I have replaced the water pump, radiator, thermostat, hoses, and head gasket. In the last two months, the heater blows as cold as ice, and the car runs near hot after 5 miles, any ideas would help. The mechanic I use says the head gasket needs to be replaced again, (did this last year). Hellllp!!!!!
2007-03-09 10:47:56 · 15 answers · asked by Terrence P 1 in Cars & Transportation ➔ Maintenance & Repairs
Several things come to mind with these problems. First there could be an air lock in your cooling system, meaning a bubble of air is trapped and can't bleed off and out of the system. Some of the GM's have bleeders built into the cooling system, sometimes just behind the water pump or on the top of the thermostat housing. Its a small brass fitting with a screwdriver slot in a brass screw. Have to open those and idle the engine until a stream of coolant runs out with no air bubbles showing. This may take several minutes to get accomplished.
As for running hot after five miles, are the cooling fans working, turning on as the engine warms up and then shutting off. If they aren't working your car will definitely overheat in city and stop and go driving.
Your heater core may be partially blocked up... If you can feel the heater hoses, without getting burned, carefully feel each one when your engine is warmed up. If one is hot to the touch and one only lukewarm then its likely your heater core is plugged up. It can also be affected by air trapped inside, like I mentioned above and a low coolant level.
2007-03-09 12:28:02 · answer #1 · answered by lwjksu89 3 · 0⤊ 0⤋
99 Chevy Lumina
2016-11-04 21:53:33 · answer #2 · answered by ? 4 · 0⤊ 0⤋
99 Lumina
2016-12-16 11:09:04 · answer #3 · answered by obyrne 4 · 0⤊ 0⤋
The heater should be pretty hot. Either you are not getting flow through the heater core because of a plug or the heater control valve is not working. You didn't mention if you are losing coolant or not. Is it possible that the thermostat was put in upside down? Good luck.
2007-03-09 11:03:07 · answer #4 · answered by Fordman 7 · 0⤊ 0⤋
try checking the fuses, maybe they need changing. also you can disconnect the battery for about 30 min. this will reset your car's computer to its factory settings, because usually, when you change out as many parts to a vehicle as you did, your computer may not recognize the new parts and they may not function properly. also, check the oil. if there is no milky white or gray residue on the stick, then your head gasket should be fine. the residue means that water somehow got in your oil and caused it to turn milky with tiny bubbles. i hope this helps, but in the future when you put on a new part to any vehicle, always disconnect the battery first.
2007-03-09 11:12:48 · answer #5 · answered by mark f 2 · 0⤊ 0⤋
Are You sure it is running hot or that the sending unit ot gauge is inop? if engine is overheating the heater should be blowing hot air.
Check that first before doing anouther head gasket.
2007-03-09 11:00:31 · answer #6 · answered by randy9089 3 · 0⤊ 0⤋
All answers are a good possibility. Late ignition timing may cause overheating. If it is retarded by 2 or 3 degrees from specs. Vacuum advance if it has one can retard a timing.
check your belt tension too. Also a partially blocked exhaust may cause that too. also a good possibility is your EGR valve, Detonation which can contribute to overheating can be caused by inoperative EGR valve. Check if you also have the fan shroud. You might have forgotten to put it back.
2007-03-09 21:16:02 · answer #7 · answered by knodz_g 2 · 0⤊ 0⤋
I had the same problem which turned out to be radiator fans not turning on so it would over heat in stop and go traffic and be ok on the highway... turned out to be the fuse box next to the battery was corroded which controls the fans wires underneath were bad got that fixed and problem went away
2014-03-09 08:47:50 · answer #8 · answered by Joe 1 · 0⤊ 0⤋
What about the temperature sending unit? Also, your car should have an onboard diagnostic system that will flash the codes on your dash.
Check your owner's manual, and or a Hayne's manual.
If you have checked your oil, and don't find any water or foam in it, I would have doubts about my mechanic.
Perhaps the water pump that was installed was faulty.
Check the daignostics.
2007-03-09 10:58:35 · answer #9 · answered by jmiller 5 · 0⤊ 0⤋
did he bleed the cooling system right if not this could do damage to your head gasket.
2007-03-09 11:20:40 · answer #10 · answered by norman f 3 · 0⤊ 0⤋