Started the thread below, now a month on wanted to come back with an update and more advice it's getting worse!

Analysis of the problem has now revealed that there is metal in the engine and they removed what appears to be a wheel balance weight from the oil sump and there were metal shavings through the top of the engine.

We're now talking to the insurance company about what is covered as this is going to be a very expensive exercise. Everyone is aking how it happened - i have no idea, nobody does.

Details of the report from VW below....

RATTLE FROM ENGINE
CYLINDER 1 MISSFIRE
ASSESSED VEHICLE FOR WARNING LIGHTS ON DASH & RATTLE
COMING FROM ENGINE - CARRIED OUT COMPUTER DIAGNOSIS &
FOUND MISSFIRE IN CYLINER 1 - CARRIED OUT COMPRESSION TEST
& FOUND LOW COMPRESSION IN CYLINDER 1 - REMOVED ENGINE FROM
VEHICLE - REMOVED TRANSMISSION TO CHECK CHAINS & TIMING -
FOUND TIMING SLIGHTLY OUT - REMOVED CYLINDER HEAD & FOUND
DAMAGE TO CYLINDER 1 & CYLINDER 3 PISTONS - CAUSED BY
FOREIGN OBJECT - REMOVED SUMP TO REMOVED PISTONS & FOUND
WHEEL WEIGHT IN SUMP. SUSPECT A WEIGHT HAS GONE THROUGH THE
INTAKE & CAUSED ENGINE FAILURE. VEHICLE REQUIRES NEW ENGINE
DUE TO PISTONS, HEAD & BLOCK DAMAGED.




Original Post:

Compression loss cylinder one
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. Now 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.