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Technical 2.8 jtd cambelt tensioner setup

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Technical 2.8 jtd cambelt tensioner setup

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valtechauto

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Hi all!
Hope someone can help as nothing found on forums and Google seems to help...

2001 reg 2.8 jtd
no AC
engine no 3304976

Went to replace cambelt.
tensioner bearing shattered as it was released. All spacers went flying out in a pile. Tensioner block arm snapped.

so new cambelt kit, tensioner arm, spring tensioner.

and I'm not sure what order spacer parts go back in.

according to a diagram in webstudy and other online sources:
New bearing slid onto tensioner arm, with the long engine stud through it all.
Then shouldered washer. shoulder to bearing.
large washer.
Cover goes on and secured with spring washer and 17mm nut.

Like shown below

1689960422426.png




Now...

Original belt is 151 teeth.
After 2 attempts motor factors supplied the correct kit... apparently.

When the belt is on and tensioner is released at centre nut (21) and top bolt of the bracket (4), belt is very slack above the tensioner on turning the engine by hand clockwise.

Spring tensioner (3) in fully out. But I can easily pull the belt off by hand!

I'm guessing the tensioner is not assembled correctly, as it only gives a few mm adjustment.

Thanks in advance for your help.

Val
 
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Are you sure it is the correct belt etc. as they did different numbers of teeth due to a change in the size of guide and tensioner wheels on the Sofim 2.8 engines, over the years I have had five in Iveco Daily form.
If you give me the 8140.** series number I have the timing book details for them , although if you have got this far that side is probably not a problem.
Are you sure the tensioner spring sat in the water pump is going all the way, not sticking?
I suspect the wrong belt to match the diameters of the jockey/guides/tensioner bearings is the problem.
No chance it has had a 2,5 engine at some time as that would be similar but different belt etc.
There is a further stepped washer as I recall to locate the cam belt cover with out squashing it, but also I suspect to prevent people tightening or loosening the cover and affecting the tensioner side.
The Series number assuming correct engine should be on the bonnet slam panel area along with the weights etc..
 
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My first reaction was similar to that of @bugsymike. Possibly wrong timing belt. I have just double checked an old one from my 2006 2,8jtd, which I have kept as a sample. For an earlier query it is clearly marked with tipex every 10 teeth, then the odd 2 teeth, giving 152 teeth in total . I have seen 154 teeth mentioned (earlier query), but not 151 teeth.
If engine has been changed shouldn't it have been registered with the DVLA, and the V5C amended?
 
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I am aware of different size guide pulleys on the Iveco Sofim 2.8 engines, which would affect belt length requirements, possibly the OP can compare with old damaged parts?
In the past when I changed them I would buy as a complete kit belt, guides and tensioner bearing so all matched, but sounds harder to buy a complete kit by the sound of it.
Unusual that bearing shattered and tensioner block arm snapped, in all the ones I had I only had one that the bearing was even a little noisy on dismantling, so very unlucky, I trust engine was stationary when this happened otherwise serious engine damage very likely.:(
Re V5c in theory I agree, but no guarantee on 20 + year old commercial vehicle.
 
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bugsymike said:
Are you sure it is the correct belt etc. as they did different numbers of teeth due to a change in the size of guide and tensioner wheels on the Sofim 2.8 engines, over the years I have had five in Iveco Daily form.
If you give me the 8140.** series number I have the timing book details for them , although if you have got this far that side is probably not a problem.
Are you sure the tensioner spring sat in the water pump is going all the way, not sticking?
I suspect the wrong belt to match the diameters of the jockey/guides/tensioner bearings is the problem.
No chance it has had a 2,5 engine at some time as that would be similar but different belt etc.
There is a further stepped washer as I recall to locate the cam belt cover with out squashing it, but also I suspect to prevent people tightening or loosening the cover and affecting the tensioner side.
The Series number assuming correct engine should be on the bonnet slam panel area along with the weights etc..
Click to expand...
that 8140 number... where do I find it?
 
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bugsymike said:
I am aware of different size guide pulleys on the Iveco Sofim 2.8 engines, which would affect belt length requirements, possibly the OP can compare with old damaged parts?
In the past when I changed them I would buy as a complete kit belt, guides and tensioner bearing so all matched, but sounds harder to buy a complete kit by the sound of it.
Unusual that bearing shattered and tensioner block arm snapped, in all the ones I had I only had one that the bearing was even a little noisy on dismantling, so very unlucky, I trust engine was stationary when this happened otherwise serious engine damage very likely.:(
Re V5c in theory I agree, but no guarantee on 20 + year old commercial vehicle.
Click to expand...
it was stationary. in timed position. just ready for the cover and belt to come off
 
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bugsymike said:
Are you sure it is the correct belt etc. as they did different numbers of teeth due to a change in the size of guide and tensioner wheels on the Sofim 2.8 engines, over the years I have had five in Iveco Daily form.
If you give me the 8140.** series number I have the timing book details for them , although if you have got this far that side is probably not a problem.
Are you sure the tensioner spring sat in the water pump is going all the way, not sticking?
I suspect the wrong belt to match the diameters of the jockey/guides/tensioner bearings is the problem.
No chance it has had a 2,5 engine at some time as that would be similar but different belt etc.
There is a further stepped washer as I recall to locate the cam belt cover with out squashing it, but also I suspect to prevent people tightening or loosening the cover and affecting the tensioner side.
The Series number assuming correct engine should be on the bonnet slam panel area along with the weights etc..
Click to expand...
brand new spring assembly. so is the cambelt pivot arm.
and of course all pulleys.

I get serial number tomorrow am.
 
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Thank you all for your input.
Original sizes in pics attached. They agree with what Communicator said. Belt 149 teeth.

Ended up going to Adam Morey and speaking directly with their parts chap. Full oem kit should be here in 2 days. This Tuesday.

Fingers x all fits as it should.

Thanks for videos jackwhoo!
 

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The aluminium data plate on the vehicle may have engine code 8140.## somewhere
Don't fit a shorter belt unless you are 100% sure it should have a shorter belt as that would lead to excessively high belt tension to start with.

Did you assemble with the larger tension pulley on the tensioner or the smaller pulley on tensioner?
 
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not found a plate earlier today.
all belts fitted up till now were so loose that I could remove them with tensioner released! so belt must be shorter.

rollers supplied with aftermarket kits were 66mm both! which sounds incorrect already.

I will update on Tuesday evening as to what OEM kit dimensions are and how the fitting goes.

OEM kit was just under £300 btw! a bit of a shock, but if it fits correctly, it's kind of worth it.

Cancelled holiday, van left where it shouldn't be for days.... all due to poor part match of aftermarket kits.
with original kit maybe it would've got done in 1 afternoon as planned.

As I say... let everyone know Tuesday evening!

Thanks again!
 
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jackwhoo said:
The aluminium data plate on the vehicle may have engine code 8140.## somewhere
Don't fit a shorter belt unless you are 100% sure it should have a shorter belt as that would lead to excessively high belt tension to start with.

Did you assemble with the larger tension pulley on the tensioner or the smaller pulley on tensioner?
Click to expand...
From my limited experience, I seriously doubt that it would be possible to fit a shorter belt. Freespirit raises the difficulty of sliding the belt over the pulleys in his guide, and he mentions using a waterbased lubricant. If a shorter belt can be fitted, then someting is either wrong, or different.

May I remark, that having seen the condition on the old rollers, I now undertand why they are changed. The rollers that I replaced were in excellent condition, and in view of very low mileage, I am seriously thinking of just changing the belt next time.
 
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GATES GLOBAL ONLINE CATALOGUE

Provides easy access to identify Gates OE quality parts fitting your vehicle, anywhere around the world. Contains detailed information for each part, 360 images, dimensions, diagrams, technical videos, bulletins and installation tips.
navigates.gates.com navigates.gates.com

For 2.8 jtd , two roller sizes, 152 teeth belt. So matches what you removed.

In the link there are not contents numbers in red , click on the number it takes you to technical details.

The complete kit in delivery £65

That is probably what you need , though your vehicle a change over year for different engine variations, if you could find your engine type number you would know for sure
 
Last edited:
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Well, a positive update!

Despite the cost of the OEM kit, it was well worth it. After the stress with incorrect aftermarket ones.

Fitted nice and easy, belt tension correct as soon as the tensioner was released.

youtube links above were great to make sure I'm on the right path.

Running fine!

Massive thanks to all that helped!

Pic with part numbers of the OEM kit. Even description on the rollers is quite helpful as to where they fit.

Thanks again!
 

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