Compression loss cylinder one

[SilverWagon]

2007 v6 passat, 45k km

Short version...
car loss power, rough at idle, was throwing an error code saying cylinder 1 was not firing properly

Long version...
Coincidently (or not) had the cats changed two days before at hitech in darlinghurst sydney. When i took it back and we put it on the hoist we could hear that the cats were fine and there was now a new problem. A rattle from further up front in the engine

VW now has the car, they did the usual checks - spark plug, leads, coils and still the problem. They did a compression test and cylinder one has lost compresssion. How they are pulling the head off (10 hours labour).

Has anyone heard of this problem before or got any ideas. The car has pretty low km and is not driven hard very often as it's my wifes.

[h100vw]

Did they squirt oil in the bore to see if the rings seal? Or do they know a valve is burnt or something?? I would have thought half a day to remove and the same to refit.

I'd say not common, but expect some smart Alec to pull me up.

Gavin

2007 v6 passat, 45k km

Short version...
car loss power, rough at idle, was throwing an error code saying cylinder 1 was not firing properly

Long version...
Coincidently (or not) had the cats changed two days before at hitech in darlinghurst sydney. When i took it back and we put it on the hoist we could hear that the cats were fine and there was now a new problem. A rattle from further up front in the engine

VW now has the car, they did the usual checks - spark plug, leads, coils and still the problem. They did a compression test and cylinder one has lost compresssion. How they are pulling the head off (10 hours labour).

Has anyone heard of this problem before or got any ideas. The car has pretty low km and is not driven hard very often as it's my wifes.