BMW X5: Crankcase
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 cast iron cylinder liners similar to the previous M54 engine.
The reason for using the all aluminum configuration is to be more compatible with the increased torque output and cylinder pressure in the N54.
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Fig. 8: Identifying Aluminum Alloy Crankcase
The N54 engine continues to use the "two-piece" crankcase featuring the "bedplate" design.
The N52KP and N51 engines continue to use the composite magnesium/aluminum alloy engine from the existing N52.
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Fig. 9: Identifying "Two-Piece" Crankcase
NOTE: The N54 engine has a different bolt pattern on the transmission mounting (bellhousing) area.
Therefore, a new special tool is needed to mount the engine to an engine stand.
The new tool has slots which will accommodate all NG6 engines.
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Fig. 10: Identifying Bolt Pattern On Transmission Mounting
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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, fo
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
SEE MORE:
Piezo Fuel Injectors
It is the outward-opening piezo-injector that renders possible spray-directed
direct injection and thus the overall
innovations of the N54 engine. Due to the fact that only this component ensures
that the injected fuel spray cone
remains stable, even under the prevailing influences of pressure and
Bonding Aluminum Parts
IMPORTANT: Conform with safety precautions!
Overview of topics:
Equipment
Best before date of consumables
Grinding and cleaning
Flame-coating
Primer coat
Gluing coat
Hardening times
Disposing of adhesive
1.0 Equipment
Emery paper
Cleaning agent: Isopropyl, acetone or spirit
Brush, cott
