SOURCING REFERENCE for cavity foam HS1.
IMPORTANT: The cavity foam may only be use for cavity sealing at the points at which cavity sealing is present as standard!
The following repair represents the replacement of a shaped part for the cavity sealing by the use of cavity foam.
This type of cavity sealing is used at points at which shaped parts cannot be used for repairs.
This is the case when large amounts of heat occur (e.g. due to welding, soldering or tin-plating) in the direct vicinity or at the point of the standard cavity sealing.
It is not possible here to install shaped parts for the cavity sealing because of the fire risk! To replace shaped parts with cavity foam at further locations, adopt the procedure shown here and adapt it to the relevant ratios.
It must be ensured that the cavity sealing is fully completed.
NOTE: Check the accessibility for the spraying pipe of the cavity foam to the affected cavity after removing the defective parts.
Properties of cavity foam HS1:
Information on dangers/hazards:
Wear eye protection, solvent-resistant protective gloves and protective clothing.
Apply in well ventilated rooms only.
WARNING: Application time after mixing process: within 8 minutes!
Processing instructions:
Do not use spray can after the expiry date has passed. After the Use by date the properties of the cavity foam will no longer meet the requirements of the BMW Group.
IMPORTANT: Foam expands many times over as it sets (change in volume).
This enables an optimal dosage (i.e. spraying time) to be specified for filling the cavity on the vehicle with foam.
Sourcing reference: BMW Parts Department.
Hardened polyurethane foam can only be removed mechanically.
Cans that are not entirely empty or are unused and have an expired expiry date are classed as hazardous waste.
Observe country-specific waste disposal regulations.
BMW X3 Service & Repair Manual > Final drive: Removing and installing/replacing rear differential
Special tools required:
33 5 206
33 5 200
33 5 120
33 5 125
33 5 123
33 5 121
33 5 124
33 5 126
33 5 122
33 5 127
WARNING: Danger of injury!
Rear axle differential must be lashed with tensioning strap 33 5 206 to prevent it
from dropping down when pressing the output shaft ...