2000 Pontiac Grandam GT, V6 engine. 97,000 miles. My car overheats after about 20minutes of driving in stop and go traffic, 10 minutes highway. 2years ago I put some stop leak in my car for a leaking coolant somewhere. Got the water pump replaced. 2years later thick gluey residue where coolant go. Because of overheating went to tech, changed my water pump, thermostat, did flush, and changed Radiator $600 repair car still over heating, go to another tech, he says intake gaskets cracked which is causing water leakage big recall on this $800 repair. Got this done.
car still overheating take to GM, they dont know what causing problem no cracked head gasket intake manifold okay, Radiator fine etc. Feel may be clog somewhere but want $95 hr just to tell me something I told them already. I noticed when they changed radiator the thick gluey residue stuff was clogged up in.
My heat goes in and out. The coolant comes out of the overflow where the coolant goes in at like threre is a blockage somewhere in the lines. It bubbles up and overflows through the overflow tube. I hear noise in the car as I am driving like water trying to get through somewhere and when low coolant light come on heat blows cold air. Fans work can come on fine but car overheats all the way to the red. I cut off to let engine cool all the way down. Everytime I pull off in stop and go traffic after 15 min of driving I have to pull over and stop because engine over heats.
I feel that thick gluey stuff it is a brown orange color is clogged somewhere in the heater core and water is not passing through and this is why car keep overheating. Car can stay in park and run for hours and will not overheat but when you take out of park and drive 15 minutes it is too hot. I feel heater core or connections to heater core for water is clogged because the heat comes in and out it just sound like a bunch of water is trapped somehwhere. What do you think problem may be? Please Please help and respond asap. Thank you in advance.
Sounds like a flow problem or possibly a blown head gasket. How did they check the head gasket before? If low coolant light is coming on and heater blows cold, then there isnt enough coolant in it for th eheater to work, has to be going somewgere. Have the engine chemical tested again for a blown head gasket
September, 27, 2007 AT 1:09 PM
GM said I dont have a head gasket blown they checked that. I am not sure how they tested it. I did pay them $95 to tell me it is not the Head Gasket and other parts I had replaced already. GM just looked at the car yesterday because they felt it may be a head gasket as well. I am to broke to pay them again to test the head gasket. I also know the guy said he checked the engine pressure as well. You dont feel like it may be the heater core have that thick gkuey residue stuff somewhere and it is clogging up the lines, because basically the container for the coolant is bubblying up and it just all come back out the overflow. Please get back. Thank you in advance.
September, 27, 2007 AT 1:55 PM
When the low coolant light comes on, is the coolant low? Pressure tested with no visible leaks, yet it loses coolant, overheats when driven. The only thing that will make the heater go hot to cold is an air pocket, thus the low coolant light at the same time as the heater not working. Carpet wet on the pass side? = Heater core leaking.
September, 27, 2007 AT 1:59 PM
No I sorry forgot to tell you they did check on the passenger side underneath for a leak and it was dry. Yes when the low coolant light comes on it is low on coolant. I have to refill up container everytime I pull off it is empty all over again, but it is not leaking from any where it bubbles up and come out the over flow to the container.