Help Please!!!

[pilotguy1]

My coolant system has been loosing coolant for a while dont know where too. I flushed the system and replaced the T-stat and temp sensor the other day and refilled teh res and within 48 hrs the res was empty... Checked all the hoses, heater core and the radiator itself with no signs of cracks soggy spots, etc... I brought it to two different mechanics who pressure checked the cap and system and said it was holding pressure. The are and have never been signs of coolant in the oil during an oil change and checking the cap and dipstick same with tranny fluid. I looked under the car and there was coolant streaked down the drivers side bottom of the engine. When I opened the hood it was smoking a little bit so im guessing its dripping from above exhaust manifold cause of the burning but i cant see any visible signs of a leak i searched and nothing just dried up coolant on the bottom of the engine to tranny with little beads of coolant building up... Please Help im goign crazy.

 

[dogfriend]

Did they pressure test with the truck running?

I'm thinking that you have a bad water pump and the coolent is escaping the weep hole near the bottom of the pump and flowing down along the engine. The only other possibility I can think of in that area is a leak at the bottom radiator hose.

 

[pilotguy1]

Im not sure if they checked it with the engine on or not I would think so I know the mechanic and he would probably do a thorough job... Ill look at the water pump.

 

[pilotguy1]

The water pump was fine no signs of leaking im thinking maybe the lower intake manifold gasket?

 

[MustangP51]

Have you checked any of the freeze plugs?