Serpentine belt Too Close to upper radiator hose -
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Unread 11-18-2014, 05:28 PM   #1
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1984 CJ7 
Join Date: Dec 2010
Location: Lake Elsinore, CA.
Posts: 15
Serpentine belt Too Close to upper radiator hose

I have an '84 jeep cj7. It has the 258 6 cyl. engine. It is a serpentine belt drive unit. The engine has an idler pulley on top of the alternator bracket where the AC pump would normally go. On the opposite side, there is an idler pulley just above the power steering pump. I guess this takes the place of the air injection pump that would normally go here. Now from here, the belt as you probably already know, goes from the power steering pump up to the idler pulley and then goes across to the idler pulley on top of the alternator and down to the alernator pulley and so on. My problem is the belt is very close to the upper radiator hose coming off the thermostat housing. As a matter of fact, there is already signs of the belt tearing into the hose just slightly. What I have done so far is put extra washers on the idler pulley bracket base on top of the alternator housing to raise it up. But with this modification, all 4 nuts show that the studs are only visibley half way through the nut when tightened all the way. This of course is very dangerous because vibration would surely loosen the nuts and send that pulley bracket flying around in the engine compartment and damage everything. I will change this back to the way it was before. I also in the past put extra washers in the pulleys themselves to bring the pulley's out alittle farther so the belt would have more clearence. But the problem with this is that the belt is slightly off kilt and will shred a strand or two of the belt. So I am asking here if anyone has had this same problem and if so, what did they do to correct it. Maybe a bigger diameter idler pulley? Thank you

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Unread 11-18-2014, 05:42 PM   #2
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1986 CJ7 
Join Date: Nov 2009
Location: California
Posts: 993
See attached pdf for belt routing from the FSM.
File Type: pdf 84-86 Belt Routing.pdf (472.7 KB, 39 views)
California 4.0 OBDII Engine Swap
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Unread 11-18-2014, 06:19 PM   #3
John Strenk
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1976 CJ5 
Join Date: Feb 2005
Location: Shalersville Ohio
Posts: 14,242
There is a special upper radiator hose that is used on engines with AC. It raises the hose up a little higher.
Maybe that would help

I'll see if the part number is still visible on my hose.
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