It's an idler pulley, company is called Gates. Heres a link

http://www.ebay.com/itm/400331919901...84.m1497.l2649

 

great info

 

only issue with eBay is getting the seller to honor the warranty. Our vendor, Sewell Lexus, ClubLexus Price:$155.82 for the water pump. At least your backed up should it be a bad part of have premature failure. The other parts I wouldn't worry as much about.

 

Sorry for the dumb question. I want to buy the pump parts and have my local mechanic replace but have no idea what parts to order from Sewell I need from the list below.

Can someone help?

$154.55 : PUMP ASSEMBLY, ENGINE WATER [16100] x 1
$61.62 : PULLEY, WATER PUMP [16173] x 1
$2.38 : BOLT FOR WATER PUMP COVER [16193A] x 2
$20.53 : GASKET, WATER PUMP [16271] x 1
$44.44 : PULLEY SUB-ASSEMBLY, IDLER, NO.2 [16604] x 1
$205.14 : TENSIONER ASSEMBLY, V-RIBBED BELT RWD - REAR WHEEL DRIVE [16620] x 1
$205.14 : TENSIONER ASSEMBLY, V-RIBBED BELT AWD - ALL WHEEL DRIVE [16620] x 1
$1.88 : PLATE, IDLER PULLEY COVER, NO.2 [16659] x 1
$2.23 : GROMMET [99999] x 99
$0.55 : BOLT, FLANGE [99999] x 99
$1.07 : BOLT, FLANGE [99999] x 99
$1.24 : BOLT, FLANGE [99999] x 99
$0.72 : BOLT, FLANGE W/WASHE [99999] x 99
$0.59 : BOLT, W/WASHER [99999] x 99

Thanks

 

$154.55 : PUMP ASSEMBLY, ENGINE WATER [16100] x 1
$44.44 : PULLEY SUB-ASSEMBLY, IDLER, NO.2 [16604] x 1

This is the pump and idler pulley

 

Thanks ibidu1 and for bringing the water pump to my attention from the other thread.

So the existing larger pulley and gaskets could be reused?
$61.62 : PULLEY, WATER PUMP [16173] x 1
$20.53 : GASKET, WATER PUMP [16271] x 1

Thanks again.

 

I'm glad it made people more aware of the situation.

You can reuse the pulley, and the water pump gasket comes the water pump kit #16100

If you wanted to go all out you can replace the tensioner, but those are $200 bucks

 

Thanks! Just ordered the kit + pulley sub-assembly for $200 + 3 gallons SLL coolant.

 

Thank you ibidu1! I just ordered the pump and the belt on ebay for my GS300. I have to change my thermostat and felt that it was a good way to get this done as well. I did not order the pully, is it recommended that I purchase it?

 

You can reuse the pulley, just clean it

Also just make sure to use blue loctite on all the bolts.

 

What is blue loctite and how do you apply it? By the way, thanks for the help.

 

Loctite is a thread locker, it helps prevent bolts from backing out from vibrations. You have three strengths. Since there's lots of vibrations in the water pump and engine block its best to use thread locker. A tiny drop on each bolt is enough. You can get them from any auto parts store

Blue- Strong, but easy to disassemble / work with
Red- More of a permanent application
Green- good for heat applications, stronger than red.

 

Thank you very much I will give everyone a heads up of how it went on the 300!

 

Great, goodluck! Are you doing the job yourself?

 

Great info here