the other end touch any part of the engine,,
ull be amazed at how the internal engine sound travel thru the stick..hoefully that will help u pin pont the ticking noise..

Originally Posted by turboawd

another is to take a piece of radiator hose, like 3/4 diameter or so, and stick one end on your ear. use the other to probe where the sound comes from. works pretty good.