02 Civic-Belt squeak noise (only when AC is on) - Honda Civic Forum



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Old 4 Days Ago   #1
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02 Civic-Belt squeak noise (only when AC is on)

Hello,

I posted an issue with my 02 Honda Civic grinding noise a while ago (
https://www.civicforums.com/forums/3...ml#post4723566 ). At that time, turn on/off AC has no effect on the noise.

Last week, I took the car to mechanic and they replace the alternator, alternator belt. They said compressor belt is not good either, so I replace it too. And since then, I heard a different noise, much louder, but only happened when I turn on AC, particularly when I cold start the car in the morning, or parking car on driveway for a few hours then drive the car into garage later. I replaced the whole AC system 3 years ago. When I turn on AC, every 15-20 seconds I hear a "metal click" then fan is running for 5-10 seconds then off, then the whole cycle restart again. The belt noise happened right after the "metal click".

audio recording:

video recording:

My immediate suspect is compressor belt since noise is related to A/C only, but could alternator belt has issue ( such as loosing belt) and cause the noise?

I am going to take the car back to the shop but want to educate myself first for the possible cause. Last week when I change the alternator and belts, I want to do a test drive first, but the owner don't allow me, insist me paying first... I'd like to prepare myself

Thank you!

Last edited by hiac; 4 Days Ago at 09:47 PM.
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Old 4 Days Ago   #2
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Re: 02 Civic-Belt squeak noise (only when AC is on)

The alternator and the AC compressor share the same belt.

That belt is not adjusted correctly, it is too loose.
Inspect condition and if okay, adjust it tighter (or have your installer adjust it tighter).

It must be adjusted tight enough to not scream under any condition.

If it's been doing this for a significant amount of time, the belt can suffer excessive wear and damage.
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Re: 02 Civic-Belt squeak noise (only when AC is on)

Sounds like the a/c tensioner pulley is shot, or belt is too loose. Either way ..the shop probably didn't tension it correctly.
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Re: 02 Civic-Belt squeak noise (only when AC is on)

SOME aftermarket belts may stretch significantly after they have been 'run in', so readjustment is often necessary shortly after installation.
One more reason I prefer OE parts, LOL


(The D17Ax engines do not use a tensioner pulley for the two accessory belts.)
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Re: 02 Civic-Belt squeak noise (only when AC is on)

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Originally Posted by ezone View Post
(The D17Ax engines do not use a tensioner pulley for the two accessory belts.)
Thanks Ezone. I will know these things when I change my mom's D17 timing belt sometime in the future. Makes it easy to narrow down that noise w/o a tensioner.
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Re: 02 Civic-Belt squeak noise (only when AC is on)

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Originally Posted by ezone View Post
If it's been doing this for a significant amount of time, the belt can suffer excessive wear and damage.
Hello ezone,

Thank you very much for your reply. I took the car to the shop, they said 02 honda civic has a manual tensioner (not the automatic one), so they re-tighten it. I drove home and didn't hear the noise. I just open the hood, and notice the power steering fluid reservoir is not clip in, so it hanging there. This shop is just doing lousy job.

I drove for about 200 miles since the belt replacement. I turned on AC for total maybe half an hour in past week, it's not hot most of day... When it's local driving and I heard the noise, I turn AC off right away. On highway it's hard to say because it's noisy anyway.

i wonder if belt could suffer excessive wear and damage? I didn't notice any cracks, but my eyes are not trained either... I took some photo, http://imgur.com/a/wNOR3, to best of your knowledge, you feel the belt looks Ok?

Many thanks!
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Re: 02 Civic-Belt squeak noise (only when AC is on)

Hi Megalodong,

Thank you for your input. I took the shop, they said they tighten tensioner. noise is gone. Hopefully it will hold
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Re: 02 Civic-Belt squeak noise (only when AC is on)

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they said 02 honda civic has a manual tensioner
The two belts are manually adjusted.
However,
Adjustment of the alternator/compressor belt is accomplished by repositioning the alternator.
It's lower bracket is slotted (see near letter C) so it can be moved as needed to attain the desired belt tension. There is a "jack bolt" (E) that may be used to assist with moving the alternator.




The PS reservoir was moved in order to reach the fasteners for the alternator.

I sure hope they got the alternator bolts tight again.
Guess what can happen if they forgot
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Re: 02 Civic-Belt squeak noise (only when AC is on)

Hi ezone,

As always, Thank you very much for your input.

a/b/c/d/e, which one is alternator bolts, I will see if my finger can reach it to test if it's tight.

Many thanks!
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Re: 02 Civic-Belt squeak noise (only when AC is on)

B and C secure the alternator

D secures the slotted bracket to the engine block
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Re: 02 Civic-Belt squeak noise (only when AC is on)

Quote:
Originally Posted by ezone View Post
B and C secure the alternator

D secures the slotted bracket to the engine block
Hi ezone,

Many thanks! I use finger to feel the alternator and feel it's not moving.

I have a engine light on today, "P0133 HONDA O2 Sensor Circuit Slow Response Bank 1 Sensor 1". When car started has issue, all kind of issue start to pop up

Many thanks for your help!
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Re: 02 Civic-Belt squeak noise (only when AC is on)

Quote:
"P0133
O2 Sensor Circuit Slow Response Bank 1 Sensor 1".
That is probably just a failing sensor.

Erase the code, see how long before it returns?

Quote:

Many thanks! I use finger to feel the alternator and feel it's not moving.
Wrenches should have been used to check the hardware is torqued properly.
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