Aux belt chirp/jumping

doolie · Oct 22nd, 2017, 14:13

Hi guys

I recently had the auxiliary belt start to chirp and have a little bit of belt jumping. Had the auxiliary belt, tensioners and alternator pulley changed about 3k ago due to same issue was all quiet but now issue seems to be coming back. What else on the drive belt system usually causes issues ?

Thanks

gmonag · Oct 22nd, 2017, 14:52

Did you use aftermarket parts?

doolie · Oct 22nd, 2017, 15:15

Quote:

Originally Posted by gmonag

Did you use aftermarket parts?

All genuine volvo parts except alternator pulley which was INA 30667878 which I believe is oem.

gmonag · Oct 23rd, 2017, 09:38

If it's chirping there is something wrong. Take it off and check.

Tannaton · Oct 23rd, 2017, 10:02

Quote:

Originally Posted by gmonag

If it's chirping there is something wrong. Take it off and check.

Agree totally with the above, if the aux belt lets go for any reason that usually takes out the timing belt as well. This scenario is the most common reason for Xc90s being scrapped.

Mike A · Oct 23rd, 2017, 10:18

I had same problem changed everything .. still there ... Replaced new belt with another ..chirp went away ...just shows you if new parts can still be faulty..all parts were volvo

doolie · Oct 23rd, 2017, 10:27

Quote:

Originally Posted by Tannaton

Agree totally with the above, if the aux belt lets go for any reason that usually takes out the timing belt as well. This scenario is the most common reason for Xc90s being scrapped.

Thanks that's my concern and why Im trying to sort it out urgently. Had a quick look this morning and the tensioner seems to be vibrating have it booked in for Thursday.

Bonefishblues · Oct 23rd, 2017, 11:01

We recovered our XC70 to the garage on the Indy's advice when this happened to us - as he said, it probably will be OK, but there again it might not, so I didn't take the chance. Just a thought.

cheshired5 · Oct 23rd, 2017, 13:05

Quote:

Originally Posted by doolie

All genuine volvo parts except alternator pulley which was INA 30667878 which I believe is oem.

30667878 is the Volvo part number.
What was the INA part number used?

Has the AC pulley and bearing been checked?

oragex · Oct 25th, 2017, 00:02

When the tensioner is shaking it means a pulley isn't smooth any long - could be any pulley on the belt. Plus, chirping means a pulley is about to seize and snap the belt. If yours is a diesel, the belt it will curl around the crank pulley and ruin the engine, so kind of urgent. Just remove the belt and test every single pulley on the belt by hand - including as mentioned above the air conditioning compressor pulley, this one commonly goes bad after 100k miles.

That said, if the noise is exactly the same as before repair, I'd have a bit of suspicion on the garage itself.

Oct 22nd, 2017, 14:13	#1
doolie Junior Member Last Online: Jul 4th, 2020 01:44 Join Date: Mar 2016 Location: derry	Aux belt chirp/jumping Hi guys I recently had the auxiliary belt start to chirp and have a little bit of belt jumping. Had the auxiliary belt, tensioners and alternator pulley changed about 3k ago due to same issue was all quiet but now issue seems to be coming back. What else on the drive belt system usually causes issues ? Thanks

Oct 22nd, 2017, 14:52	#2
gmonag Premier Member Last Online: Jan 15th, 2024 17:24 Join Date: Jun 2010 Location: Bury St Edmunds	Did you use aftermarket parts? __________________ Greg

Oct 23rd, 2017, 09:38	#4
gmonag Premier Member Last Online: Jan 15th, 2024 17:24 Join Date: Jun 2010 Location: Bury St Edmunds	If it's chirping there is something wrong. Take it off and check. __________________ Greg

Oct 25th, 2017, 00:02	#10
oragex Premier Member Last Online: Jul 26th, 2021 21:24 Join Date: Jun 2013 Location: Coldnada	When the tensioner is shaking it means a pulley isn't smooth any long - could be any pulley on the belt. Plus, chirping means a pulley is about to seize and snap the belt. If yours is a diesel, the belt it will curl around the crank pulley and ruin the engine, so kind of urgent. Just remove the belt and test every single pulley on the belt by hand - including as mentioned above the air conditioning compressor pulley, this one commonly goes bad after 100k miles. That said, if the noise is exactly the same as before repair, I'd have a bit of suspicion on the garage itself. __________________ Several Volvo Repair Videos https://www.youtube.com/playlist?lis...ECTts0FSVSOT_c Last edited by oragex; Oct 25th, 2017 at 00:07.

Oct 23rd, 2017, 10:18	#6
Mike A Member Last Online: Apr 24th, 2024 18:58 Join Date: Apr 2006 Location: Wakefield	I had same problem changed everything .. still there ... Replaced new belt with another ..chirp went away ...just shows you if new parts can still be faulty..all parts were volvo

Oct 23rd, 2017, 11:01	#8
Bonefishblues Premier Member Last Online: Today 11:35 Join Date: Oct 2014 Location: Near Bicester, Oxon	We recovered our XC70 to the garage on the Indy's advice when this happened to us - as he said, it probably will be OK, but there again it might not, so I didn't take the chance. Just a thought.

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