Auxillary Drive Belt tensioner bolt has snapped - Alfa Romeo Forum
You are currently unregistered, register for more features.    
 
Thread Tools
(Post Link) post #1 of 23 Old 19-10-02 Thread Starter
Status: -
 
Join Date: Jan 2001
Posts: 715
Auxillary Drive Belt tensioner bolt has snapped

Well 10a is in a coma at the moment. Not sure when it will wake up

The bolt that holds on the auxillary drive belt tensioner has snapped. I see why 155's have an undertray under the engine.... to catch the bits which fall off!! This is where I found the tensioner. The bolt has sheered off in the bottom of the engine casing. Luckily I can sort of get to it to try and drill it out.

Tried some reverse thread extractors, but snapped one of these in the stub of the alloy bolt, so now it is nearly impossible to drill.

Local garage didn't want to touch it either. God knows what I am going to do

Someone is coming to have a look at it on Monday night, so fingers crossed.
Henry Yorke is offline  
Sponsored Links
Advertisement
 
wrinx
Status: - Update
Guest
 
Posts: n/a
Real bad news H Hopefully Monday brings good news wink

wrinx
 
jimybob
Status: - Update
Guest
 
Posts: n/a
its not so bad all you do is build up the broken end with weld then weld on a nut and while its still hot turn out the busted bit.
 
Status: -
AO Silver Member
 
Join Date: Feb 2002
Location: liverpool
Posts: 1,183

Member car:

155 Q4

Sorry to here that H my tensioner has been makin a noise for a wee while now i take it this is common anyone got ant ideas on what the parts cost and whats involved (any special tools needed) as i havent looked into this really been putting it off but its stories like this that make your butt twinge ,im scared to use car now .
thanks for any help guys Henry good look and are u taking any photos ? eek!
fletch is offline  
(Post Link) post #5 of 23 Old 20-10-02 Thread Starter
Status: -
 
Join Date: Jan 2001
Posts: 715
It is a chuffing 42p bolt!!! and M8x50 that holds the Auxillary drive belt tensioner on. It is relatively easy to get to under the off side front wheel arch if you remove the plastic guard. Welding alloy to alloy isn't easy though. I have perhaps made it worse by drilling it a lot and getting this piece of strengthened steel in it

It is not the cam belt tensionerthough, it is a different one at the bottom of the engine
Henry Yorke is offline  
bw
Status: - Update
Guest
 
Posts: n/a
Sorry to hear the bad news Henry.

Fletch, I just had the auxilliary drive belt tensioner replaced on my car because it was making a rattling noise (see Main dealer strife thread) - the part was 34 inc VAT I think on my 2.0 twinspark.
 
wrinx
Status: - Update
Guest
 
Posts: n/a
Henry

Isn't the bolt steel not alloy? Is there any of it sticking out, may be possible to do what JB is suggesting.

wrinx
 
jimybob
Status: - Update
Guest
 
Posts: n/a
alloy bolt? no way is it alloy..which bolt exactly is it you say aux drive is that balance belt or alternator or air-con.??

if the bolt is in an alloy block there is even less chance of you welding the whole thing together cos it wont stick to the alloy only the bolt.
 
shug
Status: - Update
Guest
 
Posts: n/a
The man,s correct, speaking from experience the heat from welding steel next to an aluminium alloy could damage the alloy so tread carefully
Regards Shug
 
Mark T
Status: - Update
Guest
 
Posts: n/a
Sorry to hear about your prob Henry.

Has the bolt snapped off in the engine block, or is it in a separate casing that can be removed (Sorry not familiar with the TS-16V engine)
If so, I've got a mate who has a spark & wire erosion business in Leeds who owes me a few favours. He'll be able to get it out, but it 'll means getting the offending part out of the car, so he can get it into his machine.

Let me know how you get on.

Mark
 
(Post Link) post #11 of 23 Old 21-10-02 Thread Starter
Status: -
 
Join Date: Jan 2001
Posts: 715
It is in the bottom of the engine casting. You can't put steel bolts in Alloy blocks as they corrode, so yes it is alloy.

Getting worried now frown
Henry Yorke is offline  
Nick Round
Status: - Update
Guest
 
Posts: n/a
Henry, I thought it was only the 8V engines that had alloy blocks, aren't the 16V steel with an alloy head?
Probably taking rubbish though
 
wrinx
Status: - Update
Guest
 
Posts: n/a
eerrrr, Henry, there are lots of steel parts in your alloy engine. Can't remember the last time I saw an alloy bolt! They would be about as useful as a plastic bolt eek!

But you are right, steel and alloy do "weld" together in time, Landrovers are bad for this apparantly!

Let me know if I can help at all

wrinx
 
fade2grey
Status: - Update
Guest
 
Posts: n/a
hey henry. I'm guessing if the stud extractors aint worked then drilling might be the only option. If you can't get decent equipment in there to drill it, I'm the engine may have to come out so you have the room to move.

fingers crossed mate.
 
mal
Status: - Update
Guest
 
Posts: n/a
Quote:
Henry Yorke:
It is in the bottom of the engine casting. You can't put steel bolts in Alloy blocks as they corrode, so yes it is alloy.

Getting worried now
blocks are steel not alloy on 16V
 
jimybob
Status: - Update
Guest
 
Posts: n/a
cast iron actually the head is ally.
 
(Post Link) post #17 of 23 Old 27-10-02 Thread Starter
Status: -
 
Join Date: Jan 2001
Posts: 715
All fixed now. The guys drilled a bigger hole and put an insert (made out of a drilled out bolt on a lathe) in. Cost about 140! Had to drop the engine a bit too. Never touching extractors again!
Henry Yorke is offline  
Status: -
AO Member
 
Join Date: Oct 2007
Location: United Kingdom
County: West Yorkshire
Posts: 11
Re: Auxillary Drive Belt tensioner bolt has snapped

Henry

I have had 2 bolts go in two weeks, did you ever find the cause as I am having a nightmare.
Mattrout is offline  
Status: zzzzzzzz
AO Platinum Member
 
symon's Avatar
 
Join Date: Dec 2005
Location: United Kingdom
County: Oxfordshire
Posts: 37,081
Re: Auxillary Drive Belt tensioner bolt has snapped

Quote:
Originally Posted by Mattrout View Post
Henry

I have had 2 bolts go in two weeks, did you ever find the cause as I am having a nightmare.
This is a pretty old thread you have revived..

I would guess overtightening the bolt could be a factor. If the bolt is overtightened it can stop the tensioner self tensioning. This will also prevent the spring taking any shocks from the belt, instead it will stress the bolt.
symon is offline  
Status: -
AO Member
 
Join Date: Oct 2007
Location: United Kingdom
County: West Yorkshire
Posts: 11
Re: Auxillary Drive Belt tensioner bolt has snapped

Thanks for that, have had much problems with the tensioner in the last year since it was fitted new, been through 9 belts. Think something is jamming somewhere in the system (new tensioner right through tested everything, lubricated to death) dont know if it is the alt. compress. or ps pump but as it does it only when belt death occurs and not at any other time its is hard to find
Would appreciate if anyone has seen this before as its getting to the point where Im going to sell up and move on
Mattrout is offline  
Status: zzzzzzzz
AO Platinum Member
 
symon's Avatar
 
Join Date: Dec 2005
Location: United Kingdom
County: Oxfordshire
Posts: 37,081
Re: Auxillary Drive Belt tensioner bolt has snapped

Quote:
Originally Posted by Mattrout View Post
Thanks for that, have had much problems with the tensioner in the last year since it was fitted new, been through 9 belts. Think something is jamming somewhere in the system (new tensioner right through tested everything, lubricated to death) dont know if it is the alt. compress. or ps pump but as it does it only when belt death occurs and not at any other time its is hard to find
Would appreciate if anyone has seen this before as its getting to the point where Im going to sell up and move on
Have you tried renewing the tensioners? Both the fixed one and the moving one?
symon is offline  
Status: -
AO Member
 
Join Date: Oct 2007
Location: United Kingdom
County: West Yorkshire
Posts: 11
Re: Auxillary Drive Belt tensioner bolt has snapped

Yes all three have been replaced in the last 12 months, originally fitted badly by my local garage and since correctly (incl tightening torque) by myself. Work fine for weeks or months then fails in a couple of seconds which makes me think that something is jamming. Not being overtightened as can easily turn the tensioner to fit belt. Originally belt failing every few weeks , now its the turn of the tensioner bolt. Thanks for the reply
Mattrout is offline  
Status: Still going strong.
AO Silver Member
 
armoore's Avatar
 
Join Date: Jan 2002
Location: United Kingdom
County: Surrey
Posts: 5,134
Re: Auxillary Drive Belt tensioner bolt has snapped

Sounds as though one of the pulleys, alternator, steering pump or air-con, is sticking at some point. The belt will then burn through due to friction in no time. Gf's ride-on mower does that if the blades get stuck and at £60 each! It is possible (I think) to get a belt that doesn't drive the air-con but does drive the others so that could be a a starting point and see if that fails. The air-con pump has a clutch device if memory serves, so perhaps that's playing up or more internal to the pump than that.

As shown here.

http://cgi.ebay.co.uk/Alfa-145-146-1...742.m153.l1262

Last edited by armoore; 09-11-08 at 13:29.
armoore is offline  
Reply

Go Back   Alfa Romeo Forum > Supported Alfa Romeo Models > Technical & Vehicle Assistance > Engines (TS, JTS, JTD & V6)

Tags
auxillary , belt , bolt , drive , snapped , tensioner

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome