Is there a torque spec on the belt adjustment bolt? 1999 tj 4.0?
If not anyway to gauge enough tension?
If not anyway to gauge enough tension?
Is there a torque spec on the belt tensioner adjuster 1999 TJ 4.0
- Thread starter 99greenTJ
- Start date
I didn't know the needed numbers or I'd have posted yesterday but checking the tension of the actual belt instead of the adjustment bolt is what I figured should be done.
For some reason I was kinda thinking about twisting the serpentine belt between pullies but maybe that had something to do with my VW timing belt a couple decades ago.
Hey! For a 1999 TJ 4.0, the torque spec for the belt adjustment bolt is 30-40 ft-lbs. If you don't have a manual, you can use the deflection method: press down on the belt with your thumb and aim for 1/2" to 3/4" of deflection.
Thanks, this is the first car I have serviced that didn't have a spring loaded type adjustment.
Forgetting about those 50's, 60's, 70's cars, I have worked on!
Forgetting about those 50's, 60's, 70's cars, I have worked on!
I've never seen a spec for the adjustment bolt torque in any FSM where the TJ uses an adjustment bolt. The FSMs state that the bolt should be tightened till the belt reaches the correct tension.
I have a Krikit II belt tension gauge that I use to check my belt tension.
here's one...
https://www.amazon.com/Continental-Elite-09002-Krikit-Tension/dp/B004QIC2NK/?tag=wranglerorg-20
I have a Krikit II belt tension gauge that I use to check my belt tension.
here's one...
https://www.amazon.com/Continental-Elite-09002-Krikit-Tension/dp/B004QIC2NK/?tag=wranglerorg-20
Correct I just changed the belt on my 1999 4.0 with AC. Used the 30-40ft-lbs and the belt would occasion squeak on cold start. I gave it a few more spins and all good now.
I just assumed that torque spec was for the 15mm bolt holding the pulley assembly to the adjustment rod.
That much torque on a belt seemed a bit much?
Good to hear real world experiences.
That much torque on a belt seemed a bit much?
Good to hear real world experiences.
I bought an expensive Burroughs gauge for serpentine adjustments. I found that that cranking down the adjustment rod to get the factory TJ spec's resulted in a super tight belt likely to destroy bearings. The old rule of thumb (literally) applies. Moderate thumb pressure halfway between pulleys for 1/4" deflection. 35ft lbs is correct for the pulley bolt to lock it down and the idler pulley.