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Old 05-27-2024, 04:03 PM #1
KarlitosWay KarlitosWay is offline
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Tapping or clicking sound upon startup, then idle stabilizes

1999 SR5, has a rough idle at startup, does this sound like rod-knock or something mechanical that is going to fail?

https://youtu.be/qynpUXGQ0fI
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Old 05-27-2024, 04:07 PM #2
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Quote:
Originally Posted by KarlitosWay View Post
1999 SR5, has a rough idle at startup, does this sound like rod-knock or something mechanical that is going to fail?

https://youtu.be/qynpUXGQ0fI


Video unavailable
This video is private
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Old 05-27-2024, 05:07 PM #3
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Just changed the settings
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Old 05-27-2024, 05:47 PM #4
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Just changed the settings
Still saying unavailable, you need to update the link I think.
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Old 05-28-2024, 03:10 AM #5
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28MAY24 00:09 PDT video still unavailable.
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Old 05-28-2024, 01:10 PM #6
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Apologies, try this maybe:

https://youtu.be/qynpUXGQ0fI
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Old 05-28-2024, 03:24 PM #7
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Maybe try removing belts one at a time and then listening.
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Old 05-28-2024, 04:42 PM #8
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Can't be a bad bearing somewhere, could it? I might be totally off but wanted to at least throw it out there for a conversation starter.

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Old 05-28-2024, 05:13 PM #9
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This is just an observation but to me it looked like the cooling fan slowed down at the same time as the noise subsided, if you can verify that as a fact in person it could very well be the fan clutch making the noise.

Other than that before you got the video link to work and without hearing the noise yet I was thinking it maybe "piston slap", so it could be that.
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Old 05-31-2024, 03:42 PM #10
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Also, maybe check the timing belt or chain. It could also be the lifters, which make noise until oil pressure builds up.
Sometimes, a worn or misaligned serpentine belt or its pulleys can cause noise at startup. Plus, check your oil level and condition.
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Old 05-31-2024, 04:51 PM #11
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Originally Posted by weberlukas74 View Post
Also, maybe check the timing belt or chain. It could also be the lifters, which make noise until oil pressure builds up.
Sometimes, a worn or misaligned serpentine belt or its pulleys can cause noise at startup. Plus, check your oil level and condition.
5vz is timing belt. No hydraulic lifters.

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Old 06-01-2024, 07:32 AM #12
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This is just an observation but to me it looked like the cooling fan slowed down at the same time as the noise subsided, if you can verify that as a fact in person it could very well be the fan clutch making the noise.

Other than that before you got the video link to work and without hearing the noise yet I was thinking it maybe "piston slap", so it could be that.
@ OP if it's your fan clutch that is a quick and easy fix! Aisin fan clutch from RockAuto, 4 nuts, remove clutch, install new one, 4 nuts, boom, done.

Is your engine roaring/noticeably louder than normal?
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Old 06-01-2024, 12:10 PM #13
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you can try the steps as listed above, remove a belt at a time, I agree it could be a fan clutch

get youself a piece of hose and hold it on various parts of your engine to listen to...or go to harbor freight or an auto parts store and get a stethoscope
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Old 06-03-2024, 04:59 PM #14
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Unless the computer speakers are fooling me... bad bearings "thunk" more than they "tap" or "click," I'm not hearing any of that
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