DIY Belts?
#3
Lexus Champion
Thread Starter
Uh, I think I got that part down. Was looking more for info like how you release the tension off of the belts. Is there a spring loaded tensioner on an idler pulley or does the alternator or another accessory pivot?
#4
Moderator
Alt and P/S have the tension adjust points. If you have this type, I would suggest that you get a belt tension gauge, before you mess with them.
Serpentine belts which bend and snake, instead of running at the circumference (inside edge only), have a tensioner pulley. The spring maintains the proper tension, so it is very safe to replace them on your own ... other than remembering how the belt is routed. Relieving the tension with a ratchet or breaker bar, produces enough slack to slip the belt off.
Salim
Last edited by salimshah; 11-06-10 at 12:25 AM.
#5
Lexus Champion
Thread Starter
Ended up just doing the outer belt (the one that runs the alternator and AC). The other one was a brand new aftermarket belt that did not seem to be slipping so we left it alone. The one we replaced was also a brand new aftermarket belt and just like we have seen on other Lexus models, slipped even when tight. No, you don't need to write down the belt routing, it only goes over 3 pulleys with no bends. Yes, you use the alternator to tension it. Loosen the pivot blot on the alternator. Loosen the lock bolt on the alternator. Use the jam nut on the alternator to tighten or loosen the tension. Was able to get to the bolts with a socket wrench and a couple extensions. I think the bolts were 10mm & 12MM. Had to take off the plastic shield underneath and come from the bottom to get to the locking bolt. Sucked, but very doable if you have patience.
#6
How come you had to replace the belts? Miles on the RX? Slipping, Squeaking?
#7
Lexus Champion
Thread Starter
https://www.clublexus.com/forums/5850476-post9.html
OE belts actually cost a few dollars less than getting them from Autozone, so there is no reason to screw around with aftermarket belts.
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#8
Pole Position
The attached SM exerpt for the 3MZ-FE engine should provide enough information to adjust your belts correctly. This is a 3.3L engine as used in a 2005 RX330. Note the distinction between new and used belts is measured in minutes for purposes of tension adjustment.
#9
Thanks for the pdf! Good stuff.
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TunedRX300
RX - 1st Gen (1999-2003)
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10-30-20 07:18 PM