LBZ: Duel cp3 idler pulley

PIG

favorite mistake
Aug 2, 2010
70
5
8
central PA
Does anyone know the size or part number for the 2 larger idler pulleys
f1ba7e6d3294e4179d0faccdd5afa572.jpg
 

Harbin_22

Active member
Dec 4, 2010
3,858
7
38
Southern Indiana
I got mine from PPE. I couldn't source them anywhere else. There is a pulley for a power stroke that is close but a little smaller diameter wise.
 

TheBac

Why do I keep doing this?
Staff member
Apr 19, 2008
15,310
1,599
113
Mid Michigan
Kinda looks like the idler pulley I had to replace on my son's Aurora 3.5 a few weeks ago. Just sayin'......
 

new york lly

I really do care!!
Feb 8, 2014
87
0
0
Buffalo NY
So ppe's website has an install PDF for lbz/lmm that shows 1 pulley...this is the way mine is set up..I ended up having to replace that pulley(it's the larger pulley below the ac compressor) w/ a 100mm gates pulley from Napa part # 38002...
 

JoshH

Daggum farm truck
Staff member
Vendor/Sponsor
Feb 14, 2007
13,597
626
113
Texas!!!
There is a gates idler pulley that you can use. I don't remember the part number, but you can Google and find a chart. The only thing you won't get is the fancy spacer PPE gives you with the dual cp3 kit. I want to say the one you want is 90 mm OD.
 

othrgrl

Diesel Addiction Owner
Mar 10, 2008
2,149
2
38
Wilmington NC
www.mydieseladdiction.com
Bringing this back up from the dead for future reference:
Pulley: Gates or AC Delco part #38002 is the 100mm pulley that PPE uses, it has a 17mm ID bearing
ATI Products spacer part number 915993 will space it .35" and bush it down for the 10mm bolt like the PPE spacer
Or you can use Gates part # 91051-15 bushing to bush it to 10mm and a spacer to get the correct offset.
Or you can use an LML shouldered bolt part #11515769 so no bushing is required, but you would still need a spacer to correct offset.

I need 2 of these setups for the belt driven air compressor setup on my LMM and am going to use the ATI spacer and the LML bolt so the bearing is basically bushed on both ends. To play with belt tension you can find larger and smaller diameter idler pulleys on the Gates site and most are 17mm ID bearing. Gates 36299 is 90mm OD and comes with a spacer and bolt that I think will bolt right up and work.
 
Last edited:
  • Like
Reactions: gmduramax