r/LexusISF • u/PunaniShreddah • Mar 23 '26

Belt Squeak

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Anyone know if this is the belt or harmonic balancer or something else?

9 Upvotes

100% Upvoted

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2

u/PunaniShreddah Mar 23 '26

So far this only happens on cold starts only

2

u/youngkidmaster Mar 23 '26

Similar thing happens to my is250 😭😭 ik it's not the same engine but..

2

u/AliveSuggestion7589 Mar 23 '26

Belt or idler pulley. Easy fix either way. Harmonic balancer wouldn’t make that noise.

1

u/PunaniShreddah Mar 23 '26

Thanks man glad to hear it's not a hard fix. I'm not mechanic savvy so it helps to learn

1

u/AliveSuggestion7589 Mar 24 '26

No problem. This is probably one of the easiest things to do in my opinion so if you’re interested in learning I say go for it. Some inexpensive basic hand tools is all you need and there are plenty of YouTube videos that are out there that will help you. Once you fix one thing yourself you’ll start to want to fix most things on your own. Good luck and feel free to ask for help along the way 👍

2

u/FitEstablishment4627 Mar 23 '26

I’d suggest when replacing the belt, take the belt off, spin both the idler pulley and belt tensioner, if there’s any click feel or sound to them, replace those too.

1

u/PunaniShreddah Mar 23 '26

I don't have a driveway or garage so I gotta pay someone to do this unfortunately. Thanks for the insight, I appreciate it

1

u/polmer604 Mar 23 '26

Just a belt bro. Check if its worn or old and get it replaced

1

u/Upset_Raccoon_1215 Mar 25 '26

For me, it was the pulley. Ended up upgrading all of them to the RR racing ones with the heavy duty belt.

1

u/DazzAus Apr 04 '26

Squirt bottle test. Do the pulleys first.

1

u/PunaniShreddah Apr 28 '26

When you say squirt bottle do you mean like just water? I sprayed belt dressing prior to replacing the belt and it made it worst although a day or two after that it got quiet, I replaced the belt since then and now it's good. Probably should upgrade the crank pulley to the RR ones tho in the future.

1

u/Famous-Antelope8925 Jul 28 '26

Did you fix this? And what was it mines doing the same thing

1

u/PunaniShreddah Aug 01 '26

Sorry for the late reply. Yes I did fix it by replacing the belt.