Thanks for sharing your experience.
I know that it's harmless, even says that in the BMW service bulletin for the new accumulator but when you park and restart the car later, the racket is unbearable. Funny thing is that it doesn't always happen but rather sometimes.
I already bought parts for the new accum install so I'm committed at this point. I'm curious to experience it firsthand and new parts won't hurt anything else than my wallet.
When I run DIS Vanos test, the bank 2 passes every time while bank 1 fails either at inlet advance or exhaust advance by 0.1-0.2 deg.
I pulled bank 1 solenoids again last week and gave them a good clean to see if it will make any difference. The brake cleaner was shooting out nicely on all 4 solenoids and I used air compressor 115 psi to blow them out. The clicking while opening and closing sounds good to me across the board. Didn't make any difference and test results were the same.
I can try swapping solenoids from bank 2 to bank 1 but this likely has something to do with timing and not solenoids. I have no codes and the car is running perfectly so I'm not gonna chase a problem where there isn't one. DIS test is sensitive anyway and I can try your advice to hold the rpms higher and it might pass but I didn't try this yet.
I'm slowly doing research and collecting notes to overhaul Vanos units next winter, install updated spring plates and check cam timing. Car is at 111k miles and I think it would benefit from this.
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