smartjay28

Hey all,
So it sounds like a spun bearing, clacking sound/tapping sound on the low rpm but not idle or high rpm.

I googled and checked the forum and it doesnt seem like the m112 are common with spun bearings. just for kicks, what else can this sound be? car has about 160,xxx miles on the clock. oil change on routine. Im going to check tom morning and ill post more info.

can someone post a picture from the underside with the oil pan off? im trying to see if i can tackle this myself. Most likely the bad connecting rod, bearings and maybe the crankshaft has to be swapped?

Thanks in advance!

Glyn M Ruck

This is the only bearing failure in recent times.

https://mbworld.org/forums/c-class-w...nop-noise.html

Good luck!

OneOfaKindTrini

.. Trade it in.

samaritrey

What year?

smartjay28

2002 c240

OneOfaKindTrini

.. Set it on fire.

Glyn M Ruck

^ is this a useful reply?

OneOfaKindTrini

It really isn't but repairing any engine with a spun rod is a headache not worth loosing sleep over.

samaritrey

I wish i was more mechanically inclined but a spun bearing is caused by a lubrication issue right? So in most cases not changing the oil enough or a level issue right?

Glyn M Ruck

This is likely a small end bearing failure. Yes Trey it's likely due to inadequate oil supply for whatever reason. Blocked oil gallery, fouled filter & stuck PR valve, neglect in general or over revving causing cavitation or breakthrough of the oil film.

Could also be severe overheating at some time.

smartjay28

it was the pully for the ac compressor haha. when it wobbled, it made a "spun bearing" sound.

thanks all!!

mskembo

That is REALLY good news Glad to hear you won't be setting your car on fire like Trini suggested.

smartjay28

its good that it isnt the engine, yet it will set me back 1500 for the compressor and labor haha.

thanks everyone for the suggestion!!

Glyn M Ruck

Good news!!!! Valeo compressor?

smartjay28

not sure. dealer quoted me 460 for reman compressor.