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Unread 02-11-2013, 04:12 PM   #1
x1n54n3x
Registered User
1998 XJ Cherokee 
 
Join Date: Mar 2011
Location: Mammoth Lakes, CA
Posts: 74
Serpentine Belt Tensioner

I recently blew out the tensioner pulley on my 94 5.2- simple, it's not the first time I've had to replace a pulley. Pulley- ~30 bucks, new belt (mine was a little worked) ~45 bucks. I replace everything and once I get the belt where it's supposed to be, the tensioner pulley isn't even keeping tension. It's as if the belt I was given was about an inch too long. Or the pulley I've replaced the broken one with too small in diameter. While I've been screwed by the guys at the parts store before, this seems pretty basic.

Can the tensioner be adjusted or is that the root of the problem in the first place- the tensioner went bad, caused the belt to work the pulley, thus destroying the pulley and belt in the process? Let me know what you guys think- it's as if my ZJ doesn't want to continue it's glorious life in the mountains or something.

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Unread 02-11-2013, 05:12 PM   #2
newfieZJ
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1995 ZJ 
 
Join Date: May 2008
Location: , Alberta
Posts: 6,385
Tensioner can't be adjusted , however I have had great success fixing them pretty easily . Remove it . Pin it to a vice , hit the spring area with PB blaster , work it back and forth 25+ times . Lube it up with fluid film , wipe it down , re-install it , be sure all pulleys are clean , done . Did this on my Black 5.9 3 or more years ago , not a squeak or squeal since . Did it to my 95 5 years ago . Just did it to my White 5.9 when I did the waterpump . Had to do it to a jeep I flipped . Worked every time .

If you don't have a vice , leave it on the jeep . Do the same as said above . Never did it this way but should have much the same effects .

I think the corrosion builds up where it pivots and stops the tension in the spring from doing it's job . It really helps bring life back to what seems a worn out part .

Did you get the right belt ? That's more than I can say right now . If you have the brand name and part number , then I would know for sure .
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Unread 02-11-2013, 07:51 PM   #3
x1n54n3x
Registered User
1998 XJ Cherokee 
 
Join Date: Mar 2011
Location: Mammoth Lakes, CA
Posts: 74
Thanks newfie, I'll head to the store tomorrow to pick up some blaster- I don't have a vice so I'll have to let you know how this turns out leaving it on the block.
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