BMW X5: Engine Mechanical Overview
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As far as the physical appearance and dimensions, the crankcase on the N54 is
the same as the N52. The main
change is in the materials, the N54 uses an all aluminum alloy crankcase. There
is also ca
Although, the N54 engine has an all aluminum crankcase, many of the bolts are
still aluminum as on the N52.
This is to reduce any potential confusion between steel and aluminum bolts.
Some bolts, fo
As stated before, the cylinder head cover used on all of the new NG6 engines
is made from plastic. However, the design differs between the engines due to
engine equipment.
For example, the N54 engi
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NOTES ON FITTING A NEW PIPE OR A SCREW CONNECTION
IMPORTANT: Do not kink, twist or crush lines.
Do not disassemble screw connection!
Fitting new screw connection:
Insert complete new screw connection consisting of toothed ring (1), banjo
bolt (2) and assembly plug (3) into
air spring/pipe connecti
Special tools required:
64 5 104
64 5 108
Necessary preliminary tasks:
Remove expansion valve.
Replace sealing rings (1) and coat with refrigerant oil.
Fig. 90: Identifying Sealing Rings
Mount special tool 64 5 108 and retainer (1) with screws of expansion valve.
Tightening torque.
Fig. 9