got a problem with a doblo van that i just cant get my head around

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!

 

head will need to come off,at least a couple of valves will be bent

 

I thought you said fat-so I answered!!
tabetha

 

fix it again tommorow

 

well i removed the head out off frustration thus morning and as i thought there is no damage at all so it was as first thought so does anyone have any info on timing this engine up?

 

Did the crank turn without the head on?

Cancel just noticed it turned with the cam out

 

yes mate even with the cam in i could get a full rotation off crank by turning camshaft abit mate it really pissing me off as i done hundreds off cam belts but just can't get my head round this?

 

dunno if this any help mate..only a quick google search if its right engine or not..
http://www.fiatforum.com/punto/19733...e-engines.html

 

no mate thats a petrol engine i have spent ages on google and have posted it on fiat forum as well but thANKS FOR LOOKING

 

ok sorry mate

 

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!

 

It didnt bend any valves? suprising! oh well least its fixed. BTW a belt runs on a pulley not a sprocket , they are for chains