1997 cheverlot lumina the vehicle over heats, all ready change the thermostat 3 times and the water pump . i also put a new raditor cap on the raditor, the heater works for a while then it blows cold air, need help
2007-01-28 06:18:02 · 7 answers · asked by kenneth c 1 in Cars & Transportation ➔ Maintenance & Repairs
Grab the bottom radiator hose while it's cold, and squeeze. Can you collapse it? If so, that's the problem. There is supposed to be a spring in the bottom hose to keep it open, they sometimes rust out and the suction collapses the hose, restricting the water flow. Replace it. It only collapses at speed, not at idle, so you won't notice it.
2007-01-28 06:24:37 · answer #1 · answered by oklatom 7 · 1⤊ 0⤋
Cheap coolants have no lubricant, mid-quality coolants (Prestone) contain silicone as a water pump lubricant. Silicone is a solid, so it is suspended in the liquid solution of the coolant as a fine particulate.
The only problem is that it precipitates out of solution and settles inside the radiator and heater core. Over time, this residue builds up and plugs up the radiator and it inhibits the free flow of the coolant.
A radiator shop can "rod out" your core for you if it's a brass & solder radiator. If you have an aluminum core/plastic tank radiator, you're going to have to buy a new one. I've only encountered one shop that was equipped to dis-assemble a plastic tank radiator, but they are now out of business.
Unfortunately, radiator shops don't like messing with heater cores, you may have to buy a new one.
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2007-01-28 06:52:43 · answer #2 · answered by s2scrm 5 · 0⤊ 2⤋
I'll bet you $10 you have low coolant, probably due to a bad intake gasket. Check for moisture around the intake manifold. GM uses really poor quality gaskets and they develop leaks after 70-80,000 miles.
May need a new radiator, too.
Have it checked out by a licensed professional. It's worth the money.
2007-01-28 06:28:03 · answer #3 · answered by Adam's Dad 2 · 0⤊ 1⤋
I own a Lumina, have someone check the sensors. There is two of them that have a high chance of being faulty. When they get warm they stop working.
2007-01-28 06:28:42 · answer #4 · answered by anton t 7 · 0⤊ 0⤋
You need to flush the cooling system.
Your radiator, and cooling system is plugged up.
2007-01-28 06:21:51 · answer #5 · answered by Mr. KnowItAll 7 · 1⤊ 0⤋
you could have a blockage in the engine block somewhere, have your system flushed rite away!
2007-01-28 06:21:00 · answer #6 · answered by boostnutt 3 · 1⤊ 0⤋
I agree with that.flush the system.
2007-01-28 06:22:21 · answer #7 · answered by Anonymous · 1⤊ 0⤋