After A/C recharged when the A/C is turn on smoke blows out of the exhaust

Hello,

What color is the smoke coming out your vehicle's exhaust?

Thanks,
Alex
2CarPros

It is like a grayish and a weird smell I have never smelt. When I left the shop and gave it some gas it poured smoke then turned A/C off and it quit.

Hello again,

The only thing I can think of is that when you turn on your A/C it is putting a bigger load on your engine and it is engine oil blow by that is being burnt in your engine's combustion chambers. The A/C system has nothing to do with the exhaust system. Here is a link for you to go to below:

https://www.2carpros.com/articles/blue-smoke-from-engines-exhaust

Thanks,
Alex
2CarPros

That is what I was thinking or it was over charged. Which would mean my pressure sensor is buggered and not shutting system down?

These two system are not related to only thing I can think of is the when the engine is under load the engine starts burning oil. does the engine use oil normally?

Hello.

It hasn't burnt any oil since I have purchased the vehicle. Tomorrow I was going to take a look at the PCV valves as the vehicle was sitting for awhile.

That car does not have a PCV valve but you could have had a vent tube knocked off when the service was done? Here is a service bulletin that concerns the system:


SI B 11 01 07
Engine

March 2009
Technical Service

This Service Information bulletin supersedes SI B11 01 07 dated February 2009.

[NEW] designates changes to this revision

SUBJECT
N62 and N62TU Crankcase Ventilation System Cold Climate Conditions

MODEL
E60 (5 Series) 545i from start of production up to 9/2005

E60 (5 Series) 550i from 9/2005 up to 10/2006

E63, E64 (6 Series) 645Ci and 645CiC from start of production up to 9/2005

E63, E64 (6 Series) 650Ci and 650CiC from 9/2005 up to 10/2006

E65, E66 (7 Series) 745i and 745Li from start of production up to 3/2005

E65, E66 (7 Series) 750i and 750Li from 3/2005 up to 10/2006

E53 (X5) 4.4i and 4.8iS from 10/2003 up to 9/2006

E70 (X5) 4.8i from 9/2006 up to 10/2006

SITUATION
Certain areas of the US experience extremely cold climate conditions during the winter months. A small number of vehicles in the above-listed Series have experienced problems ranging from leaking oil-filler caps, leaking or broken valve covers, to complete engine failure.

CAUSE
Moisture accumulating in the engine crankcase ventilation valve or hoses can freeze due to low ambient temperatures. When this occurs, depending on the position of the internal valve, it may either cause high crankcase pressures (stuck closed) resulting in valve cover leakage and/or breakage, or cause an oil hydro-lock condition (stuck open), which could result in engine damage.

CORRECTION
Replace the cylinder 1-4 head cover and install updated ventilation hose(s). Refer to one of the following procedures, based on model and production. Refer to Repair Instruction RA 11 12 006, Removing and installing/sealing right cylinder head cover (N62/N62TU).

PROCEDURE A:

E60 (5 Series) 545i from start of production up to 9/2004

E63, E64 (6 Series) 645Ci and 645CiC from start of production up to 9/2004

E65, E66 (7 Series) 745i and 745Li from start of production up to 9/2004

E53 (X5) 4.4i and 4.8iS from 10/2003 up to 9/2004

1.Replace the cylinder 1-4 head cover with P/N 11 12 7 563 474 with the updated crankcase ventilation valve.
2.Remove the crankcase ventilation plastic corrugated hose (1) connecting the two cylinder head covers and intake system. Install the modified insulated hose with the external pressure regulating valve (2), using P/N 11 61 7 563 476. Install the insulated hose (3), using P/N 11 61 7 547 186.

PROCEDURE B
E60 (5 Series) 545i from 9/2004 up to 9/2005

E63, E64 (6 Series) 645Ci and 645CiC from 9/2004 up to 9/2005

E65, E66 (7 Series) 745i and 745Li from 9/2004 up to 3/2005

E53 (X5) 4.4i and 4.8iS from 10/2003 up to 9/2006

2.1. Replace the cylinder 1-4 head cover with P/N 11 12 7 563 474 with the updated crankcase ventilation valve.


2.2.Remove and discard the ventilation hose (1). Install the modified insulated hose with the external pressure regulating valve (2), using P/N 11 61 7 563 476 in the same location.

PROCEDURE C
E60 (5 Series) 550i from 9/2005 up to 10/2006

E63, E64 (6 Series) 650Ci and 650CiC from 9/2005 up to 10/2006

E65, E66 (7 Series) 750i and 750Li from 3/2005 up to 10/2006

E70 (X5) 4.8i from 9/2006 up to 10/2006

1.Replace the cylinder 1-4 head cover with P/N 11 12 7 563 474 with the updated crankcase ventilation valve.

2.Remove the ventilation hose (1). Install the modified insulated hose with the external pressure regulating valve (2), using P/N 11 61 7 563 477 in the same location.

Check out the diagrams (Below). Please let us know what you find.

Will look into that.

Thank you

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