Re: [Amc-list] Serpentine Belt Question

[Jim Blair <carnuck@xxxxxxxxxxx>]

That's a round robin's barn way of saying that the offset of the 258/4.2L crank serpentine belt is 3/8" further forward than the 4.0L setup!

Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10
From: Frank Swygert <farna@xxxxxxx>
Subject: Re: [Amc-list] Serpentine Belt Question
To: amc-list@xxxxxxxxxxxx, piper_pa20 <piper_pa20@xxxxxxxxxxx>
Message-ID: <47EB9C61.5000901@xxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
 
Been too busy with other things over there -- didn't see the Q. 
There's no difference. The 4.0L crank end is 0.30" shorter, but the 258 crank end is the same with V or serp belt. Even if the crank end was/is shorter, it won't matter. The balancer will still pull up on the crank correctly. 
 
The 258 serp balancer won't work for a 4.0L, and vice-versa, by the way. The outer ring (pulley) is the same, but reversed. 4.0L has about a 1/4" wide flat on the outside, 258 on the inside. The belt doesn't run on the flat, so it's 1/4" closer to the engine on the 4.0L. 
 

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