General cambelt failure on a jtd

Currently reading:
General cambelt failure on a jtd

mikelotus

New member
Joined
Jul 23, 2008
Messages
26
Points
15
Hi there the cam belt has gone on my car.

Should i strip it down and assess the damage or just replace the engine ?

I can do all the work myself.

What damage is likely to have been done ?

Thanks

Mike
 
Hi.
The question you have to ask yourself is, am I feeling lucky.
I had the same thing on a Vauxhall, stripped the head off replace three valves and rebuilt it no sign of any other damage, but the car didn’t run right when it was rebuilt, it was shaky and hesitant on acceleration.
The conclusion was that the impact had bent a conrod; I have done other cam belt impact repairs that have been fine.
Personally I would have the top off and see how much damage has been done, then price up the parts and time involved for the repair then price up another engine.
If the price of a used engine is close I would go for that. It’s a gutter when you do all that work and it’s no good.
Good luck.
 
Hi there it's actually my ex partners car so i haven't got the bill.

It's done 82,000 miles on an 02 plate. i've been telling her to get it done.

It's a long story but i've actually got a jtd engine / box minus the turbo sitting on the floor at a storage place.

Based on your comments it's probably easier to change the engine and then look at the other one at a later date.

There's a knackered engine on ebay (bad bottom end) that isn't to far away from me i might buy that and make a good engine up out of the two units.

Will have to have a think about that.

Thanks for the advice.

Mike
 
Hi there thought i'd give you all an update.

Finally stripped the engine and got the head off to find the valves have just kissed the pistons and it has damaged two exhaust valves only so very lucky.

Measured all the pistons from the top of the block and all the same deck height so no problems there.

Quick question as all the new bits come to nearly £200 to repair it can i reuse the head bolts or do i have to replace them ?

I know that on some engines you can use them up to three times ?.

Also can someone tell me how to time the engine / cam / pump or point me in the right direction ?.

Thanks

Mike
 
Quick question as all the new bits come to nearly £200 to repair it can i reuse the head bolts or do i have to replace them ?

I know that on some engines you can use them up to three times ?.

Also can someone tell me how to time the engine / cam / pump or point me in the right direction ?.

Thanks

Mike

There's no mention in eLEARN about requiring new cylinder head bolts for either the 8v or 16v JTD engine (don't know which you have), although for both versions, the bolts are tightened in angular stages and it's usually recommended to replace bolts tightened using this method.

Camshaft timing method differs for the 8v and 16v versions.

For the 8v, there's a mark on the camshaft sprocket and a pointer on the plastic housing.

If you have the 16v version you will need locking pins to time the 2 camshafts.

The crankshaft sprocket is timed using a Fiat special tool fitted to the sprocket and one of the oil pump bolts. Part number of the tool is 1860905000, about £14 from Fiat.

Some timing belt manufacturers, including Gates and Dayco, mark the belt with 3 white lines. You could use the appropriate 2 of these lines to set the crankshaft sprocket if you don't want to buy the Fiat tool.

The fuel pump on JTD engines is purely a high pressure pump so doesn't need timing. You can fit the belt on it anywhere.
 

Attachments

  • Cam Sprocket.JPG
    Cam Sprocket.JPG
    257.1 KB · Views: 48
  • Crank Sprocket.JPG
    Crank Sprocket.JPG
    1 MB · Views: 46
  • Cam Line.JPG
    Cam Line.JPG
    788.4 KB · Views: 39
  • Crank Line.JPG
    Crank Line.JPG
    727.8 KB · Views: 41
Last edited:
I've never worked on the JTDM engine but looking at the procedure in the Grande Punto eLEARN manual, it's the same except the crankshaft sprocket setting tool is slightly different because a different design oil pump is fitted to the JTDM engine.
 
I've never worked on the JTDM engine but looking at the procedure in the Grande Punto eLEARN manual, it's the same except the crankshaft sprocket setting tool is slightly different because a different design oil pump is fitted to the JTDM engine.

Is there no end to this mans knowledge ..... (y)
 
Some timing belt manufacturers, including Gates and Dayco, mark the belt with 3 white lines. You could use the appropriate 2 of these lines to set the crankshaft sprocket if you don't want to buy the Fiat tool.

Does OEM belt have theese marks?
 
There's no mention in eLEARN about requiring new cylinder head bolts for either the 8v or 16v JTD engine (don't know which you have), although for both versions, the bolts are tightened in angular stages and it's usually recommended to replace bolts tightened using this method.

Camshaft timing method differs for the 8v and 16v versions.

For the 8v, there's a mark on the camshaft sprocket and a pointer on the plastic housing.

If you have the 16v version you will need locking pins to time the 2 camshafts.

The crankshaft sprocket is timed using a Fiat special tool fitted to the sprocket and one of the oil pump bolts. Part number of the tool is 1860905000, about £14 from Fiat.

Some timing belt manufacturers, including Gates and Dayco, mark the belt with 3 white lines. You could use the appropriate 2 of these lines to set the crankshaft sprocket if you don't want to buy the Fiat tool.

The fuel pump on JTD engines is purely a high pressure pump so doesn't need timing. You can fit the belt on it anywhere.


Hi i'm trying to find out the torque settings and tightening procedure for JTD 105 head bolts ? Any help would be appreciated. :)
 
Back
Top