Do JTS engines eat valves if belt fails? - Alfa Romeo Forum
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Do JTS engines eat valves if belt fails?

2l jts 107k. The pulley on the inlet cam has shattered into bits throwing off the belt at the same time. Will the valves all be bent or is there any hope? It looks like the pulley has come loose first as the mounting holes have all gone oval & there is 3 out of 4 allen bolts left loose on the cam, one missing. Could this be poor work when I had the belt & variator done 7k miles ago or just bad luck?
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Your chances of not having bent vales are virtually zero I am afraid.

Not only that you really need to get the big end shells changed as well, as the shock of the pistons hitting the valves transfers down to them. This often causes failure of them shortly afterwards.


It does sound like poor work, I hope you have a receipt as you may be able to take the garage to task over the repair.


My Fiat coupe suffered a similar problem. 15k after the cambelt was changed it slipped due to the garage bodging the tensioner fitting.

However the belt slipped after I sold the car so i don't know whether the new owner was able to take the garage to task over it.

Giulietta 2.0JTDm (170)
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Quote:
Originally Posted by Jez in Devon View Post
...Will the valves all be bent...
Yes

Quote:
Originally Posted by Jez in Devon View Post
Could this be poor work when I had the belt & variator done 7k miles ago..?
possibly yes
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Any idea on a ballpark figure to redo the head? I guess you need to take the head off to tell if there is valve damage
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yes and you will need to change the crank bigend bearings also otherwise they will fail 6 months down the line...
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yes and you will need to change the crank bigend bearings also otherwise they will fail 6 months down the line...
No they won't......it'll be about two months in my experience.....
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No they won't......it'll be about two months in my experience.....
I guess how long they last is someway related to the speed at which the engine was turning when the belt snapped/slipped.
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