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Car started overheating. Reservoir filling up with antifreeze and bubbling. Did a block leak test which showed no combustion gases. Changed radiator cap. Did pressure test on radiator and found water pump was leaking. Replaced water pump. Bled air yesterday and drove car for about 30 minutes.A/c and heat worked well. Later yesterday I drove car about 5 miles, and it was doing fine. On way home I stopped at store. When I tried to crank car to come home car wouldn’t start. Checked battery cables and made sure they were tight. Tried cranking again, this time giving it gas and was able to drive car home, about 1/4 mile. This morning tried starting car and it started right up. Turned heat on, and no heat. Decided to try bleeding air again. Reservoir filled up with coolant and was bubbling again. Please help. Need car and running out of ideas. Someone point me in the right direction. Thanks
Keith Pike, If coolant is going down after bleeding the system properly and the water pump is good now, no evidence of coolant leak, there must be an internal leak to engine,do you notice more white smoke from exhaust or do you see a build up of foam on the oil cap. Have cooling system pressure tested again both when warm and cold to verify no internal leak. The most common failure I had noticed on the 3.4 were the intake manifold gaskets breaking down allowing coolant into engine. The 3.4’s can also be a bear to bleed some times, you may have to repeat the bleed process a few times over a couple days to rid the air in system. Lets not rule out a bad thermostat, collapsing radiator hose or partial plugged radiator also and do use correct coolant to water mix. Good luck. I hope this helped you out, if so let me know by pressing the helpful button. http://repairpal.com/intake-manifold-gas…
