Member, P500 Sport, DSC On (>700)
Join Date: Dec 2014
Thanked 55 Times in 55 Posts
While I laud your efforts, and those of others, I believe that this is a near impossibility. There are two many factors to cross-reference and eliminate. And even if the "main difference" is found between the S85 and S65 that leads to E60s eating solenoids for lunch, there is still the matter of resolution. Just look at throttle actuators. It's quite obvious just from my own ridiculously simple encounter with them that the circuit board dies slowly, by degrees. As it gets worse, it leads to creating a short across the motor contacts - but only in one direction. There has to be a diode somewhere in there....
None of this would matter, if they could still be cleaned. But even that seems impossible for these VANOS solenoids. I wonder if the manufacturer could share any insight into how to clean them or to keep them working longer?
Anyhow, I'm still going to stockpile solenoids where I find them at reasonable prices.