Well I think the ims is going

[blue2000s]

Originally Posted by L Pettis

Ok I have a 99 2.5 boxster 59000 miles trouble free serviced every 5000 miles
untill the other day noticed at idle a rattle sounds like metal rattling against each
other. Not like a rod or main noise.Sounds like a wore out belt tenioner rattle but
inside the engine. No noise when cold and only at idle but seems to be inside
engine down low as far as I can tell so far.Appeared overnight as far as i can tell
I dont have alot of expertize on these engines . Alot of experice on 944 engines
great engines so I am not to happy with this design. OK whats it sound like IMS
bearing . I am not driving it now but do I check futher with the engine running
and chance it or do I just get ready to take the trans out and check? Thanks alot
far help with this matter

It's possibly a TO bearing. Does the sound go away when you press the clutch in?

[L Pettis]

No it does not change with clutch in or out .Also tried loading the trans alittle to see if it would change but it didnt.

[coreseller]

If it were me I would not start / run the engine any more, the bearing may seize like this one:

http://www.youtube.com/watch?v=LlWMlimt9w8&feature=related

IMS situation explained:

http://www.youtube.com/watch?v=xvLRMGs-Ti8

Good luck.

[70Sixter]

Not sure what part of Bama you're from, but Jake is in North GA, and I'd think about a little trip for the IMS upgrade even if your IMS turns out not to be the problem.

Better safe than sorry.

Good luck!

http://www.flat6innovations.com/