philj

Hi Y’all,

Longtime reader, first time poster.

I am interested in your help identifying the sounds from the rear of my 2001 996 Turbo with about 92k miles on it. Any thoughts?


Thanks in advance,
Phil

Third-Reef

The infamous "Mezger rattle". Better sell it now, to me now for 50% of market value before its too late.

"02996ttx50

i have a mezger motor with 150k miles and it sounds a lot "better" than that! i dunno, man..i'd try 5/50 M1 on your next ( like yesterday! ) oil change, see if that helps.

mffarrell

A box of marbles?

Macster

Could be anything from nothing (much) to worry about or it could be something (much) to worry about.

The noise could be from a number of sources/locations. Could be a water pump or another accessory drive. Could be a leaking exhaust (the turbos are sealed to the exhaust with metal o-rings and if these aren't replaced when the exhaust is apart the exhaust can leak). Could be something loose in the exhaust. Or something from inside the engine.

My best advice -- and this is what I've always done when my Turbo has made a noise that I deemed new and needing looking into -- is get the car to a qualifed shop for a professional's expert opinion.

Based on my experience the tech will get the car in the air and he -- and maybe another senior tech -- will carefully search out the source, at least the location, of the noise. Once the location and even the source is known you can proceed from there.

Berra

Yeah that's about to blow up! That and those pesky overrevs...ugh the world wide horror for Porsche owners.

Merry Christmas!

Kevin

Did you guys see the bolted shield at 57 seconds.. Is it rattling or amplifying the IMS rattle? As mentioned by 02996Xtt run Mobil 5W50

RngTrtl

How would the IMS rattle on the Mezger motor? It rides on journal type bearings...

mbaran

I think everyone in this thread is giving OP a hard time, but I can't be positive.

RngTrtl

sadly the mods let a lot of nontechnical banter persist on the forums. You just have to filter them out.

32krazy!

the chains ride from the ims up thru the cams and ride against chain tensioners that are a hardened plastic type of material. as they wear down they allow the chains to rattle more and more.

"02996ttx50

no sh*t!? so THATS it. good info.

Third-Reef

OP, google "mezger rattle" and make your own opinion.

RngTrtl

Cam chains and tensioners makes sense.

993GT

ex-rally car? interesting..