BMW X5: Corrosion Protection
NOTE: Following repairs, the corrosion protection work already begins with the correct removal of the PVC undercoating, antinoise compound and seam seals.
1.0 Removing sealing materials:
IMPORTANT:
- Do not burn off PVC material with a gas burner or similar or heat to temperatures above 180ºC. This would generate highly corrosive hydrochloric acid and release harmful fumes.
- The new lining does not form a satisfactory bond with burnt PVC material which means that subsequent sub-surface rust may set in.
Remove PVC material with a rotating steel brush, or heat PVC to maximum 180ºC with a hot air blower and scrape off with a spatula.
2.0 Corrosion protection of sheet-metal parts:
All weld joints sealed off with body sealing compound in original state must be primed and sealed off again thoroughly after repairing. Replace damaged or removed antinoise compounds.
NOTE: Spray gun required for body sealing compound (order no. 81 49 0 300 887).
Concluding cavity protection is the most important part of all corrosion protection measures.
Use the cavity protection spray only for smaller-scale straightening work where the parts in question are easily accessible. Use the HRS spray gun with pressure container for all other repairs. Cavity protection agent is available in different container sizes.
Use the relevant probes with tubes for the different cavity areas.
Required tools are featured on the WORKSHOP EQUIPMENT PLANNING CD (WEP).
IMPORTANT: Incorrectly performed cavity protection can, especially in the case of steel/aluminum joints, give rise to a non-calculable product liability and safety risk.
The best repair is worth nothing if the subsequent cavity protection measures are not conscientiously carried out.
2.1 Cavity protection of steel parts:
New doors and lids must be sealed with cavity protection agent after being painted.
New sheet-metal parts or cavities, weld seams and folds formed by new sheet-metal parts must be sealed with cavity protection agent after being painted.
The cavities affected must be sealed with cavity protection agent after all straightening work.
2.2 Cavity protection of aluminum parts:
New doors, lids and side panels made of aluminum are not sealed with cavity protection agent.
After all straightening work on aluminum components, the cavities affected must be sealed with cavity protection agent after being painted.
After all welding work (E52 only) on aluminum components, the cavities affected must be sealed with cavity protection agent after being painted.
Cavities, seams and folds formed from new sheet-metal parts must be sealed with cavity protection agent after being painted.
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Frame Alignment Control Dimensions, Body
Dimensions in mm.
Measurement tolerances:
< or = 1000 mm +- 1.5 mm
> or = 1000 mm +- 2.5 mm
The control points shown serve to check the body and the straightening
attachment.
The specifie
Gap Dimensions, Body
The dimensions specified in this document are applicable at an object
temperature of 20ºC. The aim of
adjustment is to achieve a uniform join.
Symmetry of the gaps between left and right sides of t
General Cementing Instructions
IMPORTANT: Conform with safety precautions !
The bonding surfaces must be kept free of all types of dirt and
contamination. Avoid leaving fingerprints.
Cleanliness is the golden rule for all bond
SEE MORE:
Ignition Management
Most of the ignition system components have remained the same for all NG6
engines for 2007. There are some
minor changes to the ignition coils that apply to all versions. The coils have
been optimized for more durability.
Spark Plugs
The spark plugs for the N51 and N52KP remain the same as N52. Ho
Overview Of Sensors For Airbag System
Fig. 53: Location Of Airbag System
Airbag control unit (under centre console)
Acceleration sensors, front (left/right)
Sensors, front door (left/right)
Sensors, B-pillar (left/right)
REMOVING AND INSTALLING/REPLACING AIRBAG CONTROL UNIT
IMPORTANT: Read and comply with notes on protection agai
