2.5 Pulley / Serpentine Advice - JeepForum.com
 2Likes
  • 1 Post By mukluk
  • 1 Post By Jonny Jeep
 
LinkBack Thread Tools
post #1 of 10 Old 03-21-2020, 05:43 AM Thread Starter
ozzyjeep69
Registered User
1998 TJ Wrangler 
 
Join Date: Mar 2020
Posts: 31
2.5 Pulley / Serpentine Advice

Hi all. I have a 98 2.5 RHD, been sat in a field for years. New to TJ's.



The serpentine belt has had it, and all the pulleys are rusty as hell. Im going to replace them all.



Ive hunted the forums, and looked / googled for ages at all the pics of the serp routing, pulleys etc. and a lot are similar, but none are exactly like mine.


I dont have A/C, but I do seem to have a pulley on a bracket what looks like where the AC compressor should be.



Can anyone advise what part # for this pulley? Its sort of a big idler I think..?



I guess also I need a belt sized for an engine "with AC"?



Also do you think I should replace the entire alternator or can I just change the rusted out pulley on the front?



Thanks!

Attached Thumbnails
2.5-serp.jpg  
ozzyjeep69 is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 03-21-2020, 05:57 AM
Arty McGeep
Registered User
 
Arty McGeep's Avatar
2001 TJ Wrangler 
 
Join Date: Nov 2019
Location: albuquerque
Posts: 74
Garage
Hello. Changing just the pulley on the alternator looks like it might be rather difficult. I probably wouldn’t try it. You might just try taking the belt off and cleaning up the grooves on the pulley with a wire brush. Check to see that the alternator turns free by hand. If it does, I’d just run it. I’d be more worried about the frame underneath the Jeep. How does that look?
Arty McGeep is online now  
post #3 of 10 Old 03-21-2020, 06:35 AM Thread Starter
ozzyjeep69
Registered User
1998 TJ Wrangler 
 
Join Date: Mar 2020
Posts: 31
The frame is ok, just some surface rust. Pretty common here in the UK given its always pissing with rain!
ozzyjeep69 is offline  
 
post #4 of 10 Old 03-21-2020, 08:54 AM
TJ4Jim
Registered User
1999 TJ Wrangler 
 
Join Date: Nov 2013
Location: Brookings
Posts: 789
I have a 99 TJ with the 2.5 and looking at your setup it looks to me like it may have had AC originally because the large pulley in the upper left is like nothing I have ever seen. Someone may have eliminated the compressor and installed a pulley in it's place rather then using the AC delete belt. See the diagram for a 98' below. I would just order a non-AC belt and eliminate pulley.
Attached Images
 

If you come to a fork in the road take it.
TJ4Jim is offline  
post #5 of 10 Old 03-21-2020, 02:34 PM
Jonny Jeep
Web Wheeler
 
Jonny Jeep's Avatar
1997 TJ Wrangler 
 
Join Date: Feb 2007
Location: Manchester
Posts: 6,369
It seems the 2.5L RHD has same routing as the 4.0L RHD. The routing is correct. Parts list shows the same belt routing diagram for both 2.5 and 4.0 RHD.


Here's a pic of the decal that would have been on the original radiator.
Attached Images
 
Jonny Jeep is offline  
post #6 of 10 Old 03-21-2020, 04:41 PM
TJ4Jim
Registered User
1999 TJ Wrangler 
 
Join Date: Nov 2013
Location: Brookings
Posts: 789
Quote:
Originally Posted by Jonny Jeep View Post
It seems the 2.5L RHD has same routing as the 4.0L RHD. The routing is correct. Parts list shows the same belt routing diagram for both 2.5 and 4.0 RHD.


Here's a pic of the decal that would have been on the original radiator.
I agree but why is there a pulley where the compressor should be on the 2.5

If you come to a fork in the road take it.
TJ4Jim is offline  
post #7 of 10 Old 03-21-2020, 05:27 PM
mukluk
Web Wheeler
 
mukluk's Avatar
2000 TJ Wrangler 
 
Join Date: Oct 2010
Location: Clyde
Posts: 5,740
The alternator on the RHD version is tucked lower/closer to the block to provide clearance for the steering shaft, thus placing its pulley too low to use the standard non-AC belt routing found on LHD models. That's why you have the additional idler pulley where the compressor would normally sit.

From what I can see of the idler in question it appears to have only some minor surface rust. I'd be inclined to just clean it up and replace the bearing if it were mine.
TJ4Jim likes this.

2000 TJ SE
2005 LJ Rubicon
mukluk is online now  
post #8 of 10 Old 03-21-2020, 06:19 PM
mukluk
Web Wheeler
 
mukluk's Avatar
2000 TJ Wrangler 
 
Join Date: Oct 2010
Location: Clyde
Posts: 5,740
Looks like the idler should be part number 4792112AE, or 38042 for aftermarket (90mm diameter). If interested in replacing just the bearing, it should be a 6203-2RS.

2000 TJ SE
2005 LJ Rubicon
mukluk is online now  
post #9 of 10 Old 03-22-2020, 03:37 AM
Jonny Jeep
Web Wheeler
 
Jonny Jeep's Avatar
1997 TJ Wrangler 
 
Join Date: Feb 2007
Location: Manchester
Posts: 6,369
Quote:
Originally Posted by TJ4Jim View Post
I agree but why is there a pulley where the compressor should be on the 2.5

Mukluk, explained it well except the alternator is slightly higher rather than lower. These pictures show my 4.0L, with the belt removed, compared to a LHD 2.5 pic I found. As you can see the non AC RHD has the same idler pulley where the AC compressor would be. The idler pulley to the side of the alternator is lower down and closer to the alternator. With end on views, it's easier to see that the LHD non A/C routing can't be used on the RHD models.
Attached Images
   
TJ4Jim likes this.
Jonny Jeep is offline  
post #10 of 10 Old 03-22-2020, 04:50 AM Thread Starter
ozzyjeep69
Registered User
1998 TJ Wrangler 
 
Join Date: Mar 2020
Posts: 31
Great, sorted thanks.
ozzyjeep69 is offline  
Reply

Tags
serpentine

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome