Idler Pulleys for California Serpentine Belt - JeepForum.com
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post #1 of 14 Old 04-18-2019, 10:35 AM Thread Starter
mystert29
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Idler Pulleys for California Serpentine Belt

My 1984 CJ7 w/258 has the California specific serpentine belt setup. The idler pulley on the drivers side is P/N J3239821 and available from Crown. Is the pulley on the passenger side the same part or is it different? I am getting a squeak from the either the idlers or the fan clutch and wanted to replace them since they are 35 years old. There isn't a lot of information about these California specific serpentine belt setups.

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post #2 of 14 Old 04-18-2019, 11:23 AM
cpadget
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I was hoping to be of assistance. My '83 socal cj7 does not have that passenger side pulley, but rather the alternator in that spot. I have A/C and I'm guessing that's why it's setup different. I did, however replace that pulley on the driver side that you have circled, and your part number is spot on. I ordered it off Amazon, Crown part.
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post #3 of 14 Old 04-18-2019, 03:33 PM
LumpyGrits
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Yes, they are the same.
FYI-Crown is China CRAP!!
Give these folks a call.........
https://www.willysworks.com/

LG

Have'n you along, is like loose'n 2 good men
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post #4 of 14 Old 04-18-2019, 04:25 PM
scooby533
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I replaced the bearing in the pulley. I’ll circle back with a P/N, but it was a Napa P/N.

****** EDIT****** Napa P/N 6203-2RSJX
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post #5 of 14 Old 04-19-2019, 09:14 AM
cpadget
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Lumpy, Thanks for the link to "non" China crap. Quick question: I assume most of their items are used, coming off of donor vehicles? I too needed that pulley that we speak of, and a new one seems to be the best option given their shelf life.
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post #6 of 14 Old 04-19-2019, 09:58 AM
LumpyGrits
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I just replaced the bearing, when it became time.
LG

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post #7 of 14 Old 04-19-2019, 12:28 PM
cpadget
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I tried to replace the bearing as well. Amazingly it still had a number on it, but no one I talked to could cross reference it.
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post #8 of 14 Old 04-20-2019, 08:36 AM
LumpyGrits
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Originally Posted by cpadget View Post
I tried to replace the bearing as well. Amazingly it still had a number on it, but no one I talked to could cross reference it.
Go to a 'Bearing House'-Take it with you......
LG

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post #9 of 14 Old 04-20-2019, 11:26 AM
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Many times you can just swap an idler form another vehicle, too. As long as the bearing ID and the pulley OD is the same, it doesn't matter what vehicle it comes from. Working in the trucking industry I learned that more often than not you can use a pulley from a Cat on a Cummins on a Detroit. As long as that bearing is right, and the OD and groove count of the pulley is right, run it. No need to feel forced to use subpar Omix/Crown stuff if you can use Timken, National, etc.

Rick

1978 CJ5 5.0HO/T177/D300, '86 D30/D44 WT axles, 'glass body, 31x10.5 BFG A/T, TDK galv'd frame - DD and weekend toy


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post #10 of 14 Old 04-20-2019, 04:39 PM
scooby533
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My original bearing was an F.A.G / Canada bearing. Look at my edit above, I put the P/N in from Napa.

Shawn
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post #11 of 14 Old 04-29-2019, 08:52 AM Thread Starter
mystert29
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I ended up replacing the pulley with one from Crown. For reference has a Japanese NTN Bearing P/N 6203LU. It was interesting to inspect my original bearing. It was held in place by an internal snap ring and had a loose fitting spacer in the middle to fit the on the bolt. The pulley has the original jeep part number on it so I assume it original, maybe the bearing was replaced in the past 35years.
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post #12 of 14 Old 04-29-2019, 09:20 AM
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Quote:
Originally Posted by mystert29 View Post
My 1984 CJ7 w/258 has the California specific serpentine belt setup. The idler pulley on the drivers side is P/N J3239821 and available from Crown. Is the pulley on the passenger side the same part or is it different? I am getting a squeak from the either the idlers or the fan clutch and wanted to replace them since they are 35 years old. There isn't a lot of information about these California specific serpentine belt setups.
You don't have issues with overheating with that fan and no fan shroud? I'd be afraid of loosing a finger.

One of the best mods I did was putting in a Ford Taurus electric fan. A log more compact...moves a ton of air....

I run mine off a variable speed controller....DC Controls I believe is the manuf.


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post #13 of 14 Old 04-29-2019, 09:31 AM Thread Starter
mystert29
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On the freeway sitting in traffic on the way home the temp gauge creeps into the green section of the gauge a bit. A fan shroud is on my list of parts to get. Seems like I have HD cooling but not the HD cooling radiator. I have the fan clutch and 7 blade fan but not the offset cap radiator. I have been waiting to get the fan shroud because they are matched to the radiator I believe. I am debating getting the proper HD cooling radiator so its holding me up. Are the fan shrouds dependent on the fan diameter? According to this post there are a few different fan diameters-

https://www.jeepforum.com/forum/f8/w...oling-1369762/
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post #14 of 14 Old 04-29-2019, 05:11 PM
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Quote:
Originally Posted by mystert29 View Post
On the freeway sitting in traffic on the way home the temp gauge creeps into the green section of the gauge a bit. A fan shroud is on my list of parts to get. Seems like I have HD cooling but not the HD cooling radiator. I have the fan clutch and 7 blade fan but not the offset cap radiator. I have been waiting to get the fan shroud because they are matched to the radiator I believe. I am debating getting the proper HD cooling radiator so its holding me up. Are the fan shrouds dependent on the fan diameter? According to this post there are a few different fan diameters-

https://www.jeepforum.com/forum/f8/w...oling-1369762/
If you like to go through water, I'd ditch the belt driven fan and go electric....you can shut it off....and it frees up room.
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