2008 328i vanos solenoid burned?

Nap · 10-21-2019, 03:43 PM

I decided to take out my vanos solenoids today due to the car rough idling. There looks like something is caked on the side of it and it will not come off. I assume it is burned, it kind of looks burned right? The other solenoid has a similar spot but not nearly as big. Btw the car is throwing no codes.

relative4 · 10-21-2019, 10:16 PM

Completely normal, and worn VANOS solenoids don't cause rough idle. Check shadow codes, watch fuel trims, smoke test, look at cylinder smoothness.

Nap · 10-22-2019, 06:24 AM

Quote:

Originally Posted by relative4

Completely normal, and worn VANOS solenoids don't cause rough idle. Check shadow codes, watch fuel trims, smoke test, look at cylinder smoothness.

I know a lot of things can be causing the rough idle. Youtube videos claim that for a rough idle it's good to clean the vanos solenoids first. They say it fixed it for them most of the time.

relative4 · 10-22-2019, 08:05 AM

Well if you saw it on YouTube, then it must be true.
Cleaning parts at random is much better than replacing parts at random, but it's a far cry from diagnosis.

10-21-2019, 03:43 PM	#1
Nap Private 18 Rep 57 Posts Drives: 2008 328i Sedan Join Date: Jun 2019 Location: U.S. iTrader: (0)	2008 328i vanos solenoid burned? I decided to take out my vanos solenoids today due to the car rough idling. There looks like something is caked on the side of it and it will not come off. I assume it is burned, it kind of looks burned right? The other solenoid has a similar spot but not nearly as big. Btw the car is throwing no codes. Attached Images Last edited by Nap; 10-21-2019 at 03:51 PM..
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10-21-2019, 10:16 PM	#2
relative4 Major 611 Rep 1,272 Posts Drives: '08 335xi E90 MT stage 1+ Join Date: Feb 2019 Location: Denver, CO iTrader: (0)	Completely normal, and worn VANOS solenoids don't cause rough idle. Check shadow codes, watch fuel trims, smoke test, look at cylinder smoothness.
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10-22-2019, 08:05 AM	#4
relative4 Major 611 Rep 1,272 Posts Drives: '08 335xi E90 MT stage 1+ Join Date: Feb 2019 Location: Denver, CO iTrader: (0)	Well if you saw it on YouTube, then it must be true. Cleaning parts at random is much better than replacing parts at random, but it's a far cry from diagnosis.
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