Question about 1999 Chevrolet S-10 Pickup

2 Answers

Engine running hot

My truck is running hot. I turned on the heater and fan on high as that is normally what you do when the thermostat is stuck. Well the heater would get hot then it would just be air. then it would get hot for a few minutes.

Posted by on

  • bush_fired Aug 29, 2008

    First thing I checked. I've replaced the thermostat and that did not fix the problem.

  • bush_fired Sep 24, 2008

    I had antifreeze in the reserve tank.

    But rolbar1 was close to the problem.

    Bad radiator cap which allowed an air bubble to mive in the system and not let antifreeze flow from the reserve tank in.

    Brought truck up to normal engine heat with heater on, topped off fluids and replaced with a brand shiny new locking safety cap.

    Truck running back to normal.

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

My 2000 S-10 starting developing overheating problems 5 yrs ago. The antifreeze seems to thicken and clog up my radiator. I had to flush out system and replace thermostat several times. I was told i had rust in my engine block which is causing this. It makes me sick that I bought this truck new and starting having problems at 30k miles.

Posted on Sep 24, 2008

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 3 Answers

Sounds like your antifreeze level is low. When it flows you get hot air and when there's an air bubble due to lack of antifreeze all you'll get is air.

Posted on Aug 29, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Temp gauge keeps running hot.


The thermostat for most vehicles is inexpensive - and pretty easy to replace. We can help explain the process for you if you want if you provide the year, make and model of your car.

Apr 08, 2015 | Cars & Trucks

2 Answers

1999 Dodge 1500, After driving 30 miles the heat is barely warm. Heater core hot both inlet and outlet and the bottom of the heater core is hot, top rad hose warm, bottom rad hose cold, Radiator cap u


sound like the impelled in your water pump may have failed. Or your system is air bound. Try to open the rad cap when its cold and let it run and see if air bubbles come to the top

Oct 04, 2014 | Dodge Ram 1500 Cars & Trucks

2 Answers

Mitsubishi l200 2.5 DiD 2007 74000 miles, bubbling in header tank, over heating and pushing water back to the header tank, heater is still blowing hot air!! So dont think its the thermostat, am I more...


There are other things to test before we have the engine spread all over the yard. Cooling fan operation. Yes the thermostat hot air in heater just means hot water. start with a cold engine then start and run at a high idle if heats quickly upper radiator hose hot lower cold good but reverse no flow. remove and test thermostat (not replace) put on stove boil water and watch it open once center piece is moving check with thermometer it should agree with stamp number on thermostat. if good check for slipping fan belt. check for air restrictions on radiator and water flow.

May 04, 2014 | Cars & Trucks

1 Answer

When engine turned on my heater does not work why is that and how can i fix it.


ok Btad
does the fan run at full speed on high, sure it does, i bet.
the heater only works on a hot engine.
180F min. and holding. some go to 200F (on newer cars)
so does it? get fully hot, and NORMAL.
the heater uses ,engine coolant to steal its wasted heat.

if not?
1: bad or missing engine coolant thermostat.
2: RAD fans stuck on, or is just too cold.\
3: no location stated. and we do get posts from the yes, north pool. or up in high Canadian provinces??? or Norway?
up in alaska we keep some engines running full time (no heated garage)
and all have rad blocked 1/2 way with cardboard.
and some we spray the whole engine with foam to keep it warm.
so not stating location (not one ever in 4000 posts) we cant answer you.

what do we do, well, I point the IR PYRO gun that the thermostat
housing, (need photo?) and see 10 less that stat rating.
if 180 i see 170 if 200 i see 190.
see?

this is the www, and we get posts from all over planet earth.

Nov 24, 2013 | 2000 Jeep Grand Cherokee

2 Answers

My 2004 ford freestar has no heat. how do I add antifreeze or check if it is the thermostat


When the engine is cool, take off the radiator cap and add fluid till full. Also add coolant to the overflow tank if needed
To check the thermostat, leave the radiator cap off, turn heater controls to high heat, and start the engine and run it till at operating temperature (this is to remove air from the system.) Coolant level should drop a bit when the thermostat opens, so you may need to add more. Replace rad. cap when engine is warmed up.
The only way the thermostat would cause no heat is if it were stuck open. So feel the upper radiator hose as the engine warms up. It will be cold or cool till engine starts to warm up-should take about 10-15 minutes, and then the thermostat should start opening, and the upper hose will start getting hot. If the engine takes a long time to warm up, like 30 minutes, the thermostat may be stuck open, needing replacement. If all seems good, check the actuator doors (temperature blend door) on the heater case. The doors have to open properly to let air from the blower motor to pass across the heater core, and then out the vents.
Good luck. If the coolant level was low, that was likely the problem.

Nov 16, 2012 | 2004 Ford Freestar

1 Answer

Saab 9000 running hot what temperature should it be


These fans should not be running continually. Make sure thermostat is not stuck. Test temp sensors and fan relay if fans on and engine is not hot. If hot. Check or replace thermostat. should not be more than 160

Jun 04, 2012 | Saab 9000 Cars & Trucks

1 Answer

Poor heat inside car. some heat when fan on low but when fanspeed is increased heat is lost.


Hello,
It sounds like you have an issue with the thermostat, or blockage in your cooling system.
Here's a few things you can do to check both.
How to test the thermostat in most vehicles;
Make sure the heater is off, start the engine and let it run for 6 to 8 minutes, ( this will allow the
engine to reach, " normal operating temperature "), from the inside of the vehicle turn the heater
temperature on high and turn the fan speed on high.
1. Listen very closely for a click sound from the engine, ( most thermostats make a click when
they open )
2. Watch your temperature guage, it should begin to lower as the coolant starts to circulate.
3. Usually within a few minutes the radiator fan will kick.

If the thermostat appears to be working, do the following.
Turn the engine off. While it's still hot, carefully reach back behind the engine, at the firewall, you should see 2 hoses beside each other, ( around 1 inch in diameter ), feel both of these hoses. If they're both hot then the coolant is circulating fine, but if only one of them are hot, that means something is blocking the coolant from running through the heater core.
If you have blockage, the best thing you can do is have the cooling system flushed and refilled.

I hope this helps you.

Feb 16, 2011 | 2002 Dodge Neon

2 Answers

I dont have any heat and i need to know how to replace the hearter core, however the windows aren't fogging up so maybe its the thermostat


the only way you should have to replace a heater core is if it leaks or gets plugged up. When motor is hot feel the two hoses that go to the heater core. one should be fairly hot and the other should be the same but if one is just warm then follow hose and locate a flow valve and check for operation. OPening and closing with control hot /cold knob. Check coolant level in radiator while cold as well as fill reservoir to full when cold. Also remove radiator cap when cold and warm truck and check for flow of coolant. if lower radiator hose is hot hot hot and upper hose is cool then thermostat may not be opening properly, or thermostat is stuck open not building heat. You didnt mention if truck was overheating?? If its not i'd check for the flow valve operation, if it is i'd make sure coolant levels are full and waterpump is working.

Feb 03, 2011 | 1994 Chevrolet Astro

1 Answer

Engine runs hot


Hello,
Most often that is caused by a bad thermostat.

How to test the thermostat in most vehicles;

Make sure the heater is off, start the engine and let it run for 6 to 8 minutes, ( this will allow the
engine to reach, " normal operating temperature "), from the inside of the vehicle turn the heater
temperature on high and turn the fan speed on high.
1. Listen very closely for a click sound from the engine, ( most thermostats make a click when
they open )
2. Watch your temperature guage, it should begin to lower as the coolant starts to circulate.
3. Usually within a few minutes the radiator fan will kick.

What the thermostat does;

It seperates your coolant into two parts. The first part is in your engine, the second part is in your
radiator and the coolant reservior. When the coolant in the engine reaches the temperature rating
on the thermostat the thermostat opens to allow the two parts of coolant to change places. Now
the cooled coolant in the radiator and reservior flows into the engine while the heated coolant flows
from the engine into the radiator and reservior to be air cooled by the radiator fan.

I hope this helps you.

Feb 02, 2011 | 2001 Volkswagen Beetle

1 Answer

The heater gives a little heat but, not hot air. F-150 4x4 4.6 L engine After warm-up the heater puts out a little warmth but, that is it. It will not get hot like normal during daily operation. I have...


Flushing the system and adding new antifreeze would have been my first suggestion, so, thanks for mentioning that.

We should check a couple of other things.

1. Start the engine, let it run for 6 to 8 minutes, ( with the heater off ), to allow the engine to reach normal operating temperature. Then, turn your heat and fan wide open, then listen to the engine to see if you hear a click, you should be able to hear the thermostat open up to circulate the coolant. If you do not hear a click, you may have a stuck, or partially stuck thermostat.

If the thermostat doesn't open, the hot water/coolant will not flow in to the heater core.

2. In the back of the engine, on the fire wall, locate the inlet and outlet hoses to the heater core. They are both usually about 1 inch in diameter. Carefully feel each hose. Both should be hot. If only one is hot it's because you have blockage somewhere preventing the circulation of coolant to the heater core.

The most common area for blockage is in the heater core itself. Sometimes flushing doesn't clear it out.

I hope this will help you resolve the problem.

Jan 28, 2011 | 1998 Ford F150 Regular Cab

Not finding what you are looking for?
1999 Chevrolet S-10 Pickup Logo

262 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

61249 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...