Replacing VANOS solenoid valves woke up my N62!

[dadysev]

Originally Posted by fishhouse4

School me...how does the solenoid work exactly? Guessing it gets input from the wiring harness on the front (the part that sticks out)...but oil runs through the other end that is inside? For what purpose...like what does the solenoid do specifically to make all this fancy VVT function.

I'll try to attach the N62 Pdf.
Basically the the Vanos solenoids open up in a chamber in the head, one for exhaust, and one for intake, based on when the DME (engine computer) need to the timing of the cams to advance or retard for more power and smoother operation through the whole power band (in a nutshell). lol

Now if the seals are bad or leaking the full oil pressure will not make it up to the vanos cam units to advance or retard the timing, resulting in power loss, and other things.

Here's a good PDF that explains the operations :

http://www.internetsomething.com/lpg...2%20Engine.pdf

[dadysev]

Originally Posted by ajacks8

Thanks! Do you need both sets of O-Rings, or just 4 of the larger. It looks like NEW genuine solenoids already come with the smaller one attached. Also, I scored 4 solenoids (pn #11367560462) for $120.99 apiece. I pulled the trigger on 4 after trying to get a few other vendors to price-match. I soon learned that this was less than cost, so I could not resist purchasing. Right after I hit submit order, they were jumped back up to $167.99. Interesting, right??? RealOEM shoes $118.xx...a little hard to figure why. Anyway, hopefully I only need the larger O-Ring for replacing with new solenoids. Thanks.

If you are getting new solenoids, then they should come with both orings. The big one seals it into the front of the timing cover, the smaller one seals the main oil gallery where the oil is sent up to the vanos actuators on the front of the cams.
Now i believe the most important one is the smaller ones. Mine were kind of brittle when i took them off.
And btw..... My N62 motor has now woken up and is working amazing again after the cleaning and new Orings!

[ajacks8]

Thanks! Sounds like I should be able to replace these easily. Should I hold them for the future or is 112k miles a good time to replace as preventative maintenance?


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[dadysev]

Originally Posted by ajacks8

Thanks! Sounds like I should be able to replace these easily. Should I hold them for the future or is 112k miles a good time to replace as preventative maintenance?


Sent from my iPhone using Xoutpost.com

"If it ain't broke, don't fix it!"
I had to do mine as i did my timing cover gaskets when i did my valve cover gaskets. Once you remove them solenoids those seals are pretty much done, especially with higher millage. Think of it like the VCG. Once you take those off you can't reuse them after some time they take shape and harden.