M5 2013 has Blue Smoke

[Mohammad Ghanayem]

Hi All

my M5 F10 with 142K mileage, recently emitting blue smoke, if i keep the car running for 5-10 mins and then press the fuel pedal, it creates blue smoke from tail pipes then stopped.
can any body advise here?

[M5Rick]

These symptoms are mainly caused by valve seals leaking and/or oil carry over from the crank case ventilation, also check PCV valves on either side on top of the engine.

[Mohammad Ghanayem]

actually, i am going now to replace old PCV valves to exclude them from my case,
NOW, if the smoke still there; can we have certain tested additives can be added to stop the Smoke?

[M5Rick]

After replacing PCV's and smoke remains have a compression and leak down test done, these done should point you in the right direction.. I don't think any oil additives are a permanent solution.

[AHall]

Originally Posted by M5Rick

After replacing PCV's and smoke remains have a compression and leak down test done, these done should point you in the right direction.. I don't think any oil additives are a permanent solution.

Or even advisable. Do these cars require the engine to come out to change the valve seals? Sounds like valve seals since the smoke is not constant.

[M5Rick]

Originally Posted by AHall

Or even advisable. Do these cars require the engine to come out to change the valve seals? Sounds like valve seals since the smoke is not constant.

Some trick jocks can do it with the PU in situ, saw it somewhere but you'll have to look for it.

[Mohammad Ghanayem]

Unfortunately, PCV valves have been changed, Still, the Blue smoke is there !!!!
as per the Mechanic guy, he found some leaks inside turbo (left one) .. in the pipe connected to Air intake, could this be the reason behind the smoke? while i noticed the smoke came from 4 exhaust tips the same ..

[M5_Raz]

Sounds like turbos are on their way out, at that mileage I believe it. Many have failed under 100k miles.

[JayDD007]

Originally Posted by AHall

Or even advisable. Do these cars require the engine to come out to change the valve seals? Sounds like valve seals since the smoke is not constant.

Definitely sounds like valve stem seals. Unfortunately engine removal is required (along with quite* a few special tools) since these engines have Valvetronic.

[Mohammad Ghanayem]

means i don't need to change Turbos firstly?? and to go directly with Valves seals replacement

[M5Rick]

Originally Posted by Mohammad Ghanayem

means i don't need to change Turbos firstly?? and to go directly with Valves seals replacement

Unfortunately it's one of those things with these engines where strip down as you go is the only way, I'm guessing with the mileage it's more likely valve seals but you just have to go with what mechanic sees is most likely or just drive as it is if it's running fine otherwise and check the oil level more frequently.

[Mohammad Ghanayem]

actually, the car is running fine, but finally, smoke gives you bad spirit !!! M5 with Smoke

[M5Rick]

Diesels emit smoke so if it were mine I would just keep driving it as is but without 'thrashing' it.

[Mohammad Ghanayem]

Hi All

recently, my car has a new issue, Once you are driving on Auto mode, 120Km/h, then suddenly you press the fuel pedal (kick down), it comes like dead, no response, RPM needle became down (like the Car turned off), then starts acceleration on 5th gear ...

do anybody face the same ? lazy response

[Mohammad Ghanayem]

any good news here Guys ....

[M5Rick]

Originally Posted by JayDD007

Definitely sounds like valve stem seals. Unfortunately engine removal is required (along with quite* a few special tools) since these engines have Valvetronic.

Yes, another technician was saying the tool required to remove valve seals won't fit in with the engine in situ.

[Mohammad Ghanayem]

Originally Posted by M5Rick

Yes, another technician was saying the tool required to remove valve seals won't fit in with the engine in situ.

i meant this query

Hi All

recently, my car has a new issue, Once you are driving on Auto mode, 120Km/h, then suddenly you press the fuel pedal (kick down), it comes like dead, no response, RPM needle became down (like the Car turned off), then starts acceleration on 5th gear ...

do anybody face the same ? lazy response

[M5Rick]

Originally Posted by Mohammad Ghanayem

i meant this query

Hi All

recently, my car has a new issue, Once you are driving on Auto mode, 120Km/h, then suddenly you press the fuel pedal (kick down), it comes like dead, no response, RPM needle became down (like the Car turned off), then starts acceleration on 5th gear ...

do anybody face the same ? lazy response

I had this with my Merc C Sport before, the throttle actuator was not working temporarily, then after switch off and wait it worked fine. Damn dangerous if turning right and it stops working.

[Mohammad Ghanayem]

some body answered me for this case, it is due to bad flywheel ? is it logic ?

[M5Rick]

I doubt its flywheel. As the car is burning oil I would suggest checking the throttle bodies as blow by could be making oil get in them and causing throttle to behave erratically.
Naturally the underlying cause of blue smoke would have to be rectified to prevent it happening in the first place.