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Join Date: Dec 2004
Location: Fairfax, VA
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Question Replacing water pump and timing belts

I am about to change the belts and replace the pump on my 1985.5 944 NA. The belts only have 25,000 miles on them but they have not been changed in five years as the PO did not drive the car more than 5,000/year. More importantly I am almost positive the water pump is leaking coolant. I loose coolant mostly when I am driving. I replaced the oil cooler seals and still have a leak. I checked the compression and all was fine. The pump is a rebuilt turbo-style with only 25,000 miles on it. The leak comes from behind the timing belt cover (it is hard to pinpoint because of this) and appears to originate more towards the passenger compartment side of the pump. I guess it could be a waterpump gasket but I am going to replace the pump since I will have to work my way to it anyway. The only other possibilty I can think of that would cause the leak would be the head gasket altough I am sure the leak is only external. What do you guys think?
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1985.5 944 NA
Old 01-23-2005, 10:25 AM
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pressurize the coolant system and see where it blows out of.
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Old 01-23-2005, 12:34 PM
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Mileage and age are very important in belt change intervals. The leak could be coming through the weep hole in the bottom of the waterpump shaft housing. Change out the seals and rollers while you're in there.
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Old 01-23-2005, 12:44 PM
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The seals were changed at the last belt change. Being five years old should they be ok? (If there are no visible leaks when I take off the rear timing cover).
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1985.5 944 NA
Old 01-23-2005, 02:33 PM
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Cut the rear cover in half and you will not have to take any balance shaft or crank pullies off.
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Old 01-23-2005, 06:15 PM
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