BMW X5: Bolts
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, for example, are steel such as the cylinder head cover bolts. This is possible, due to the plastic cylinder head cover.
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Fig. 11: Identifying Bolt
The N52KP and N51 engines use the same aluminum bolt configuration as the N52 engine, with little change.
The cylinder head cover bolts are like the N54 - steel, due to the plastic cylinder head cover.
The same rules apply to the handling of aluminum bolts as in the past.
Strict adherence to repair instructions is required to ensure proper connections.
Be sure to follow the proper torque/tightening angle sequence as outlined in the "tightening torques" section of TIS.
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Fig. 12: Identifying Aluminum Bolt
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Cylinder Head Cover
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
Valvetrain
The valvetrain on the N52 introduced in 2006, used 5 mm valve stems on both
the intake and exhaust. To
increase durability, the exhaust valve stems were increased to 6 mm from 6/06
production.
All
Gaskets And Seals
Head Gasket
The head gasket design on the N54 is unique to that engine.
It features a multi-layer steel design. There is no silicone rubber perimeter
"shelf" as on the N52. This is not
needed due to
SEE MORE:
NG6 Engine
2007 NG6 Engine
Model: All with NG6-cylinder from 2007
Production: from 9/2006
NG6 ENGINE
Previously in 2005, BMW introduced the beginning of a new generation of six
cylinder engines with the N52.
Now, for the 2007 model year, BMW has 3 new variations of the NG6 engine family.
The first of the ne
General driving notes
Closing the tailgate
Safety information
Warning
An open tailgate protrudes from the vehicle and
can endanger occupants and other road users
or damage the vehicle in the event of an accident,
braking or evasive maneuvers. In addition,
exhaust fumes may enter the vehicle interior.
There is a risk of
