12
114 Workshop Manual, TSD3450E, Issue 1
2800
Coolant filler cap
To test Operation 12-3
Special requirements
Use the procedure which follows to check the operation of the coolant filler cap.
Warning! On a hot engine release the filler cap carefully as the system will be under pressure. Cooling system
conditioner contains alkali. Avoid contact with skin and eyes.
1 When the engine is cool, loosen the filler cap slowly to relieve any pressure, then remove the filler cap from
the radiator.
2 Carefully inspect the filler cap. Check for damage to the seals and to the sealing surface. Examine the filler
cap, the seal and the surface for seal, ensure that they are free from deposits. Any deposits or other material
that is found on these items must be removed.
3 Check the opening pressure for the filler cap as follows: fit the filler cap to the pressurizing pump, GE50031.
4 Apply pressure and check the gauge for the exact pressure which opens the filler cap.
5 Compare the reading on the gauge with the correct pressure which should open the filler cap, this figure is
given on the filler cap.
6 Renew the filler cap if it is defective.
Special tools
Description Part number
Pressurizing pump GE50031
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