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.
Images (Click to make bigger)
Tuesday, August 6th, 2019 AT 10:34 AM
