Problems with the Engine Pulleys

[MoshimoGTP]

Yesterday i noticed than my GTP was making a ugly sound in the engine bay. I've checked it and noticed than the main pulley is brocken (bottom and big pulley taking the 2 belts SC&Acc), i dont know the correct name. The center of the pulley is a plastic material. Are a aftermarket replacement or lightweight replacement for this?? Or i need to go with the GM Dealer?.

Thanks



MoshimoGTP
97 WHITE GTP COUPE
1/8 mile time : 9.438sec, [email protected], reaction +.368

[cayton69]

that pulley is your crank pulley. i don't know if you can get an aftermarket pulley, but zzperformance will lighten the stock pulley. so it might be something that you need a dealer to do. i do believe if a different pulley is used, a CASE learn must be done. this takes a computer to do. if i were you, id see how much a dealer would charge to fix.

[GTPCatz]

the center of that pulley isnt plastic though
its metal.....so i dont know what your talking about

can you take a pic of it?

[MoshimoGTP]

The correct name of the broken piece is Crankshaft Balancer. GM Dealer says me that is the correct name and the price is $160+tax. By Internet, (gmpartsdirect.com) are in about $85+tax dlls. But i want to know if ZZP or other company make this balancer more lightweight or something to give more performance.


Thanx


MoshimoGTP
97 WHITE GTP COUPE

[GTPCatz]

no but the Bonnie is suppose to be stronger and last longer then the GP....look into replaceing it with one from the Bonnie.

[MoshimoGTP]

This picture (section inside the red) is from the part what i need (mine is broken). GM dealer says me it's part number : 12563267, some one can confirm me this info?.



Thanks a lot


MoshimoGTP
97 WHITE GTP COUPE

[MoshimoGTP]

UPDATE.

GM PART # 12563268 <-- FOR L67, 3.8 VIN 1
CATEGORY: Engine Crankshaft and Camshaft Balancer
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $148.42
OUR PRICE: $84.60
DESCRIPTION: BALANCER


THE other part number is for L36

[kilroypr]

That is the damper(Crankshaft Balancer). It has no plastic, It has 2 metal parts with a rubber interface between them. This is used to lower the engine vibration due to the cranckshaft rotation. To replace you would need a puller. I do not think a case relearn is necessary since if you install one that is ligther but has the same diameter you would be fine. It has a notch so it has a fixed position to install on the crankshaft and the cost for the OEM is around ~160. Is not that hard to install.

[MoshimoGTP]

Ok, in www.gmpartsdirect.com cost me 84.60 + shipping. 1/2 price less than the Dealer.

Another question Kilroypr. Why this pulley broken? Use? Race?. I have a photo of my broken pulley, i will submit it.

Thanx

[MoshimoGTP]

Ahh, and the pulley make a ugly noise with is idle. The mechanic says me than the ugly noise come from inside of the pulley (balancer), is that true?

Thanx a lot again! =)

[MoshimoGTP]

PIC UPDATE...

http://files.automotiveforums.com/ga...hp?photo=15941

[MoshimoGTP]

UPDATE BROKEN BALANCER PIC...

[MoshimoGTP]

WOOPS.... AGAIN...