E60 M5 Vanos Issue
Discussion
Just got the car back from the garage following a check into a rough idle problem.
The dealer hasn't yet finished the diagnostics as they need to order a tool from BMW to check the Vanos oil pressure but it seems that there are several fault codes relating to the Vanos system.
Just wondered who else has seen this problem, what the solution might have been and if there were any warranty issues.
For info it's a 55 plate car and so far no issue with Mondial re the warranty covering the work.
Thanks
The dealer hasn't yet finished the diagnostics as they need to order a tool from BMW to check the Vanos oil pressure but it seems that there are several fault codes relating to the Vanos system.
Just wondered who else has seen this problem, what the solution might have been and if there were any warranty issues.
For info it's a 55 plate car and so far no issue with Mondial re the warranty covering the work.
Thanks
Rough idle - always difficult one to explain and my original post wasn't spectacularly clear.
I noticed a few weeks ago that when idling in neutral, engine rev pick up under gentle throttle pressure resulted in some cyliners appearing to misfire - that "lumpy" feel. Afeter 3000 rpm or so you can't really feel it but it also does it on the way back down to idle.
I thought that it might be some sort of air sensor issue but that doesn't appear to be the case.
The main dealer tells me that there is a vanos fault code and that the engine is a little down on power - still ok to drive though.
Sadly, I won't know for certain for another 10 days or so as they need that long to get a special tool from Germany.
The only good news is that I recently switched to a monthly warranty deal with no excess, from an annual policy with £250 excess, so very glad I made that choice.
I noticed a few weeks ago that when idling in neutral, engine rev pick up under gentle throttle pressure resulted in some cyliners appearing to misfire - that "lumpy" feel. Afeter 3000 rpm or so you can't really feel it but it also does it on the way back down to idle.
I thought that it might be some sort of air sensor issue but that doesn't appear to be the case.
The main dealer tells me that there is a vanos fault code and that the engine is a little down on power - still ok to drive though.
Sadly, I won't know for certain for another 10 days or so as they need that long to get a special tool from Germany.
The only good news is that I recently switched to a monthly warranty deal with no excess, from an annual policy with £250 excess, so very glad I made that choice.
ecain63 said:
Well thats a new one on me. Praise be to the peepes at Mondial for thier continuous unwavering coverage. I hope you get it sorted but in the meantime could you write up a little report on it so i can stick it up in the buyers guide?
Eddie
EddieEddie
Will do - the dealer - Snows of Portsmouth seem pretty friendly, so I'll see if I can get plenty of detail.
May be a couple of weeks though
Andrew
Air Support said:
ecain63 said:
Well thats a new one on me. Praise be to the peepes at Mondial for thier continuous unwavering coverage. I hope you get it sorted but in the meantime could you write up a little report on it so i can stick it up in the buyers guide?
Eddie
EddieEddie
Will do - the dealer - Snows of Portsmouth seem pretty friendly, so I'll see if I can get plenty of detail.
May be a couple of weeks though
Andrew
Eddie
Hi Air,
Long time listener, first time caller so go easy on me
I had what sounds like a similar problem with a 2005, 90K miles M5. The car would idle unevenly at standstill and oscasionally cut out. It took a few trips to the dealer to sort. They ended up replacing the vanos solenoids and cleaning the throttle valves.
Initially they replaced 2 solenoids and said all was ok - but problem still occured. It took a software upgrade for the second set to show up faulty on thier tests. Cleaning the valves apparently should have been done during a regular service but was missed. Car is now using a lot less oil, which I put down to the solenoids and torque-ier/smoother thanks to the cleaning.
Solenoids were covered by warranty but had to pay labour for the valves.
Long time listener, first time caller so go easy on me
I had what sounds like a similar problem with a 2005, 90K miles M5. The car would idle unevenly at standstill and oscasionally cut out. It took a few trips to the dealer to sort. They ended up replacing the vanos solenoids and cleaning the throttle valves.
Initially they replaced 2 solenoids and said all was ok - but problem still occured. It took a software upgrade for the second set to show up faulty on thier tests. Cleaning the valves apparently should have been done during a regular service but was missed. Car is now using a lot less oil, which I put down to the solenoids and torque-ier/smoother thanks to the cleaning.
Solenoids were covered by warranty but had to pay labour for the valves.
Dave
Thanks for posting
Eddie
Should be getting the car back tomorrow morning from the dealer.
It seems the issue was caused by a problem with the high pressure oil supply to the Vanos system.
I'll try and get more details tomorrow and post them on here.
The good news is that it looks like the work is going to be covered via the Mondial warranty.
Thanks for posting
Eddie
Should be getting the car back tomorrow morning from the dealer.
It seems the issue was caused by a problem with the high pressure oil supply to the Vanos system.
I'll try and get more details tomorrow and post them on here.
The good news is that it looks like the work is going to be covered via the Mondial warranty.
FINAL REPORT!
So the outcome is as follows.
It seems that the problem with the Vanos was caused by a faulty high-pressure oil transfer pipe which provides high pressure oil to activate the Vanos system. This should operate at (I think) 90 bar but was only delivering at 20 bar due to a split. The technician's view was that the Vanos wouldn't have been activating at this pressure.
The pipe was replaced and all is fine and the car does seem more responsive in the mid-range.
In total, there were about two days of investigation and two days of rebuild, so I reckon 15-20 hrs labour minimum plus the part, oh and a test adaptor that had to be ordered from Germany to test the Vanos oil pressure.
Extremely grateful for the Mondial zero excess warranty right now!
So the outcome is as follows.
It seems that the problem with the Vanos was caused by a faulty high-pressure oil transfer pipe which provides high pressure oil to activate the Vanos system. This should operate at (I think) 90 bar but was only delivering at 20 bar due to a split. The technician's view was that the Vanos wouldn't have been activating at this pressure.
The pipe was replaced and all is fine and the car does seem more responsive in the mid-range.
In total, there were about two days of investigation and two days of rebuild, so I reckon 15-20 hrs labour minimum plus the part, oh and a test adaptor that had to be ordered from Germany to test the Vanos oil pressure.
Extremely grateful for the Mondial zero excess warranty right now!
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