Question about 1989 Chevrolet K1500

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NO HEAT TRUCK OVERHEATED, CHANGED WATERPUMP, HEATER CORE, RADIATOR STILL NO HEAT ENGINE IS A 2500K SCOTTSDALE

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  • pauline4963 Dec 20, 2008

    Yes, put a brand new thermostat in.

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  • 19 Answers

Did you check the thermostat on top of the intake where the large water hose goes to .

Posted on Dec 20, 2008

  • shawn_neal_6
    shawn_neal_6 Dec 21, 2008

    what size motor do you have and sometimes you can get a bad thermostat I boil them in hot water to make sure they open before I use it .check it to see if it pops open in the water

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WILL A BLOWN HEATER CORE CAUSE A CAR TO OVERHEAT


No a heater core alone will not cause a vehicle to overheat. The heater cores sole purpose is to transfer heat generated by the engine to the blower motor so that you can get heat from your car vents. A person could technically remove the heater core from the vehicle and connect the hoses together to bypass it, and the car will run as if nothing happened, minus the lack of heat in the vents.

If the car is overheating, there are three mai issues that could be happening. 1) The radiator is blocked and not allowing coolant to be cooled off before returning to the engine.
2) The water pump is broken. The engine relies on this pump to move the coolant throughout the engine. It may not leak as long as the gasket is alright but the impeller ( small fans on the inside of the water pump ) could not be turning.
3) Lastly and most commonly is a faulty Thermostat. The thermostat is the valve which opens and closes at certain tempuratures and decides if hot coolant stays in the engine or circulates to the radiator to be cooled off. If the thermostat fails, unless you have a failsafe one, will fail in the closed position keeping the hot coolant in the engine and causing it to overheat.

The thermostat is by far the cheapest of the issues so consider changing that first along with a coolant flush before considering putting a new rad or waterpump. You can usually get a thermostat, 2 jugs of coolant and a flush kit for about 50$ at pretty much any parts store. Becareful however not to drive a overheating vehicle as gasket burning and head warpage can occur, which will require rebuilding th head.

Good Luck

Jul 14, 2012 | 2000 Dodge Neon

1 Answer

I just bought a 1995 jetta and it's running at 260 degrees. Is this too high, and if it is then what would be causing this?


CHECK TO SEE IF BOTH COOLING FANS RUNNING ARE RUNNING WHEN ENGINE RUNNING START OVERHEATING IF COOLING FANS NOT WORKING CHECK COOLING FANS LARGE FUSES IN THE ENGINE COMPARTMENT OR YOU COULD FAULTY COOLING FANS THERMO SWITCH BOTTOM LEFT SIDE OR RADIATOR.IF COOLING FANS IS WORKING WHILE ENGINE RUNNING.RADIATOR CORES AND HEATER CORE COULD BE CLOGGED.COOLANT SYSTEM NEED FLUSHING. THE THERMOSTAT PARTIALLY CLOSED CAUSE ENGINE OVER HEAT.CHECK WATERPUMP WEEP HOLE IF LEAKING WATER PUMP NEED REPLACING.

Jul 21, 2011 | Volkswagen Jetta Cars & Trucks

1 Answer

No heat in 2003 dodge grand caravan. can hear the core making noise at times and also smell antifreeze in the drivers seat occasionally but there is not water leaking in the floor boards and after 2 weeks...


The noise you hear is air bubbles in the core because it has no coolant in it = you do have a leak somewhere [ hose, radiator, waterpump, engine, etc.]. You may also be able to smell the coolant sometimes with a leak under the hood [ the fumes come in through the cowel vents through the heater]. Check the level in radiator when it's cool, if you have a leak the system won't draw coolant from the overflow bottle. A word of caution - these engines don't like to be overheated, they blow gaskets and crack cylinder heads. Should be repaired ASAP.

Mar 10, 2011 | Dodge Grand Caravan Cars & Trucks

3 Answers

Took out the thermostat, replaced the radiator, the water is circulating in the radiator but it is still running hot. what do i do next?


Overheating can seriously damage a car's engine if left unchecked. Although overheating simply means that a car's engine temperature exceeds normal operating temperatures, the causes of overheating are varied. What follows is a brief list of some of the most common causes of engine overheating.

    Faulty Radiator
  1. A car that overheats will often have a faulty radiator. A radiator is responsible for cooling hot engine coolant that picks up heat from inside a car's running engine. A radiator "radiates" the heat from engine coolant out into the outside air. A faulty radiator loses its "radiating" effects and allows engine coolant to become overheated, thus rendering it ineffective at adequately cooling and engine.
  2. Faulty Water Pump
  3. A faulty or malfunctioning water pump prevents adequate engine coolant flow and can cause a car to overheat. A water pump serves to pressurize and propel engine coolant throughout a car's engine and radiator to increase the heat-reducing capabilities of engine coolant. A faulty water pump loses its ability to adequately pump and propel engine coolant, and can cause a car to overheat.
  4. Coolant System Leaks
  5. A leaky engine coolant system reduces the level of circulating engine coolant, which increases engine temperature and leads to engine overheating. Radiators, water pumps, and coolant system hoses and seals--all of these coolant system parts can develop leaks, which can result in low coolant levels and engine overheating.
  6. Faulty Thermostat
  7. A car thermostat regulates the flow of engine coolant. A thermostat is a heat-sensitive valve that opens when a car engine reaches a set operating temperature and closes when a car engine is cold and warming up. If a thermostat gets stuck in the closed position, coolant will be prevented from reaching the engine, which will quickly lead to engine overheating and potential engine damage.
  8. Low Engine Oil Level
  9. Engine oil, in addition to lubricating an engine's internal parts, helps to keep engine operating temperatures reduced by eliminating friction within the engine. If engine oil levels are low, friction and heat build up inside an engine, a condition that causes increased engine operating temperatures and can lead to engine overheating.

Jan 15, 2011 | 1998 Isuzu Rodeo

2 Answers

AMy 2005 g35 is overheating and has no heat,new radiator waterpump and thermostat,what else can it be?


The passageways in the engine may be clogged, and/or the heater core may be clogged as well.
Also, check that the radiator fan is turning on when the engine gets hot or warm enough to trigger the fan.

Good luck on this repair.

Jan 12, 2011 | 2005 Infiniti G35

1 Answer

"78 Chevy Scottsdale 4x4 400 small block. I


You may have a heater valve that is on one of your heater core hoses may be bad.

Dec 13, 2010 | 1978 Chevrolet C1500

1 Answer

Heater not working, car is overheating. I have also changed the thermostat.


Its likely you need a waterpump , it creates flow for ridding the engine of heat as well as heat to the heater core.

Aug 29, 2010 | 1989 Volkswagen Golf

1 Answer

Overheating


you probably have a clogged heater core

Apr 06, 2010 | 1993 BMW 3 Series

2 Answers

Changed thermostat and added coolant but 1997


could be waterpump?
i was going to say rad fan,but if so heater would be hot.
lack of coolant will make heater core to blow cold,if engine heats up with full coolant,usually means poor or no circulation.
water pump?
run engine with full coolant,at operating temp.with rad cap off and look in rad cap hole and see if there is movement of water inside rad.
[rad fan will not come on if water is not circulating through rad water pump?]

Dec 20, 2009 | 1997 Chrysler Cirrus

1 Answer

Over heating


If your thermostat aint seized shut, its your heater core. You need a new one. Your heater core is another element that makes the antifreeze move in a circular motion. If it aint moving in a circular motion, your car is overheating, meaning that it could be your thermostat, heatercore, or waterpump, but I think that its your heater core. If it is your water pump, your check engine light would come on.

Nov 14, 2008 | 1997 BMW 328

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