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Doug
Doug, Australia Car Mechanic
Category: Australia Car
Satisfied Customers: 8594
Experience:  ASE Certified Factory trained technician
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Just removed and reassembled valley or inlet manifold to

Customer Question

Just removed and reassembled valley or inlet manifold to find gaskets in poor condition, replaced all three. "o" ring and tube appear new. didn't look any further as I thought gaskets were problem. Coolant leak at rear of engine, running down bell housing. '95 3l. v6 pajero
Submitted: 1 year ago.
Category: Australia Car
Expert:  Doug replied 1 year ago.

Hi,

It is most common to have a leak from one of the actual pipes back there, either connecting the head or the ones from there to the water pump/water neck area.
If you are certain the hoses are all intact (including ones off the engine but in the vicinity, like heater hoses) the best course of action would be to buy/rent a cooling system pressure tester. These can be had at most auto parts stores for rental or reasonable purchase price. They attach to the radiator and allow you to pump the system up by hand to reach operating pressure (or beyond) and will cause the leak to become a high pressure stream making locating the leak much easier. Then you can just follow the stream to the leak point, be it a pipe, hose, head gasket etc.