My 1995 540i 6spd has developed a slightly lumpy idle when cold. It disappears when the car heats up. It has also developed a slight whining noise at times.
Although the Nikasil issues weren't a problem here in Oz, I took it to the local stealer with a degree of trepidation, knowing that lumpy idle is a symptom of that problem.
Anyway, they tell me my motor is fine, apart from a leaking PCV/PVC/PVA?? valve or something similar at the back of the motor, which is leaking air, resulting in the lumpy idle and the whining noise.
The fix involves removing the intake manifold, repairing, and putting back together at a cost of some AUD$750 or so.
I have 2 questions:
1) does this sound like a reasonable solution (and cost) to the problem, and
2) while the 'top is off' is there anything else that I should get done as part of recommended maintenance etc?
Comments appreciated.
Cheers