Belt pulley causing cold start screech?
Thread Starter
Driver School Candidate
Joined: Feb 2020
Posts: 20
Likes: 0
From: VIC
Belt pulley causing cold start screech?
Hi,
On a cold start I get an abrupt screech sound, but as the car warms up during the day it isn’t presence anymore on startups. Have come to the conclusion it is the belt pulley? Causing the sound. Had my timing belt service 6 months ago which we did serpentine belt etc.
question is, can I just replace the bearing in said pulley? The one’s I bought and haven’t had installed are NSK 6203DDUCM. Size 17x40x12mm. Will these fit? and I am assuming this will save me forking out big money for the whole assembly? Which I might have to order from the US or Toyota locally.
just need to clarify, as my LS is due for service next month and I would like to have this annoying screech gone before winter hits.
On a cold start I get an abrupt screech sound, but as the car warms up during the day it isn’t presence anymore on startups. Have come to the conclusion it is the belt pulley? Causing the sound. Had my timing belt service 6 months ago which we did serpentine belt etc.
question is, can I just replace the bearing in said pulley? The one’s I bought and haven’t had installed are NSK 6203DDUCM. Size 17x40x12mm. Will these fit? and I am assuming this will save me forking out big money for the whole assembly? Which I might have to order from the US or Toyota locally.
just need to clarify, as my LS is due for service next month and I would like to have this annoying screech gone before winter hits.
CL Community Team
Joined: Dec 2005
Posts: 2,697
Likes: 824
From: 565 St Peter NOLA
Yes, if you have the tools the bearing can be pressed out and replaced. Many here, including myself, have done it.
Plenty of info here- https://www.clublexus.com/forums/ls-...numbers-4.html
Be mindful the thread was created for a 400 and the idler pulley part number has been superseded many times over the years. Check your tensioner pulley as well while you're in there.
Plenty of info here- https://www.clublexus.com/forums/ls-...numbers-4.html
Be mindful the thread was created for a 400 and the idler pulley part number has been superseded many times over the years. Check your tensioner pulley as well while you're in there.
Instructor
Joined: Dec 2015
Posts: 878
Likes: 232
From: Arizona
I'm guessing your issue is with the tensioner itself, not the pulleys. Belts screech when they don't have enough tension. Bearings make a chirp or a growl as they fail.
Last edited by 911LE; Mar 10, 2021 at 04:05 AM.
Pit Crew
Joined: Apr 2011
Posts: 137
Likes: 22
From: GA
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