illmaticnyc

i floored it after getting my rear cat delete.

then BAM. hear this repetitive smacking sound. what is it? pop my good and my fan belt is in shredded pieces twirling around.

didnt want to drive the car so had it towed to my buddies shop. what is the cost of replacement? also what ARE these pieces? i found them under neath as well

cm60k

I think its a Belt Idler pulley (Tensioner Pulley),, need to replace it with a new belt.......

ZAYED,,

illmaticnyc

anyone else know what part that is? have no idea.

btw i changed it all out. new tensioner and belt. 250 bucks

KJI3jflarryfe93

that's belt idler pulley sitting near wattahpump.
you need to pull out radiator to fit a new pulley.
bolt is a loooooooooooong type bolt

DRBC43AMG

The wallet looks like it is going to get a slimming diet real fast.
Wonder why the idler pulley broke without any prior warning. Usually they start making noise before doing the nasty break

cm60k

Agreed,,

also is there a good reason to suppose making the Idler pulley from plastic,....!?!

ZAYED,,

illmaticnyc

mechanic said the pulley seized and got ripped off from the friction of the belt. just ripped right off. shred!

KJI3jflarryfe93

scheize verdamt, you could have been in a real accident with your car not having throttle.
engine busted too aswell dubble eek!

illmaticnyc

thank GOD it was down the block from my house. amazing. i feel lucky

DRBC43AMG

If it happened just down the block, I hope you didn't WOT with a cold engine and mechanics.... That is NOT respect for an ageing AMG

illmaticnyc

dude no way!! cmon! u dont give me credit. it was on my way home. haha. car fully warmed up/

DRBC43AMG

Good then

KJI3jflarryfe93

is this damage something to expect if this belt pulley shreds in pieces?
or does it only happen on high mileage cars?

illmaticnyc

i think the bearings just went and the pulley just seized. key is to change the pulleys before this happens ideally.

DRBC43AMG

Probably something to check each time you have a service and when starting to wear, get it changed

illmaticnyc

do you think i could have bent anything inside the engine with the belt popping off like that? or do the valves run irrespective of the serpentine belt.

DRBC43AMG

Don't sweat around the colar. You cannot overrev the engine. Have you never heard of electronic rev cutoff? That's what saves over reving the engine

illmaticnyc

wouldnt the belt throw off the timing of the belts thus bending?

DRBC43AMG

NOOO! The timing chain is inside the block. The rubber serpentine belt drives the accessories on the front of the engine outside.

cm60k

Guys,, is there a way to pull out the idler screw without moving the radiator.....??





ZAYED,,

KJI3jflarryfe93

La habibi!

DRBC43AMG

I have read that it is possible but a PITTA. Better removing the radiator and while you are in there, check the water pump, remove crank pulley and replace with a lighter one, which gives better response

illmaticnyc

is this the same thing that prevented my car from over revving? my nephew shifted the car from d4 to 2nd gear while on the highway!! nothing happened.

DRBC43AMG

Sometimes electronics are more clever than the human brain. No way will the tranny downshift from 4th to 2nd is the speed or corresponding revs are too high, unless you are using a manual transmission in which case you are going to end up with some bent valves

ECTurboGSX

I didn't have to fully remove the radiator, but I did have to remove the fan shroud and the upper radiator support and pull the radiator up enough to tilt it forward a bit. It was very much a PITA.