Pulley issue on alignment - JeepForum.com
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post #1 of 5 Old 11-24-2021, 08:03 PM Thread Starter
CoachBC
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Pulley issue on alignment

Restoring a 1980 CJ7.
Putting in a rebuilt 360
Water pump pulley is not lining up with crank pulley. Water pump pulley is about 1/4” too far in toward block. I know you can shim it out but what’s the issue? Everything is original except water pump was replaced. Is there different water pumps for this engine?

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post #2 of 5 Old 11-25-2021, 12:56 AM
BagusJeep
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There are multiple water pumps and pulleys over the years for an AMC V8, did you check the old and new side by side?

If it is only a 1/4" I would make a shim for the pulley.

BagusJeep lives in Bali with far too many 4x4s:
1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
1980 Land Rover Series III 109" troop carrier - ROVER
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post #3 of 5 Old 11-25-2021, 06:02 AM
keith460
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I ran into the same issue with a new replacement water pump for the old 258 I6 engine. Kept rolling the V-belt over until I made a short puller to pull the pressed on flange out some so the pulley would be in correct alignment. Problem solved.
Don't shim the pulley flange, pull it or push it in until it is aligned. They are a press fit onto the shaft.


pump-hub-puller.jpg

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post #4 of 5 Old 11-25-2021, 03:32 PM
Girth83
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I found a different pulley on Ebay for my 258. Previous owner had a 1/2in spacer between pulley and pump flange, and they were still running the ALT belt in the wrong/wider groove to make it work. When I put in a new water pump, it made the problem even worse. The "new" and shorter pulley sorted it out, and put the belt in the correct groove. I didn't have enough shaft on the pump to move the flange, but that does seem to be the easy fix, if you have a smaller misalignment.

40yrs of who knows what parts being swapped around, and then new parts assembled to whatever spec, do what you gotta do.
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1982 CJ5 258 T176 D300 D30/AMC20 2.72s
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post #5 of 5 Old 11-25-2021, 07:14 PM
80cj
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Quote:
Originally Posted by keith460 View Post
I ran into the same issue with a new replacement water pump for the old 258 I6 engine. Kept rolling the V-belt over until I made a short puller to pull the pressed on flange out some so the pulley would be in correct alignment. Problem solved.
Don't shim the pulley flange, pull it or push it in until it is aligned. They are a press fit onto the shaft.


Attachment 4019347
Roger that Keith. That's the way to do it. As you say, the flange is just a press fit.
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