Finished Clutch / IMS Job, now have scary mystery squealing noise - Page 3 - 986 Forum - The Community for Porsche Boxster & Cayman Owners

black_box · 08-29-2012, 05:40 AM

Quote:

Originally Posted by Topless

Thinking out loud... If a chain tensioner became hyper-extended and was stuck beyond it's normal range of travel due to movement during the IMS retro, would it cause a nasty noise like that? My brother developed a squeal on his 99 and it was worn out chain tensioners.

I've been thinking about what you said earlier, Topless. What sort of noise did your brother experience, exactly?

Eric G · 08-29-2012, 05:44 AM

Since you are locked in at TDC, you stated you removed two chain tensioners...did you leave the IMS chain tensioner in place? Leaving this installed will still apply force to your cam chain and can cause the offset you are seeing. This is accessed behind the drivers seat and behind the AC.

IMO...you should remove that and see if this relieves what you are seeing. It will also ease installation of the IMS bracket when you go to button her up. Good luck...

black_box · 08-29-2012, 06:16 AM

Can this be removed even with the engine in the car? After all this trouble, I am wishing I'd dropped it altogether. (Actually wishing I'd left the engine well enough alone!!)

Topless · 08-29-2012, 10:16 AM

Quote:

Originally Posted by black_box

I've been thinking about what you said earlier, Topless. What sort of noise did your brother experience, exactly?

It was a squeal that was most noticeable when revving up from idle (loading the tensioners). When the chain tensioners were pulled, they were completely worn through.

Eric is right you still have a chain load on the ims. Replace the tensioners and you might just save her.

2000boxster986 · 08-29-2012, 10:57 AM

BB,
There is a lot of helpful information here... However you did see fresh rub marks on the old flywheel and engine case. Are you sure the fly wheel is on correctly and flush with main shaft? Any possibility the flywheel is not lined up with the guide pin? Just a thought...

black_box · 08-29-2012, 07:29 PM

no 2000boxster986, the flywheel was definitely on correctly -- I think the marks I saw were just from installation.

I have a brand new one in now and the squeak is still present.