Serpentine Belt Tensioner Replacement
- Thread starter jp213a
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
Are they supposed to come with the cover? The new one didn’t.
Edit add: the cover is a separate part -Idler Pulley Cover - Toyota (16659-50022). I assume this matches the latest idler pulley diameter size.
Last edited:
2001LC
SILVER Star
Idler pulley do have a front and back side. If oriented wrong, it will rub and damage pulley.
Last edited:
Also note the new replacement tensioner / pulley from Toyota OEM is a smaller pulley then seen on the older model 2UZ.
What I found to be strange was when I ordered the replacement pulley from Toyota they handed me a pulley the same size as my original. Then when I decided I had to replace the entire unit , I brought that pulley back and the full assembly they gave me had a smaller pulley .
I'm concerned the smaller pulley is causing my particular noise
I'm concerned the smaller pulley is causing my particular noise
Thanks! Great write-up. Just did mine. Did not need to remove the power steering pulley, just pulled off the whole unit with 3x 14mm? bolts accessed though the pulley.
cruiserpatch
Supporting Vendor
- Joined
- Nov 24, 2020
- Threads
- 115
- Messages
- 1,110
- Location
- Atlanta, Georgia
- Website
- www.cruiserpatch.com
I recently replaced my idler pulley, accessory belt, and tensioner pulley on my '99 LX470. When I took out the bolt holding the idler pulley in place (90105-10246) I noticed some metal shavings (threads) on the bolt. It was also much more difficult to remove the bolt than I expected. Sure enough when I looked inside with a flashlight, I found evidence of cross threading.
I was camping with some other mudders so I had to reassemble it at least to get me home. I was able to torque it to about 5 ft-lb but the threads are clearly destroyed. Can the receiver (the threaded hole) for the bolt be replaced or repaired somehow? If not, what are my options.
Thanks for any insight you're able to provide.
Patch
I was camping with some other mudders so I had to reassemble it at least to get me home. I was able to torque it to about 5 ft-lb but the threads are clearly destroyed. Can the receiver (the threaded hole) for the bolt be replaced or repaired somehow? If not, what are my options.
Thanks for any insight you're able to provide.
Patch
I had the same thing happen ,not sure if it was cross threaded or jus that little sleeve wears out. Metal shavings could be seen all around tensioner.
Your destined to replace the tensioner and pulley assembly.
2001LC
SILVER Star
If "idler pulley" bolt threads bad, replace bolt. Run thread chase restore tool in female counter parts threads. Torque to 27ft-lbf. If it then, will not take the full torque. The threads in female counter part bad, replace fan bracket. I've never seen these threads bad, but s%#t happens.
What I do see, is idler pulley install backward, or not seated properly.
What I do see, is idler pulley install backward, or not seated properly.
Last edited:
cruiserpatch
Supporting Vendor
- Joined
- Nov 24, 2020
- Threads
- 115
- Messages
- 1,110
- Location
- Atlanta, Georgia
- Website
- www.cruiserpatch.com
'99 LX470
I found a replacement Fan Bracket (PN 16307-0F010) but I would have to replace the bearing and accessories attached therein.
Do you know if anyone sells the parts for a fan bracket rebuild? If I can, I would love to save the $215 but I don't mind going OEM.
Per the FSM p. EM-13, I found the fan bracket but cannot find any particulars about the individual parts.
Fan bracket is not serviceable owing to the way the bearing is 'staked in' the back of the unit. Replace with new.
The 'Aisin' unit (plenty good) will run you about $100.00 shipped.
Last edited:
I ordered an idler pulley no. 2 from Impex and it fit properly.
Unfortunately, a little noise still from the tensioner pulley. Had hoped the 15-minute idler pulley job would do the trick.
I was in the same boat, I have truly replaced everything that spins under my hood and within the timing belt train with the exception of the AC Compressor. I still get an early morning, chirp chirp chirp, it drives me crazy. Once the vehicle is at operating temp it goes way but man it drives me crazy. I blame the belt tensioner, even though its brand newI ordered an idler pulley no. 2 from Impex and it fit properly.
Unfortunately, a little noise still from the tensioner pulley. Had hoped the 15-minute idler pulley job would do the trick.
^ I've had the same issue for the past year or so. It chirps for 5-10 seconds then all is right with it. I've checked everything except the tensioner. I remember the last time I swapped in a new tensioner it was different design than OEM so not sure, since its been a few years, if there was a part update from Toyota or not. But, assuming that's the problem child, the replacement has lasted a fraction of the miles the original tensioner did...
Yeah the newer tensioner when bought as an assembly seems to have a much smaller pulley that the original that was pulled off. I assume there is a change in design to make up for the smaller pulley since the belt size remains the same.
Per Onur @Beno when Toyota intro'd the 2UZ-FE in the USA built Tundra in 2002/2003 or there abouts, Toyota went from supplying Made in Japan tensioners being available to the USA fabricated variant being stocked at Toyota parts dept (along with most other front of motor parts like water pump, idlers, etc., etc.). So, just a guess on my part, but as sometimes is typical the OEM made in Japan parts seem to have better performance and durability than the superseded USA made parts...
