Question about 2000 Chevrolet Silverado

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1999 V8 Silverado. Is the thermostat on the upper hose, or the lower radiator hose? Thanks

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Upper hose

Posted on Oct 04, 2010


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1999 grand prix gt overheating. Changed thermostat, water pump, upper radiator hose. Please help!

does the upper and lower hoses seem to be the same temp when car begins to overheat? ore the radiator cooling fans coming on before the car overheats? did you pressure test the cooling system and radiator cap? also may want to remove the lower hose and flush the radiator. is the check engine light on and does it run bad?

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What is the black hose on top of engine. Under the header covers?

Upper Radiator Hose and Thermostat
  • A large part of a radiator's function is made possible by the upper and lower radiator hoses. The upper radiator hose controls the flow of engine coolant from the radiator into the car engine. In a cold engine, engine coolant is stored inside the radiator. The engine coolant is held inside the radiator until the engine becomes hot enough to warrant engine coolant circulation. When an engine reaches operating temperature, the thermostat valve, which is located at the far end of the upper radiator hose, opens up and allows engine coolant to flow from the radiator into the engine.

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    Just bought a 1999 aurora with 4.0 liter v8, drove it 2 miles and was smoking from engine compartment smelled like antifreeze

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    Oct 13, 2010 | 1998 Oldsmobile Aurora

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    Engine was overheating need to know if a tube is supposed to go from the radiator to the engine coolant

    you should have one upper radiator hose, one lower radiator hose, a small diameter hose that runs over the top of your radiator starting from the radiator cap going left across the top and then to your coolant reservoir and another from your thermostat housing to the firewall for the heater core the upper radiator hose should also go to your thermostat housing. the lower radiator hose goes to your water pump This hose routing is only for a 4 liter straight 6 I'm not sure about the V8 or the 2.5 liter motors

    Sep 24, 2010 | 1995 Jeep Grand Cherokee

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    I cant find the themostat in my 99 chrysler 300m

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    V6: Follow LOWER radiator hose from radiator to thermostat housing.

    V8: Follow TOP radiator hose from radiator to thermostat housing.

    Please let me know how I may assist further.

    May 19, 2010 | 1999 Chrysler 300M

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    How to change the thermostat on a 99 4.8L silverado

    Follow your upper radiator hose from your radiator to where it goes to the top of your motor. It should be located right under the housing where the hose connects. Should be two bolts I believe on the housing.

    Aug 09, 2009 | 1999 Chevrolet Silverado 1500

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    Heating problem

    If you changed the thermostat yourself and have noted that the lower radiator hose is cooler than the upper radiator hose, you may have installed the thermostat incorrectly or have purchased a faulty thermostat. A lower radiator hose that does not get hot (or as hot as the upper radiator hose) is a direct indication of a faulty thermostat. Please vote for this solution if you found this to be helpful. Thanks,

    Jun 01, 2009 | 2003 Jeep Liberty

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    I also need to find my thermostat on my 2000 silverado p/u.

    The thermostat on V6 engines is under the thermostat housing at the engine side of the top radiator hose. The thermostat on V8 models is found by tracing the bottom radiator hose back to the thermostat housing on the engine. The housing, thermostat, and O-ring on the V8 models is built as an assembly and will have to be replaced as such.

    Feb 18, 2009 | 2000 Chevrolet Silverado

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    1999 chevy silverado can't find the thermostat

    Follow the UPPER Radiator Hose to the Motor. The Belt will Attach to a Bell Housing, Remove the Hose and Bell housing. The Thermostat is Underneath the Bell Housing. Please Rate My Response! Thanks!

    Feb 06, 2009 | 1999 Chevrolet Silverado 1500

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    A8 4.2 v8 engine overheating v reg 1999 no oil loss check system ok temp falls to normal if heater on full maybe engine fan failure ? coolant level ok thanks craig

    run it and let it get hot (not to the point of overheating just let it warm up to normal or slightly above normal).  put your hand near the upper radiator hose, if you feel not heat, touch it, be careful as it may be hot.  if it is not hot at all but the engine is warmed up it is the thermostat, the thermostat is located where the upper radiator hose connects to the motor, usually a 2bolt metal fitting, if this is the case just replace the thermostat.

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