Tensioner pulley bearing

02 4.7

Looking for dimensions and/or part number for the OEM serp belt tensioner pulley bearing.

I believe the OEM bearing is made in japan by NSK.

Or if there is another NON chinese replacement bearing I will accept that as well.

 

Look on RockAuto.

 

Linking to this, just to complete the circle in case someone finds this thread later... https://www.tundras.com/threads/genuine-japanese-nsk-bearing-for-idler-pulley.118498/

 

Toyota doesn't sell the bearing separately sadly.

 

Here's a tensioner pulley that has a NSK bearing: https://www.rockauto.com/en/moreinf...OMCThBIlHndiD/ujzc8hlu+kMaDvRXjkStq7E7A8sPQ==

 

Interesting it doesn't cover 2006 trucks.

 

Might be an error on the listing? When I start the search with a 2006 that one still comes up.

 

It may just be setup by "exepcted year of manufacture". There's technically no '99 Tundra, but they definitely were building them in '99. Maybe they're shifted back a year, under the guise the production cycle started year prior. That's just confusing though, and my truck was made in the last quarter of 2006, so ....

It also doesn't include 2007 Sequoia, which I would expect would have the same bearing, given it basically has the same 2UZ-FE engine...

 

I saw that one when I was shopping. Saves 10 bucks over the one the entire assembly is from NSK and made in Japan. Note sure about it denoting smooth for the pulley, as the factory one is channeled for the belt. I decided if I was going through the trouble to get the good bearing I might as well get the entire assembly. autotechnia one could be made out of cheap pot metal, or the bearing could be NSK but not made in Japan. Funny enough, I remember seeing some of the pulleys on there being denoted as made of plastic. I probably just overthink it. The factory original I replaced spun just as freely as the new one.

 

Think you're confusing the two, idler is ribbed for the belt's pleasure and tensioner is smoov. The back side of the serp runs on the tensioner pulley.

Or maybe I'm dumb but I can't find the complete NSK belt tensioner assembly on RA?

 

I'm the confused one, my apologies. Shiftster linked a forum post asking about the idler pulley to this post about the tensioner pulley. I am speaking to the idler. I replaced the entire tensioner setup on mine with OEM, and the idler with the NSK linked in the other thread.

 

That's a crazy good deal if it's true. Even if I buy it just for the bearing.

The idler bearing was almost $50

Are we/you certain it's for the tensioner assembly for an 02 with the 4.7?

 

I thought I might add this too.

Part of the reason I'm replacing the bearing and not the whole assembly is because of how unimpressed I was with replacement.

I bought a new/rebuilt tensioner assembly from the dealer as a truly original unit is simply not available from the dealer or otherwise. Unfortunately after inspection I was extremely displeased with the fit, finish, the addition of plastic pieces, the design change, the smaller pulley. The installed bearing has literally zero manufacturer markings. But worst of all was the engagement between the bearing race and boss on the assembly.

Look at the difference between these two.



"New" reman from the dealer is on the right. Original from the factory is on the left.

The bearing on the reman has bearly and I mean bearly 50% contact with the boss. It simpler terms the bearing is 50% wider than the boss it rides on. And the fit between bearing and boss ain't exactly good either.

 

I'm pretty certain it'll bolt right up no issues, if I was looking to replace mine I'd be buying and trying this first.

That's a bummer to hear about your experience with the new(?) tensioner assembly and definitely something for the rest of us to keep in mind when R&R'ing this type of stuff. I skipped out on doing my pulleys last belt change.

 

I can't remember the details, but the new OEM tensioner is an improved design, I would install it and never look back. Keep your old one as a backup if you are worried about the new one. They have been around 2-3 years at least with no reports of a problem

 

its an improved design that also requires the a/c bracket to be replaced technically due to the smaller pulley.

 

https://cdn.discordapp.com/attachme...1062255798660649091/06_TSB_Drivebeltnoise.pdf

 

Thanks for this. I'm going to link this up over in the info dump thread, so I'm uploading this copy to the forum so it'll stay alive as long as the forum is around.

 

I thought the belt went on easier than I’d remembered with the old setup. SOAB! More parts to buy and work to do. Good thing is it seemed to get rid of the chirp and runs fine as is