T4 Diesel timing belt kit

[vk2mad]

Bad news. Timing belt intact as is tensioner etc. I am still hoping that somehow it jumped but I don't see that happening. What else could cause sudden compression loss on all cylinders?

[vk2mad]

Vehicle now at repairers. All indications are that timing belt has not slipped and timing was correct. A compression test shows no compression on any cylinder. Repairer now in process of removing head to see what happened internally. He has no idea of what the problem can be at the moment

[gldgti]

I can tell you that it is definitely possible for the belt to jump (even when tensioned properly) but unlikely this has happened.

My next thought would be the crankshaft sprocket: The proper way to do the timing belt is to remove the harmonic balancer/vee belt pulley from the sprocket via the socket head cap screws, leaving the sprocket on the crank nose. However, I know sometimes people will shortcut that by removing the large bolt holding the sprocket onto the crank instead (quick and dirty, but heavy impact driver required).

Having said all that - even though vag-cat parts catalogue shows that the sproket/pulley is 2 parts with socket head capscrews retaining the pulley onto the sprocket, I think (but an not sure) that there are some 5 cylinder engines where its all retained just by the m18 sprocket bolt into the crank nose..... Thats just a hunch Ive got as I remember my dad having some issue with it when he changed to timing belt on his T4 2.5TDI.

[vk2mad]

Big problem. Engine dropped a valve. Bits all through motor and block has been destroyed. Anyone know of a replacement motor? 5 cyl 2.5l diesel is what I need

[Ryeman]

Did the service guy stuff up?.

[vk2mad]

Apparently not. Valve stem broke, the rest intact

[Ryeman]

Apparently not. Valve stem broke, the rest intact

Are you saying a valve simply broke in two for some reason?.

[gldgti]

The only reason that might happen would be impact due to it being incorrectly timed.
Valve stems dont just break for no reason, especially after hundreds of thousands of km. Of it was ever going to fail for no apparent reason it would have happened very early in the life of the engine

[gldgti]

As to the replacement engine.... Seach eBay for your engine code.
Is it an acv?

[Ryeman]

Unbelievable!
litterally!