GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

engine question

Old 02-22-12, 05:49 PM
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johnomac87
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Default engine question

Does anyone know what this part is (the silver circular thing behind the belt)? It is from a 2001 GS300 with about 198,000 miles.

It is starting to make a whirling noise when I put the car into drive. My mechanic says that I need to get it replace. He tells me that if I wanted OEM, I would have to replace the whole part for $350 (part only) or just replace the bearing with an aftermarket one. I just wanted to see if anyone has every replaced it or if it needs replacing at all. Thanks.

Old 02-22-12, 06:16 PM
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BiGEZ
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That would be the belt tensioner. Cost about $135. tensioner and pully OEM from Sewell Lexus brand new. It is probably the pully on the other end that is making the noise. You can get a brand new pully from Auto Zone for $20, it is east to change, 1 bolt in the middle. Remove the belt , replace the pully, replace the belt. 20 mins tops using a 14mm socket/ wrench.
Old 02-23-12, 12:48 AM
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johnomac87
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Originally Posted by BiGEZ
That would be the belt tensioner. Cost about $135. tensioner and pully OEM from Sewell Lexus brand new. It is probably the pully on the other end that is making the noise. You can get a brand new pully from Auto Zone for $20, it is east to change, 1 bolt in the middle. Remove the belt , replace the pully, replace the belt. 20 mins tops using a 14mm socket/ wrench.
Thank you for your response Bigez
But I don't think its a pulley as it does not have the belt attached to it. I reattached a different picture pointing at part that I am inquiring about. Thanks


Old 02-23-12, 05:10 AM
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SaiyanGS3
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I will have to take a look at my car to get a more vivid picture, but it isn't a pully or a tensioner. The tensioner is what you adjust to add/remove slack from the belt while replacing. Actually the tensioner is the part right in front (tad bit to right) of your "front of car" statement.
Old 02-23-12, 02:28 PM
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BiGEZ
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That is the tensioner, the pulley is attached to the other end with a 14mm bolt. You can get the tensioner and pully from Sewell Lexus for $132.00. I know I just bought one from them a few weeks ago. Easy to change. Remove the belt, upper and middle covers on front of the engine. 3 10mm bolts holds the tensioner to the front of the engine. Remove it and slap on the new one. I recently did it on my 01 gs300.
Old 02-23-12, 09:32 PM
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johnomac87
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Originally Posted by BiGEZ
That is the tensioner, the pulley is attached to the other end with a 14mm bolt. You can get the tensioner and pully from Sewell Lexus for $132.00. I know I just bought one from them a few weeks ago. Easy to change. Remove the belt, upper and middle covers on front of the engine. 3 10mm bolts holds the tensioner to the front of the engine. Remove it and slap on the new one. I recently did it on my 01 gs300.
I stand corrected. Thank you BigEZ. Sorry for doubting you. By any chance do you have the part numbers?
Old 02-23-12, 09:40 PM
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sam12345
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Look on sewellpartsonline.com then you can see the exploded view with all the part numbers. Register with your club Lexus name and you get a discount put your vin number when you register and they will make sure you get the correct part for your car.
Old 02-24-12, 06:54 AM
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Originally Posted by sam12345
Look on sewellpartsonline.com then you can see the exploded view with all the part numbers. Register with your club Lexus name and you get a discount put your vin number when you register and they will make sure you get the correct part for your car.
...what he said...see PNC (part number code) 16620 below...


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