[Crasher]

I suspect you have the valve timing incorrect, it is difficult to set up, you need locking tools and front crankshaft pulley modifications and if you don't use the correct pulley holding tool whilst tightening the bolt, the timing will move. These CAY(x) engines are a disaster and blow pistons because people use 95RON fuel when they should use 98RON but the revised pistons help them cope.

 

[Crasher]

The BMY isn't quite as bad as the later CAVD but still an awful unit; I dread working on them but my mechanic is a sadist and loves them, his Golf 5 has the 170PS BLG where the wick is turned even further up on exactly the same parts.

 

[Crasher]

The timing is easy to check, fit a dial gauge plug adapter and calibrate it so it hits 0 at TDC, fit the crank pin and turn until it hits where the dial gauge must be bang on zero

 

[Crasher]

There is a hole in the back of the block where you take out a bung and screw in a stop bar which hits the crank web and SHOULD leave the number one piston at TDC at which point the cam plate must engage without any fiddling.

 

[Crasher]

The diamond ring and spacer conversion are part number 03C 198 159 A and costs £58.62 but if you have to take it apart again (as I did at least five times on the last CAVD, which WILL be the last I do) you can buy the washer on their own. Don’t forget the O ring that goes inside the bush and that every single bolt on this system is one time only. I assume you have discovered the inlet cam VVT hub bolt is left hand thread? I absolutely hate working on these after that horrid exI had at the beginning of lockdown, I never could find out what was wrong.

 

[Crasher]

You fitted a new crank oil seal without the special jig?

 

[Crasher]

Please also start your own new post in the appropriate forum and include a full car code scan and the VIN plus a story.