3rd Gen Toyota Tacoma V6, how to replace Tensioner Pulley Bearings and Idlers #2 and Idler #1

Tools:
Breaker bar

14mm socket (for pulleys)

12mm socket (to remove oil cooler with 2 nuts and 2 bolts)

A Torque wrench (to tighten Idlers #2 and Idler #1)

And whatever extensions and adapters you might need





●First remove the serpentine belt. By turning the tensioner with the breaker bar and 14mm socket, untill serpentine belt is loosen. **<<<Have ready an allen key (5mm i think or bigger) to hold the tensioner spring, BEFORE REMOVING THE SERPENTINE BELT. Put the "L key" at the bottom holding hole>>>**
And
Remove the serpentine belt by wrapping it around the fan, 1 blade at a time. Untill completely out.



●Removing idlers #2 are self explanatory.

●To remove the Tensioner Pulley, the bolt is reverse threaded. So with the breaker bar turn the bolt forward or "Clockwise" like if you were to tighten a normal bolt.

●To remove Idler Pulley #1 the Oil Cooler is on the way for Pulley #1. I had to remove the Oil Cooler, it has 2 nuts at the top and 2 bolts at the bottom, 12mm socket needed..



I put a towel, to protect the oil cooler from getting dirt inside.



Oil Cooler Gaskets, I think they Cannot be reused. They need to be replaced.

●Oil Cooler Gasket
Part Number: 15785-31060

Oil Cooler Gasket
Part Number: 15785-31050

●To replace the Tensioner Pulley Bearings, I hammered the bearings out.



●To remove the middle Sleeve Bearing from the 2 bearings, I hammered it with a 10mm Deep Socket. To only hit the sleve bearing



●Replacing the bearings on the Tensioner Pulley, since theirs no replacement for the pulley. I bought them at Grainger Store, and chose to pick them up in person the next day.

The bearings are:
NTN Radial Ball Bearing: 6203, Dbl Sealed, Non-Contact Seal, 17 mm Bore, 40 mm OD, 12 mm Wd
Item
6L025

Mfr. Model
6203LLBC3/L627

Website:
https://www.grainger.com/product/NT...hBar=true&searchQuery=6L025&suggestConfigId=1





●To install the 2 new bearings I used
MADDOX Bearing Race and Seal Driver Set, 10-Piece





●After first installing the 2 new bearings, I then reinstall the original Sleeve Bearing. I used the 10mm deep socket (you can use whatever works best)


OR


●First reinstall Idler #1 BEFORE the Oil Cooler.

Idler #1 Bolt torque spec:
40ft-lbf


●After installing Pulley #1, now you can install the Oil Cooler.

●Clean the oil cooler with a dry clean rag, before reinstalling the new gaskets. Lubricate the new gaskets with engine oil. I got some from the engine oil DipStick and transfer it with your fingers or a clean towel....

●Don't forget to replace the gaskets With new ones.

Oil Cooler Gasket
Part Number: 15785-31060

Oil Cooler Gasket
Part Number: 15785-31050



2 bolts and 2 nuts torque spec at: 15 ft-lbs.



I just tightened by hand, because my torque wrench goes down to only 20 ft-lbs.

●Installing the Tensioner Pulley, I couldn't find the torque spec. I just tighten the bolt untill the spring tensioner started to move (I apologize if im mistaken on these) REMEMBER IT IS REVERSE THREADED.

●Idlers #2 and Idler #1 toyota part numbers:
Idler Pulley Sub-Assembly #1
Part Number: 16603-0P030

Idler Pulley Sub-Assembly #2
Part Number: 16604-31030



●Installing Idlers #2, with the torque Spec: 32 ft-lbf


●installing the serpentine belt


●Bleed out any air from the coolant, because the oil cooler was opened (the oil cooler uses coolant).

I used a funnel that helps to prevent spills when bleeding the coolant. I reccomend it is pretty cheap on Amazon, for like $20...
EPAuto Spill Proof Radiator Coolant Filling Funnel Kit

 

Hey I just did this last weekend, only difference is I only did the tensioner and used a vice instead of a hammer

6203 size bearing for the tensioner.
OEM is a NSK 6203DUL1B

 

Nice… so to remove pulley 1 behind the oil cooler mount you just need to take the top part off? That’s not too bad.

 

Excellent write up! Thanks for sharing.

 

Excellent write up, thank you!

How many miles on the truck?

Did you do this bacause they were getting noisy or as preventative maintenance?

 

Thank you for this guide, including part numbers. I'm sure eventually I'll be performing the same maintenance.

 

They were getting noisy

 

Great write up thanks for sharing