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Coolant Leaking Behind Waterpump 95 mustang v6 leaking coolant behind the new water pump. worse when turned on. does not appear to be the pump or any hoses. Solution: If the leak is behind the water pump , then either the new water pump gasket is leaking or the timing cover from the timing chain that the water pump bolts to is leaking and the gasket between the timing cover and the engine block. A couple of the water pump bolts are actually studs that go through the timing cover to the engine block. When the nuts are loosened, the timing cover also loosens. If the gasket for the timing cover is close to failing, it will start to leak. The reason it doesn't leak much with the engine off it because the water pump is not running and no real pressure is on the system. When the engine is running, the cooling system builds up pressure, usually 16 psi and it will push through a weak gasket. I think it is just in need of a new gasket at 151000 miles. The bolts will ...

Water Pump Leak Repair I have a problem with a water pump leak. I have replaced the original with a new pump, but I still have a leak I suspect around the gasket between the waterpump and the engine block. Any suggestions? I was very careful to clean the surfaces and evenly tighten the six bolts in a rotation first finger tight, then to 11 ft-lb, and finally to 22 ft-lb. Is 22 ft-lb the right final torque or do I need to re-torque after the engine has been through a couple of temperature cycles? Solution: I would check the intake gasket for leaking and running down,looking like its the waterpump, as far as I can tell you are doing everything right ,if need be I would put a pressure tester on the cooling system and pump it to 20 lbs and looking very closely at the intake. all I can suggest is to put a little sealant on the bolts,11ft lbs the first pass and 22 ft lbs final pass is the correct specs.no I wouldnt torque it to 28 ft lbs as you are asking ,.let me ask this...