m42 chattering!

[jwardmls]

i noticed today that my 318is is chattering pretty bad on the passenger side. sounds like its coming from the headers or the block. it has 225k miles on it so i know there will probably be some noise... is this one normal?

[Numark318i]

what kind of chatter?
Does it vary with Rpms?
Driving differently?

Have you replaced your timing chain tensioner? Those tend to make noise, i replaced mine at 150k. Im sure you might be due for that?
Might be the valves?

[jwardmls]

its at low rpms and it doesnt feel like its driving differently, but ive only had it for 2 months. the tensioner was the first thing i was going to replace because of the mileage, but this sounds like its coming from under the motor. i dont think its the valves unless one of them is bent or something. besides, it sounds like its further south than the valves. would a miss cause it to chatter?

[darkhorse737]

chatter? as in your exhaust pipe maybe touching the body?

[jwardmls]

yeah, its possible that the exhaust is touching the body... it kinda sounds like it might be. do you think it could be a bad motor mount causing it?

[darkhorse737]

...more like 1 or more of the rubber doughnuts that hold the exhaust pipe in place may have popped it's hooks or broke...