Idler Pulleys

I purchased my 2004 Toyota 4runner v6 4.0 new and have had excellent service from it. No issues except normal maintenance. It now has 165,000 miles and the pulleys are starting to squeak.

From what I have been reading I need the following replacement pulleys.
2 - Gates 36173
1 - Gates 36174

I can not figure out which pulley I need for the Idler Tensioner pulley. I have read some have used 36174 and then altered it a little. Is there a Bolt on pulley replacement? Will the OEM 16603-0P030 bolt right on?
 
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I purchased my 2004 Toyota 4runner new and have had excellent service from it. No issues except normal maintenance. It now has 165,000 miles and the pulleys are starting to squeak.

From what I have been reading I need the following replacement pulleys.
2 - Gates 36173
1 - Gates 36174

I can not figure out which pulley I need for the Idler Tensioner pulley. I have read some have used 36174 and then altered it a little. Is there a Bolt on pulley replacement? Will the OEM 16603-0P030 bolt right on?

Not enough info, V6 or V8?
 
Found whole OEM Toyota kit for $110

Package includes:
Belt Tensioner ×1 16620-31013
Belt ×1 90916-02571
Idler Pulley× 2 16604-31020
Idler puller x 1 16603-31040

Belt Tensioner Kit 16620-31013 7PK2120 For Toyota Tacoma 4Runner 2005-2015 4.0L | eBay

Ordered the inner and outer plates in case I need them.

Part No.: 16649-31020
2x - PLATE, IDLER PULLEY.

Part No.: 16659-AD010
3x - PLATE, IDLER PULLEY

I’ll give an update when I get them installed
 
Last edited:
Found whole OEM Toyota kit for $110

Package includes:
Belt Tensioner ×1
Belt ×1
Idler Pulley× 3

Belt Tensioner Kit 16620-31013 7PK2120 For Toyota Tacoma 4Runner 2005-2015 4.0L | eBay

Ordered the inner and outer plates in case I need them.

Back plate
Part No.: 16649-31020
PLATE, IDLER PULLEY

Front plate
Part No.: 16659-AD010
PLATE, IDLER PULLEY

I’ll give an update when I get them installed

This package worked great along with the plates.

The Idler tensioner was a major pain in the butt to install. The bottom rear compressor bolt was a major pain.

IMG_0171.jpg
 

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