Cooling System - Engine Oil/A/T Fluid Contamination
Retailer Technical Journal 21965New cleaning method developed for
Oil in cooling system
Date 02-08-2010
Reference: VIDA
Note!
If using a printed copy of this Retailer Technical Journal, first check for the latest online version.
NOTE! THIS DOCUMENT SUPERSEDES THE PREVIOUS RETAILER TECHNICAL JOURNAL 21965 DATED 01-19-2010. PLEASE UPDATE YOUR FILES.
AFFECTED VEHICLES:
DESCRIPTION:
If engine oil or automatic transmission fluid is found in the cooling system, there is a new cleaning method using a flush gun.
TOOLS:
MATERIALS:
SERVICE:
The root cause of the oil contamination must be remedied prior to performing this cleaning procedure. Some examples of where to start looking are:
-Defective engine oil cooler
-Defective radiator
-Defective cylinder head gasket
Once the root cause of the oil contamination is remedied, use the following instructions in order to clean the cooling system.
1.
Note! Some variation in the illustrations may occur, but the essential information is always correct.
General
2. Special tool, PN 9814122, has been introduced for flushing the cooling system. The tool uses water and compressed air. After flushing, the thermostat, all rubber radiator hoses and the expansion tank with cover must be replaced.
Note! The thermostat must be removed from the thermostat housing and the thermostat housing reinstalled for flushing to be effective.
3. The hose that is connected to the thermostat housing during flushing must reach outside of the engine compartment.
Tip! Use radiator hoses PN 30776224 and PN 30761633 as tools. These are suitable for the different diameters on the outgoing connector on the thermostat housings. These can be reused for multiple jobs.
Thermostat removal
4. Drain the cooling system.
Remove the thermostat according to VIDA:
INFORMATION
REPAIR
Removal, replacement and installation Engine with mountings and equipment Cooling system Thermostat/temperature sensor coolant, replacement
5. On most engines the thermostat housing with thermostat is only available as a spare part. In these cases, the thermostat must be removed from the thermostat housing The following steps show how to do this.
Removal of the thermostat from the thermostat housing
6. Step 6 applies to vehicles with B6324S or B630412 engines. Step 7 applies to C301S40N50 vehicles with B5254Sx/Tx engines.
7. Remove the thermostat.
Remove the rubber gasket from the thermostat.
Install the rubber gasket in the thermostat housing.
Assemble the thermostat housing. Reinstall the thermostat housing on the engine.
Other engines not shown in steps 6 or 7:
See relevant model and engine in VIDA.
Flushing cooling system
11. Connect the cleaning gun to hose (1). Connect the water hose and compressed air to the cleaning gun.
Connect a long hose (2) to the thermostat housing, which extends outside the engine compartment.
Suggestion: use radiator hose 30776224 and 30761633.
Hot water is recommended. Use skin protection to prevent burns.
Note! When flushing, the first 20 litres (5.25 gallons) must be flushed out into a container because the fluid contains coolant that must not be flushed out into the drainage network. Flushing can then occur over a flush plate with oil separation.
Flush the cooling system for at least 10 minutes if hot water is used. If hot water is not available, extend the time to 20 minutes.
12. After flushing, the thermostat, all rubber radiator hoses and the expansion tank with cover must be replaced.
For thermostat replacement, see VIDA:
INFORMATION
REPAIR
Removal, replacement and installation Engine with mountings and equipment Cooling system Thermostat/temperature sensor coolant, replacement
To replace radiator hoses and expansion tank, see the spare parts catalogue for the relevant model and engine. There is no method to be followed for the replacement of radiator hoses and expansion tank.
WARRANTY CLAIM INFORMATION