Question about 1999 Volkswagen Passat
Usually, if the head gasket is okay and there is a water leak which cannot be seen, then it is the water pump at fault.
Any faults in the waterpump seal will only become apparent once the engine has warmed up, and by this time you are happily driving along, blissfully unaware that you are losing coolant. You then stop and switch off the engine and the leak stops as the engine cools down, hence, you never find it.
Remove the top section of the timing cover, start the engine and leave it standing at idle. If the waterpump is leaking you will eventually see it dripping into and out of the timing cover.
Posted on Jun 09, 2008
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Posted on Jan 02, 2017
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