[ard]

So far I know there are electrical and mechanical components of Vanos.
Electrical failure --> computer code will flash, SES light
Mechanical failure --> loss of power, bumpy idling / revving.

What is the worst case scenario that can happen when there is faulty Vanos. Will it cause bent engine valve? If so, how?

What is the protocol for BMW US to decide when to replace the Vanos? In Australia here, I was told that they can just recommend to replace the Vanos if it is noisy, because noisy Vanos means that there is no enough oil pressure in the unit.

Thanks

Nelson

Isn't there a history here???????

You are asking a question without an answer.

In the US, they replace the VANOS when the GT1 indicates a bad Vanos. A dealer can recommend anything they damn well please... this is especially true when WHO is paying can be a subject of disagreement.

Is yours noisy, is the valve bent, is there a few pages of 'story' behind this?

I won't post the links to your long stories of woe, but rather ask that you do the members here the courtesy of posing a question in context. Bring up the old threads, with all the background, and ask for help with the next step.....

Geez...

 

[ard]

(4) We have been advised by the repairer that there are no checks that can be made on the Vanos unit itself to ascertain the position of the exhaust camshaft position actuator. It would also be timely to mention the oil and metallic swarf as other contributing factors to the Vanos malfunction. The Vanos unit is normally replaced as a complete assembly.

This may be the crux of the issue.

The BMW dealer that trashed your motor told the inspector "the position of the vanos cannot be ascertained prior to insertion".... they are therefore claiming the vanos was 'bad', they installed it, and it damaged the motor when it 'realigned'.

Had you posted this in your other threads, all the knowledgeable people who had posted in there might have received an update (perhaps an email notice) and could have replied.... In reading on VANOS (and on Phillym5's comments) you can, actually, check the valves and vanos psotions when you set the timing.

Hans doesn't understand how vanos work- nor does your dealer- and the dealer has led Hans down the path they want.

I suspect they are lying about 30 minutes of running. I wonder of there were any DME tests that would show operating hours prior to, and just after, the 'event'.

My 2 cents.

You will now get a rash of people's opinions on their VANOS problems, but might not get the attention of the folks that had weighed in on the other threads...

 

[ard]

PS I think the VANOS psotion CAN be checked, I think the position of the actuators CAN be checked, and I'd try to find the actual BMW repair procedure in which they MAY provide explicit instructions about this...