Removing and installing coolant pump
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Note:
Exchange or repair coolant pump only if it has been found to be leaky.
The design of the coolant pump mechanical cassette seal permits small amounts of coolant to
pass through it. This coolant passing through results in a trace of drained coolant below the drain
bore. The coolant pump need not be exchanged or repaired because of this trace of permeating
coolant.
For this reason before exchanging or repairing a coolant pump ascertain
D whether the cooling circuit shows visible and recurring signs of coolant loss; if yes
D whether the coolant loss is caused by spillage from the expansion tank (e.g. too full) or by other
leakages from hoses, radiator etc.
Coolant pumps must be exchanged only if coolant drips visibly while the engine is in operation or
after the engine has been switched off.
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