Underdrive Pulley
01-27-2010, 12:59 PM
#1
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Underdrive Pulley
Just ordered in the mrz underdrive crank pulley. I will also be doing my alternator pulley. If im not mistaken there is a Crank bolt that is needed to install the pulley. Does anyone have the size or part number for this. Also, what tensioner works best to rent?
01-28-2010, 07:11 PM
#5
^^^ Correct, replace the bolt. They are meant to be used once! Factory service manual specifies this. The part number is 1158912? -- crap the tag on my new bolt is torn at the end!!!!
Found my old picture:
https://www.cobaltss.net/gallery/fil...nce_pulley.jpg
https://www.cobaltss.net/gallery/sho...08&c=favorites
PN is 11589123...LoL
Found my old picture:
https://www.cobaltss.net/gallery/fil...nce_pulley.jpg
https://www.cobaltss.net/gallery/sho...08&c=favorites
PN is 11589123...LoL
02-07-2010, 05:28 PM
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Technically, you want make ANY...you are merely freeing up. As for example, it takes 10hp to turn the stock crank. The new one might take 5hp to turn.(Keep in mind these are BS numbers). You free'd up 5hp...so if your car was at 200hp...you'd be at 205. The engine itself isnt making any more...you're just seeing the increase due to the engine not having to turn a massive crank.
02-07-2010, 06:21 PM
#9
Technically, you want make ANY...you are merely freeing up. As for example, it takes 10hp to turn the stock crank. The new one might take 5hp to turn.(Keep in mind these are BS numbers). You free'd up 5hp...so if your car was at 200hp...you'd be at 205. The engine itself isnt making any more...you're just seeing the increase due to the engine not having to turn a massive crank.
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