I have a nice whine beginning to develop from the idler pulley(s) on my Evo 8 so went to order a v-belt and replacement pulleys, which you would think would be an easy task, but I'm having a hell of a time determining the correct part numbers to order.

What I'm looking for is the idler pulley and the tensioner pulley on the v-belt (not the timing belt). But searching on lancershop and other sites I'm not entirely sure which PNs are the right ones, as some sites list them as a v-belt item then other sites list them for the timing belt etc.

Does anyone have a definitive list of the exact PNs needed to replace my serpentine (accessory) belt along with all idler and tensioner pulleys needed?

 

punch it into rock auto, it comes up. I just ordered a gates serp belt, my brand new dayco is chirping pos....

 

They only show an idler pulley but no tensioner. The only tensioner they have is listed as timing belt.

 

I'm in the same situation and this is what I've found.

Name CAPS/ASA Mitsu PN Alt MFG MFG PN Dealer RockAuto ORiley
Serpentine Belt 10040 Gates K060705 22
Serpentine Tensioner Pulley 48821Q MD374877 Gates 36238 40
TENSIONER,ALTERNATOR DRIVE BELT AUTO 14300 MD373939 Gates 38005 114 21*

* I think this just replaces the pulley, and not the sprung tensioner assy.

 

Try this:
https://www.evolutionm.net/forums/ev...ternative.html

 

Thanks for your input. Using your data I spent another hour or two tonight digging through online part cross-reference guides until my eyes were crossed. Then I just said WTF and pulled the trigger on the parts below from RockAuto:

GATES Part #36238 Tensioner Pulley
GATES Part #38005 Tensioner Pulley
ARMORMARK Part #K060705 Belt

I'll let you know if it all installs properly so that you don't waste as much time on this silly maintenance item as I have

 

I know I'm a year late on this one, buttt was curious if those PN's worked for you. Was hoping to replace just the two pulley's using the Gates part numbers you have listed.

Let me know if you don't mind

 

I wanted to follow up on this as I did pull the trigger and picked up some new pulleys as the bearings in mine had some play (it was a last ditch attempt at trying to get rid of some phantom knock...it didn't help). Below is the list I used for peoples' future reference. Everything fit as it should and seems to be working great after 200 miles.

From Napa
NAPA Part # 38005 - Serpentine belt Tensioner pulley (22$)

From Rock Auto
GATES Part # 36415 - Serpentine belt Idler Pulley (23$)
GATES Part # K060705 - Serpentine belt (9$)

 

I just changed both pulleys using these part numbers converted to Dayco part numbers and it worked a treat, done about 100km or so on them.

Didn't change the actual serpentine belt though. It has certainly seen better days and will need replacing soonish.

 

Sorry for the bump, but does anyone know the torque rating for the tensioner pulley?

These are the torque values I've found, but no one calls out the tensioner pulley bolt because the expectation seems to be that you're always replacing the whole assembly:
Auto-tensioner assembly bolt M8 24 ± 4 (18 ± 2 ft-lb)
Auto-tensioner assembly bolt M10 44 ± 10 (33 ± 6 ft-lb)
Idler pulley bolt 79 ± 5 (58 ± 3 ft-lb)

 

It's going into aluminum so I'd say a lower torque value than expected.