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. _________________________________________________________________ Windows Live Hotmail is giving away Zunes. http://www.windowslive-hotmail.com/ZuneADay/?locale=en-US&ocid=TXT_TAGLM_Mobile_Zune_V3 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://splatter.wps.com/pipermail/amc-list/attachments/20080327/50ebfa6c/attachment.htm _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list