Thread: Weird Loss of coolant.

Originally Posted by lanceman

2001 Pontiac Grand Prix Gt... Losing coolant, however no coolant in oil or under vehicle. Runs fine with no problems.There is some dripping of liquid/water at both tailpipes while running. Could it be losing coolant through the exhaust? If so what could be the cause? I was thinking intake manifold gaskets but wanted to see if anyone had any other ideas or experiences.

I will surely bet that your upper intake is warped and the coolant o-rings are filling your lim with coolant. Have repaired many of these and if it is not taken care of immediately you won't be driving anywhere.

I'm gonna go with something close to the other guys...

I'd say your LIM is currently filling with about 1/2 gallon of coolant. It's doing this through a crack in the UIM where the EGR tube goes up through it. Heat cycles and time tend to crack the UIM right where the EGR tube pokes through. on the other side of that plastic is a coolant port.