doblo 1.9diesel timing mark problem

[dobloman101]

hi all i recently had the timing belt snap on my 2002 doblo 1.9 non turbo diesel and after checking the valve clearances i belive the to be no damage as the van was just idleing at the time.

however i have attemted to fit a new cam belt in order to try it and can't seem to find the correct timing marks? i have timed the engine up useing the yellow lines on the cam belt but the engine just locks up when turning it over by hand?

now i thought maybe there was some damage which was stopping the engine from turnng over so i removed the cam shaft allowing all the valves to shut and trned the engine by hand which appears to be fine and feels like there is good compresssion there.

so any ideas? if i sent the crank to what marks i belive are tdc and aet cam to the mark the camshaft lobes are pushing a valve open on number 4 cylinder which just seems wrong so any advice would be massively gratefull before i pull the head off!

 

[Ffoxy]

Welcome to The Fiat Forum!

If it were my car I'd have the head off first... even at idle you can do enormous damage with a broken cam-belt.

What you find may influence your decision to fit a belt or replace the motor.

 

[dobloman101]

as suspected it just a timing mark issue can anyone help i have removed the head today out off frustration only to find everything perfect as i thought so does anyone have any idea on timing marks on this engine!

 

[cc1]

I think you might have to buy a valve timing tool set.

 

[dobloman101]

problem solved when the tensioner let go the belt become slack and the timing jumped causing valve to piston contact and the result was the cam shaft sprocket has moved and snapped the keyway causing the timing issue all running sweet again now!