Aux belt tensioner failure

kprida · Feb 23rd, 2018, 22:22

I originally posted in the wrong section, but anyway.

I had my aux belt tensioner replaced under recall. ~6 weeks and < 1000 miles later the bolt holding the modified part on has sheared off. Luckily the belt didn't wrap around the crank. The garage are waiting on Volvo for technical advice. Now I'd assume drill the remains and use a bolt extractor, new bolt in and off we go (unless there is damaged not mentioned). The garage did mention things like might have to go to a specialist and striping down to get to the block! The issue of who pays is also up in the air...

Anyone else had this happen?

Clan · Feb 24th, 2018, 17:15

Quote:

Originally Posted by kprida

I originally posted in the wrong section, but anyway.

I had my aux belt tensioner replaced under recall. ~6 weeks and < 1000 miles later the bolt holding the modified part on has sheared off. Luckily the belt didn't wrap around the crank. The garage are waiting on Volvo for technical advice. Now I'd assume drill the remains and use a bolt extractor, new bolt in and off we go (unless there is damaged not mentioned). The garage did mention things like might have to go to a specialist and striping down to get to the block! The issue of who pays is also up in the air...

Anyone else had this happen?

It is pretty obvious that the bolt was grossly overtightened to just under the breaking point . get a look at the invoice too to see if they used a new bolt which is vital hopefully the threads in the cylinder block are still ok ...

volvo for ever · Feb 24th, 2018, 17:19

guarantee its been over tightened see this twice before and managed both times to remove t

think torxt40 is 24nm

regards

kprida · Feb 24th, 2018, 17:32

Promising to hear you've fixed twice before. The way the service guy was talking it sounded bad. To me drill and extract is what required. I'm wondering if they have done that and found threads messed up. I'd assume in that case drill and helicoil. Apparently waiting on Volvo to advise.

Unfortunately I can't find an invoice. It was done as a recall job as it had gone past 50k miles, replace hydraulic tensioner with mechanical. Ironically the job was done to try and stop exactly this happening.

volvo for ever · Feb 24th, 2018, 20:03

dont know why there contacting volvo

remove engine mounting let engine drop on driver side and drill hole in center then extract it no drama

the ones i did before were defo not torqued up

regards

kprida · Feb 24th, 2018, 20:45

Exactly what I thought. Makes me suspect they never drilled a bolt out before, or they either messed up getting the bolt out or they got the bolt out and found more damage and are now not sure what to do, especially as they should be footing the bill. Just hope they hurry up, I need a car to get to work!

GrahamBrown1 · Feb 24th, 2018, 21:01

If they helicoil it or try any other like repair then I’d be trading it in. I wouldn’t be relying on a helicoil. There only as good as the person who put it in and so far they can’t even torq a bolt up. Make sure you find out how they repaired it.

Clan · Feb 24th, 2018, 21:06

Quote:

Originally Posted by GrahamBrown1

If they helicoil it or try any other like repair then I’d be trading it in. I wouldn’t be relying on a helicoil. There only as good as the person who put it in and so far they can’t even torq a bolt up. Make sure you find out how they repaired it.

A helicoil is stronger than the original thread , but they need to full kit of guides and tang breaker tool to do the job .

kprida · Feb 24th, 2018, 21:12

Have to admit I'm not sure I will trust any repair and am considering chopping it straight in. Seriously thinking about going back to bangernomics and do my own maintenance as I've pretty much given up on letting someone else do the job.

kprida · Mar 3rd, 2018, 12:42

In theory I should get my car back Monday. Bolt was removed and new tensioner fitted. Apparently the tensioner needed repositioning as the was slight play when torqued up. Not sure how that works as I thought it was a peg and bolt, unless the peg didn't sit right?

An engineer was sent to look at it, apparently he's done one once before that did the same thing.

They have done some miles in it to make sure it's ok. Just waiting for mechanic to check it again, all being well back on the road Monday.

Feb 23rd, 2018, 22:22	#1
kprida Junior Member Last Online: Mar 4th, 2023 09:00 Join Date: May 2012 Location: suffolk	Aux belt tensioner failure I originally posted in the wrong section, but anyway. I had my aux belt tensioner replaced under recall. ~6 weeks and < 1000 miles later the bolt holding the modified part on has sheared off. Luckily the belt didn't wrap around the crank. The garage are waiting on Volvo for technical advice. Now I'd assume drill the remains and use a bolt extractor, new bolt in and off we go (unless there is damaged not mentioned). The garage did mention things like might have to go to a specialist and striping down to get to the block! The issue of who pays is also up in the air... Anyone else had this happen?

Feb 24th, 2018, 21:01	#7
GrahamBrown1 VOC Member Last Online: Yesterday 19:49 Join Date: Feb 2013 Location: North Yorkshire	If they helicoil it or try any other like repair then I’d be trading it in. I wouldn’t be relying on a helicoil. There only as good as the person who put it in and so far they can’t even torq a bolt up. Make sure you find out how they repaired it. __________________ Previous -03 S40, 04 V70 D5, 04 V70 D5 Sport, 05 V50, 07 S60 D5, 09 V70 D5 R design, 12 XC60 DrivE, 15 V60 D3 Current- 05 XC90 D5 Exec, 12 XC70 D4 AWD Se Lux, 14 S80 D3 Se Lux

Feb 24th, 2018, 17:19	#3
volvo for ever Premier Member Last Online: Feb 4th, 2023 15:10 Join Date: Apr 2015 Location: uk	guarantee its been over tightened see this twice before and managed both times to remove t think torxt40 is 24nm regards

Feb 24th, 2018, 17:32	#4
kprida Junior Member Last Online: Mar 4th, 2023 09:00 Join Date: May 2012 Location: suffolk	Promising to hear you've fixed twice before. The way the service guy was talking it sounded bad. To me drill and extract is what required. I'm wondering if they have done that and found threads messed up. I'd assume in that case drill and helicoil. Apparently waiting on Volvo to advise. Unfortunately I can't find an invoice. It was done as a recall job as it had gone past 50k miles, replace hydraulic tensioner with mechanical. Ironically the job was done to try and stop exactly this happening.

Feb 24th, 2018, 20:03	#5
volvo for ever Premier Member Last Online: Feb 4th, 2023 15:10 Join Date: Apr 2015 Location: uk	dont know why there contacting volvo remove engine mounting let engine drop on driver side and drill hole in center then extract it no drama the ones i did before were defo not torqued up regards

Feb 24th, 2018, 20:45	#6
kprida Junior Member Last Online: Mar 4th, 2023 09:00 Join Date: May 2012 Location: suffolk	Exactly what I thought. Makes me suspect they never drilled a bolt out before, or they either messed up getting the bolt out or they got the bolt out and found more damage and are now not sure what to do, especially as they should be footing the bill. Just hope they hurry up, I need a car to get to work!

Feb 24th, 2018, 21:12	#9
kprida Junior Member Last Online: Mar 4th, 2023 09:00 Join Date: May 2012 Location: suffolk	Have to admit I'm not sure I will trust any repair and am considering chopping it straight in. Seriously thinking about going back to bangernomics and do my own maintenance as I've pretty much given up on letting someone else do the job.

Mar 3rd, 2018, 12:42	#10
kprida Junior Member Last Online: Mar 4th, 2023 09:00 Join Date: May 2012 Location: suffolk	In theory I should get my car back Monday. Bolt was removed and new tensioner fitted. Apparently the tensioner needed repositioning as the was slight play when torqued up. Not sure how that works as I thought it was a peg and bolt, unless the peg didn't sit right? An engineer was sent to look at it, apparently he's done one once before that did the same thing. They have done some miles in it to make sure it's ok. Just waiting for mechanic to check it again, all being well back on the road Monday.

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