VANOS UNIT ???

[Bismark]

HI GUYS. ANYONE HAD THE VANOS UNIT REPLACED ?? MINE IS AN '01 WITH 70 K MILES. I FEEL A VERY SLIGHT LOSS OF POWER AND A MINUTE DETERIORATION IN THE SMOOTHNESS ON ACCELERATION. I'VE READ THAT THE SEALS IN THE VANOS PISTONS START DETERIORATING, CAUSING A LESS THAN OPTIMUM EFFICIENCY IN THE VALVES TIMING. ANY IDEAS ?? THANKS.

[yd_dc]

have the same problem .. have replaced vanos disks on 01 4.4 but didnt solve the prob. on v8 there is no seal to replace unlike other mdels, just entire disk.
still couldnt figure out what pbm is

[mrbmwx5]

Lots of people blame VANOS for just about everything. I dont think this is one of those times,though,The problem you discribe is almost always the result of a LAZY or DIRTY idle control valve and/or small vacuum leaks in the intake system due to crack or broken air hoses.
The car also need a basic tune-up. Any time you have a driverbility problem on a mature BMW, you first have to ask how many miles are on basic tune-up parts.
A BMW should have new spark plugs,air filter and fuel filter every 60,000 miles.

[Werewolf]

See below--the site has a symptoms / test section. See if it matches up to your situation

Beisan Systems

I replaced my VANOS o-rings last week. Happy to talk you thru it if this is the right repair for you

Is your car throwing up CEL codes?

[yd_dc]

as mentionned earlier seals can b changed for 6cylinders, not 8

[toddj]

I'm getting my "engine service light" on my 01 X, with the code P0015 which indicates issues with my vanos unit... The vehicle runs ok, but the light comes and go's...
I'm going to try and tackle this myself, I guess I would like to see some input on if it's the unit or just the o rings taht need replacing... Has anyone purchased the special tools required???

[yd_dc]

for info the special tool needed ifor v8 vanos is different that for v6s

[toddj]

2001 X5, V6...................

My mistake...

[Bismark]

needs to rebuild the vanos. check the Beisan systems. It works, I've replaced the seals and I am pleased with results.