change crank pulley

[gpman58]

i just got a new underdrive crank pulley for my 2003 grand prix se 3.1L and i was wondering if there is anything i should know before i start

[GTP Dad]

Not really just take your time and make sure you have the proper belt available.

Welcome to AF!

[BNaylor]

In addition to GTPDad's suggestion, the belt will need to be shorter and it's recommended to use a GoodYear Gatorback serpentine drive belt.

The balancer/pulley bolt is either 15 or 18mm. Be sure to use a 6 point socket and 1/2 " drive to loosen it. Also you'll need a harmonic balancer puller. Upon completion, the balancer bolt should be torqued to 110 ft-lbs.

Also if the new UD pulley does not come wth a 24X crank sensor ring, you will need to take it off the stock one and transfer it to new UD pulley.

I did my son's 3.4L Alero about 6 months ago and it can be an easy job, if you properly prepare, have the right tools and do the job right. Good luck!










Thrasher CAI, DHP v1.0 PCM, SLP Headers,
3.25 SC pulley, CAIT GMAF, 2.5 DP/Hi-Flow CAT,
u-bend delete, 160 TS, ZZP Stage 1 72mm TB,
TB spacer, MSD 8.5mm wires, Autolite 103,
Goodyear Gatorback Serp. & SC Belt,
Nitto NT555R Drag Radials
1/4 ET: 13.210 sec. @ 104.490 mph
0 - 60 ft: 1.945 sec.

[gpman58]

Originally Posted by GTP Dad

Not really just take your time and make sure you have the proper belt available.

Welcome to AF!

Thanks alot ill try it tomorrow. wish me luck

[gpman58]

Originally Posted by GTP Dad

Not really just take your time and make sure you have the proper belt available.

Welcome to AF!

somebody also told me that you might need to heat up the pulley. what should i do about that

[GTP Dad]

I don't know why you would but a propane torch should give you enough heat if you must. It should be a direct bolt on. You may have to tap it with a hammer to get the old on off but the new one should go right on.

[sweetgp07]

ive got a 2001 grand prix 3.1L and i am looking for overdrive pulleys...where did you get yours?

[BNaylor]

Originally Posted by sweetgp07

ive got a 2001 grand prix 3.1L and i am looking for overdrive pulleys...where did you get yours?

sweetgp07,

Sorry but please check the date of the thread and last post. This thread is over one year old and we prefer old threads are not resurrected. Feel free to start a new thread addressing your issue or question. Thread closed.