Is there a good solution to the vanos problem?
To correctly address the vanos problem the piston O-rings need to be replaced with O-rings made from higher grade material. BMW has been engaged on this subject and has elected to not address the issue, “No further development will be done”. To replace the piston O-rings on a vanos requires removing the piston Teflon seals to access the underneath O-rings. Removing the Teflon seals necessarily damages them, thus both the O-rings and Teflon seals need to be replaced. Beisan Systems (www.beisansystems.com) provides vanos seals kits that include both the upgraded O-rings and Teflon seals. Repair procedures are also provided for reference.
