list of reasons 1z timing could slip

[dubpirate]

any ideas as mine has done

thanks dan

[tweed]

old belt and tensioner giving enough slack to jump

[dubpirate]

wicked pal so if i get a genuine vag kit belt and tensioner

should be fine

[tweed]

I would check history to see when it was last changed. If you cant find anything then get a cam belt kit 

[dubpirate]

was done just before i got it

ran ok then gradually got worse then wouldnt start

took it to a diesel specialist

he saw a wobble on bottom pulley so he did than new from vag

and relined the timing said it was 2 teeth out

so i got it back started streight up and did so for about 4-5 days

the started to turn over alot before starting again and now we are back to the start

it seems to be back to stage one

now when i have been booting it a bit anything over 2500k revs it rattled loudly from the engine bay

im guessing the timing has slipped

as it will start but has to turn over for about 30-seconds to a minute (loads a smoke)

so i have bought a genuine vag cambelt kit with tensioner

i believe that rattle was the tensioner as that also had a wobble on it

any thoughts guys

[Wayne]

Could be a worn crank if the pulley has been allowed to run a long time whilst loose.

[dubpirate]

the mechanic replaced the old bottom pulley

showed me it it had slight wear

only slight tho

he replaced it with a new one

he is a diesel specialist

so im sure he would of noticed if the crank was worn

[Wayne]

the mechanic replaced the old bottom pulley

showed me it it had slight wear

only slight tho

he replaced it with a new one

he is a diesel specialist

so im sure he would of noticed if the crank was worn

Well I would get it rechecked, you may find the key slot has worn.

[dubpirate]

does this mean new engine :-(

[Wayne]

does this mean new engine :-(

Yes or a rebuild with a new crank.