TCannons24

ok, so what I've got going on here is a noise id describe as a knock that occurs
1) Only when the engine is warm
2) Only at idle RPMS under 1k
3) Only when I first start the car when warm (gas station stops) or when I come off of the highway for an extended time

If I am sitting in traffic the only way I can avoid this noise is slightly getting on the gas and raising the RPM to about 1k. Any idea what it might be?

TCannons24

come off the highway *AFTER* an extended time on the highway

Prospeeder

Knock or rattle? If its more like a rattle, Timing chain tensioners will make bad noises and not tension the chain. The bores wear out and more oil pressure from higher rpms will quiet them down. The oil pressure is much higher cold than hot so that would make sense. The tensioner is on the end of the cylinder head, listen and see if the noise is from there.

Jaren Ortega

Is the tensioner at the top.of the engine cause that's where the sound is coming from

korbin brown

I have the same issue with my 2002 audi a4 1.8t of the knocking noise I have a hundred thousand clicks on the engine and Driveline I just got back from the shop about maybe a month ago and all of a sudden yeah my engine started clicking or making knocking noise and it seems to be top end but i don't know it makes the noise on idle and when its hot or cold and only at idle