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post #1 of 17 (permalink) Old 07-31-2018, 08:13 PM Thread Starter
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07 Timing belt replacement problems...

Hello all,

My Elantra was at around 120k miles and due for its timing belt replacement (I elected to replace the belts and water pump etc/using a kit) When I picked it up the car from the mechanic it was making a squeaking sound that was very noticeable especially when accelerating from 0-20, but is audible at all speeds. I immediately notified the mechanic and he said there was likely some air in one of the lines and that it should clear in the next few weeks but if not to bring it back.

Fast forward one week and the squeak hasn't gone away, but today was a hot day and I decided to use the AC and was surprised that I only got hot air out of the car even after the AC ran for 10-15 minutes. I opened the hood and didn't see any movement in the serpentine belt when the AC was on (however I'm not knowledgeable enough to know if this runs intermittently)

Anyway, to me this seems like a straightforward error by the mechanic, but I guess I want to make sure if my logic is reasonable or if the mechanic might come back saying something else is wrong. Up until the timing belt replacement I have had no problems with the AC but I have never had it recharged.
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post #2 of 17 (permalink) Old 08-01-2018, 12:23 AM
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All the belts should be moving.
An electrical clutch is what engages and dis-engages the AC compressor.
The belt may not have been tightened or something came loose??
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post #3 of 17 (permalink) Old 08-01-2018, 12:37 AM
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Quote:
Originally Posted by jonparrish View Post
Hello all,

My Elantra was at around 120k miles and due for its timing belt replacement (I elected to replace the belts and water pump etc/using a kit) When I picked it up the car from the mechanic it was making a squeaking sound that was very noticeable especially when accelerating from 0-20, but is audible at all speeds. I immediately notified the mechanic and he said there was likely some air in one of the lines and that it should clear in the next few weeks but if not to bring it back.


Air in what? Ask him


Fast forward one week and the squeak hasn't gone away, but today was a hot day and I decided to use the AC and was surprised that I only got hot air out of the car even after the AC ran for 10-15 minutes. I opened the hood and didn't see any movement in the serpentine belt when the AC was on (however I'm not knowledgeable enough to know if this runs intermittently)



The belt wasn't moving. The engines running and the belt doesn't turn?


Anyway, to me this seems like a straightforward error by the mechanic, but I guess I want to make sure if my logic is reasonable or if the mechanic might come back saying something else is wrong. Up until the timing belt replacement I have had no problems with the AC but I have never had it recharged.
Answer my questions and we will go from there.

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post #4 of 17 (permalink) Old 08-01-2018, 10:33 AM Thread Starter
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Hello Grcauto...

He said that he thought that air must have got in the water pump line during the replacement and that it would naturally work it's way out but if it didn't they could blow it out later on. However he told me this listening to the sound in the car, we didn't open up the hood at the time. At the moment this seemed like a legitimate explanation. (this mechanic got great reviews from our neighbors)

Second, after watching a couple youtube videos to get familiar with the engine components, it looks like when I start up the car I can see two belts, one which is the timing and the other very close by but slightly further back which I believe is the serpentine. When the car is in idling the serpentine belt is definitely not turning when I toggle the AC on or off. I watched for about 10 minutes.
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post #5 of 17 (permalink) Old 08-01-2018, 11:17 AM
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Originally Posted by jonparrish View Post
Hello Grcauto...

He said that he thought that air must have got in the water pump line during the replacement and that it would naturally work it's way out but if it didn't they could blow it out later on.



You need a different mechanic....that is ludicrous. You can't blow air out of a cooling system. Not possible and never been done. Air in a cooling system will not make a squealing noise. I've been in the business for 45 years and it's never happened.



However he told me this listening to the sound in the car, we didn't open up the hood at the time. At the moment this seemed like a legitimate explanation. (this mechanic got great reviews from our neighbors)


Your neighbors need a new mechanic as well.


Second, after watching a couple youtube videos to get familiar with the engine components, it looks like when I start up the car I can see two belts, one which is the timing and the other very close by but slightly further back which I believe is the serpentine. When the car is in idling the serpentine belt is definitely not turning when I toggle the AC on or off. I watched for about 10 minutes.
The timing belt he replaced is behind the covers and can't be seen. The belt in the front is the serpentine belt and the one behind it is for your AC. He never tightened it back up correctly which is why you are hearing the squeal. This is also why your AC is not working.
Your mechanic should be pushing a broom in a garage and not working on cars.

You should update your profile with the vehicle you drive and where you live.
What state are you in? Here in Michigan if you run a legal business you have to be certified to work on them.
You should quote to respond. That way I get an email that you responded and I can reply. I just happened to come back here.
I would not use that so called mechanic again.

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post #6 of 17 (permalink) Old 08-01-2018, 01:49 PM Thread Starter
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Thanks for the feedback...I updated the information for my profile (Denver Colorado/07Elantra). So if I understand you correctly likely the belt I see running is the serpentine belt and the one further behind is the AC belt which looks like it is stuck. Listening again the sound is coming from that specific area. Thanks for the comments.

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Originally Posted by grcauto View Post
The timing belt he replaced is behind the covers and can't be seen. The belt in the front is the serpentine belt and the one behind it is for your AC. He never tightened it back up correctly which is why you are hearing the squeal. This is also why your AC is not working.
Your mechanic should be pushing a broom in a garage and not working on cars.

You should update your profile with the vehicle you drive and where you live.
What state are you in? Here in Michigan if you run a legal business you have to be certified to work on them.
You should quote to respond. That way I get an email that you responded and I can reply. I just happened to come back here.
I would not use that so called mechanic again.
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post #7 of 17 (permalink) Old 08-01-2018, 02:10 PM
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Originally Posted by jonparrish View Post
Thanks for the feedback...I updated the information for my profile (Denver Colorado/07Elantra). So if I understand you correctly likely the belt I see running is the serpentine belt and the one further behind is the AC belt which looks like it is stuck. Listening again the sound is coming from that specific area. Thanks for the comments.
I tend to be a bit harsh on shops that display ignorance. My comments about the air in the system and it not creating a squeal are justified.
That being said, maybe he was having a bad day and didn't really hear the squeal. I don't have the best of hearing myself.
Let's move on. If the belt is squealing it's because it's slipping around a tight rotating devise like an idler or compressor and most likely WILL NOT be just sitting there. Also, if the squeal is the belt it'll start smoking and break before long. Just minutes. Are you sure the belt is not moving?

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post #8 of 17 (permalink) Old 08-02-2018, 12:42 PM Thread Starter
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Thanks for the comments....It made me better armed when I went back into the shop. I think I have a final resolution with this. I ended up taking the car back and they spent at least 4 hours looking at it. The head mechanic told me two things. The timing belt was slightly too tight making the sound and they reset the tension on the belt and that eliminated the noise. They also said that the A/C belt had been put on too loose and they had to tighten it. I picked up the car this morning and the sound was gone plus the AC is working just like normal.

The head mechanic apologized for the inconvenience and said that they had fired the mechanic who had worked on my car due to poor workmanship issues. I didn't want anyone to lose their job over this, but obviously, those were two big mistakes that he made. I'm assuming the first mechanic didn't do proper quality control before giving me the car back the first time.


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I tend to be a bit harsh on shops that display ignorance. My comments about the air in the system and it not creating a squeal are justified.
That being said, maybe he was having a bad day and didn't really hear the squeal. I don't have the best of hearing myself.
Let's move on. If the belt is squealing it's because it's slipping around a tight rotating devise like an idler or compressor and most likely WILL NOT be just sitting there. Also, if the squeal is the belt it'll start smoking and break before long. Just minutes. Are you sure the belt is not moving?
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post #9 of 17 (permalink) Old 08-02-2018, 12:49 PM
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Originally Posted by jonparrish View Post
Thanks for the comments....It made me better armed when I went back into the shop. I think I have a final resolution with this. I ended up taking the car back and they spent at least 4 hours looking at it. The head mechanic told me two things. The timing belt was slightly too tight making the sound and they reset the tension on the belt and that eliminated the noise. They also said that the A/C belt had been put on too loose and they had to tighten it. I picked up the car this morning and the sound was gone plus the AC is working just like normal.

The head mechanic apologized for the inconvenience and said that they had fired the mechanic who had worked on my car due to poor workmanship issues. I didn't want anyone to lose their job over this, but obviously, those were two big mistakes that he made. I'm assuming the first mechanic didn't do proper quality control before giving me the car back the first time.
It sounds like my criticism of the mechanic was well founded. Glad they got it fixed correctly. Did they charge you anything more?
I do not understand one thing....the timing belt does not get adjusted. The tensioner is spring loaded and has no adjustment.

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Last edited by grcauto; 08-02-2018 at 12:54 PM.
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post #10 of 17 (permalink) Old 08-02-2018, 12:52 PM
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... The timing belt was slightly too tight making the sound and they reset the tension on the belt and that eliminated the noise. They also said that the A/C belt had been put on too loose and they had to tighten it...

I would certainly have insisted that they replace both belts with new ones. Having the timing belt too tight didn't do any favors to it. Was it tight enough to stretch it? Did this shorten its life?
Having the AC belt too loose is bound to have caused the drive pulley to have worn away part of the belt. I would be pretty sure that its life was reduced.
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