2008 Yaris knocking/rattling sound near drive belt - Toyota Yaris Forums

avs262 · 07-20-2015, 07:01 PM

I have a 1.3L Yaris manual transmission that is knocking/rattling near the drive belt. I've searched around on here and found that this could be caused by the water pump so I replaced the water pump and drive belt last night. The water pump did have antifreeze all around it so I thought for sure that was the problem. After replacing I fired up the engine and the problem continues. I've taken a video (https://vid.me/VLYv) so you can hear the noise - has anyone experienced this? My next step is to go buy a stethoscope. Any other ideas would be greatly appreciated!

avs262 · 07-20-2015, 11:43 PM

It turned out to be the a/c unit. I listened with a stethescope and loud knocking could be heard from the a/c. I used a serpentine belt from a non a/c configuration to bypass it until I figure out what's wrong with it.

valchrist90731 · 07-21-2015, 03:30 AM

But does the a.c. work when on? Does it blow cold air?

How's the pulley? That's a different noise never heard that yet.

Mikastef · 07-21-2015, 05:15 AM

Do u use the air con often..? If not, then it should not be the AC unit

avs262 · 07-21-2015, 06:34 PM

Quote:

Originally Posted by valchrist90731

But does the a.c. work when on? Does it blow cold air?

How's the pulley? That's a different noise never heard that yet.

The a/c does work when it's turned on (I don't use it often) and is blowing cool air. I will check the pulley and report back.

07-20-2015, 07:01 PM	#1
avs262 Drives: Yaris 08 sedan Join Date: Feb 2015 Location: Castle rock colorado Posts: 3	2008 Yaris knocking/rattling sound near drive belt I have a 1.3L Yaris manual transmission that is knocking/rattling near the drive belt. I've searched around on here and found that this could be caused by the water pump so I replaced the water pump and drive belt last night. The water pump did have antifreeze all around it so I thought for sure that was the problem. After replacing I fired up the engine and the problem continues. I've taken a video (https://vid.me/VLYv) so you can hear the noise - has anyone experienced this? My next step is to go buy a stethoscope. Any other ideas would be greatly appreciated!

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07-20-2015, 11:43 PM	#2
avs262 Drives: Yaris 08 sedan Join Date: Feb 2015 Location: Castle rock colorado Posts: 3	It turned out to be the a/c unit. I listened with a stethescope and loud knocking could be heard from the a/c. I used a serpentine belt from a non a/c configuration to bypass it until I figure out what's wrong with it.

07-21-2015, 03:30 AM	#3
valchrist90731 Drives: 2007 toyota yaris sedan Join Date: Jun 2015 Location: Los Angeles County Posts: 61	But does the a.c. work when on? Does it blow cold air? How's the pulley? That's a different noise never heard that yet.

07-21-2015, 05:15 AM	#4
Mikastef Drives: Yaris Join Date: Feb 2013 Location: Mauritius Posts: 53	Do u use the air con often..? If not, then it should not be the AC unit