Quote:
Originally Posted by fishhouse4
I'm not entirely sure what the VANOS solenoid valves do exactly...but I replaced all 4 on my 4.8is N62 as part of some recent upgrades (also did new NGK Iridium IX plugs, ignition coils and serpentine belt earlier in the day).
To my surprise the new VANOS solenoids had an awesome improvement to my engine responsiveness. Best way to describe it is that it's SOOO much more smooth now.
Previously I had a lag or delay after giving it gas (either light or WOT). After applying throttle it would just think about it for a second but then suddenly kick it and jerk your head. Now it's accelerating evenly and more quickly like I always expected it to. Seems more "peppy" on the butt dyno.
Am I going crazy?  |
Thanks!! I'm facing the same issue on my E70. I think it may be the inner O-rings on the solenoids as the seal up the oil from the inner timing cover to the vanes chamber that goes up to the actual vanos on the cam. No faults or anything. Sometimes at low rpm, if i just tap the throttle at little to accelerate 5km faster i hear a slight ping/knock also. Almost feels like out of timing slightly= Vanos!!
Failing that i will probably just replace the solenoids that come with new orings anyways, but for now this is a 20$ fix.