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The coolant in my radiator is not circulating can this cause the heat to not work in my 96 chevy it's a 5.7 votec

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The coolant circulation in the radiator cannot be seen when the engine is cold, coolant seems to be still. It starts circulating when the coolant temperature exceeds around 93 degrees Celsius.
CAUTION: NEVER OPEN THE RADIATOR CAP WHEN THE ENGINE IS HOT. ITS TEMPERATURE IS MORE THAN 93 DEGREES CELSIUS AND THE PRESSURE IS 0.9 BAR TO 1.1 BAR. HOT AND PRESSURIZED COOLANT CAN SEVERELY BURN THE FACE, EYES, CHEST, NECK, FINGERS AND HANDS.
It is better to visit the nearest workshop to get the coolant system be properly checked by the qualified personnels.

Posted on Nov 19, 2014

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  • Cars & Trucks Master
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Your thermostat is stuck partly or fully closed,yes,it can cause it to run hot and no heat.Here's a link on replacing. GET 25 GIFT CARD FOR EVERY 100 SPENT ON ONLINE SHIP TO HOME ORDERS

Posted on Nov 19, 2014

  • Chuck. Anderson Nov 21, 2014

    The heater core & thermostat are new the system was flushed still no heat & the new coolant is starting to turn brown.

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Posted on Jan 02, 2017

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SOURCE: radiator drain plug location 96 chevy 1500

Look on the lower right side(driver's side) of the radiator, It's down there.

Posted on Dec 10, 2008

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4 Answers

My 1991 Chevy Cavalier has just turned 100, 500 miles and has started acting up, went to ck my antifreeze and when i took the radiator cap off ( car is started) the antifreeze in the car was just sitting...


It does not circulate until the engine is warm. At that point the thermostat(cooling valve) opens allowing the coolant , from the radiator ,to circulate into the engine. Before that point only the coolant already in the engine circulates, inside the engine alone. .

Nov 26, 2014 | Cars & Trucks

1 Answer

Car over heating


The most common cause is low coolant level, so check the radiator and overflow tank and fill as needed. If coolant is over 2 years old, it is a good idea to change the coolant and thermostat-start afresh.
Check the radiator cap. If it doesn't hold pressure of about 13-15 psi in the coolant system, the seal is bad and a new radiator cap is called for. The coolant system is a sealed system, so you should never have to add coolant, save for a small loss through evaporation in the overflow tank. If you are losing coolant, there must be a leak that needs found and repaired-a pressure test of the system should show up a leak.
When the engine is warmed up, the thermostat opens and coolant is circulated through the engine (pushed by the water pump on the front of the engine), into the upper radiator hose to the radiator, and down through the radiator where it is cooled, then back to engine and water pump through the lower radiator hose-a continuous circulation. If anything blocks this circulation (like a partially plugged radiator, or leaves, trash or debris on the outside of the radiator preventing good radiator cooling) then you could get engine overheating. You may want to have the coolant circulation checked, and/or have the radiator and engine flushed. Also possible that the water pump may not be promoting good flow-the impellers on the pump may be worn down to stubs-this can happen if regular maintenance is not observed.
Your radiator fans should also be checked that they work when called for.
The worst case would be a blown cylinder head gasket-another common cause of overheating, and the most expensive fix. A compression test could check for this condition- a cylinder or two with low compression indicates head gasket failure. Coolant can get mixed in with the oil, or it may wind up in the cylinders and get burned, putting out white smoke out the exhaust.
Overheating is bad on engines, get it checked right away.

Apr 10, 2014 | 2002 Buick LeSabre

2 Answers

My radiator is not getting coolant


yes but only do that when the car is off and cold

Jun 01, 2017 | 1997 Chevrolet Cavalier

1 Answer

What is mean by thermostate valve


The thermostat is a critical part of your coolant system, the system that circulates water and antifreeze (coolant) through the engine to keep it from over-heating. It is called a valve because it can open and close, depending on how hot the coolant is acting upon it.
The reason to put a thermostat in the coolant system is to allow the engine to reach normal operating temperature quicker (and therefore operate at peak efficiency) than without a thermostat.
When the engine is cold, the coolant is at normal outside temperature, so the thermostat is closed. This means when you start the car, the coolant starts circulating through the engine, but can't flow into the radiator. With a closed thermostat, the coolant just keeps circulating around in the engine until the car warms up, the coolant gets hot, and the heat acts upon the thermostat, causing it to open at a certain temperature (about 185-195 degrees F.), With the thermostat now open, the coolant can now enter the upper radiatior hose and flow down the radiator to cool itself down, before going back into the engine through the lower radiator hose.
So the thermostat is always found on a car in the area where the upper radiator hose connects to the engine. Thermostat closed-water can't circulate through the radiator. Thermostat open- coolant is forced through the hose into the radiator.
I hope this helps you understand the thermostat valve and why all manufacturers include them.

May 27, 2012 | 2011 Fiat Punto Evo

1 Answer

Problem is with temperature control. Even on a very cold day the needle goes up to the top and red light comes on. Had the car to the dealer and he replaced cross-over pipes, thermostat, and and ...


It may be anything. The good news is that if the cylinder head gasket is blownup, then the temperature goes up and never comes down. If you wil not correct the coolant temperature soon, a bloun gasket will complicate the situation. Sounds like a poor circulation from engine to radiator. The cooling process of a car involves:
1 - The heat generator - ENGINE
2 - The cooling device RADIATOR.
Coolant transfer the heat from Engine to the Radiator. From the radiator the sream of air absorb the heat from the radiator and the engine cools down. If the system has no leak, there are twoo factors that affect cooling.
1- Circulation of coolant from Engine to the Radiator.
2 - Circulation of the air through the radiator.
You have to make that you have a good circulation from engine to radiator.
The cause might be:
A bad water, pump, thermostat, or AIR POCKETS in the cooling system.
To check and normalize this you have to:
Rise up the front of engine on oil change ramps.
Top the cooling system with coolant 50/50.
Open the bleedin nipple of cooling system, and add coolant till you see coolant of the blleding nipple.
Start the engine and open the ait blleding screw. If you will se a stream of coolant going up, then you have two good news. No air pockets in the cooling system, and a good water pump. geea start leaking.
Do not run engine for more than 5 minutes. Stop the engine.
The next day with cool endine repeat again the same process.
Make sure that Radiator is free from debris. It is a good idea to clean it up. A water hose can help.

Nov 01, 2010 | 2002 Oldsmobile Intrigue

1 Answer

Replaced the water pump, thermostat, intake seals (top and bottom), had the radiator inspected and flushed, checked the fuses, and took it to the local auto parts store and ran the electrical test which...


You can do a few quick checks: turn your heater on full blast in side the car and start the engine. As the engine heats up, you should feel heat blowing inside the car. If not, coolant is not circulating. No circulation can be caused by an air bubble caught in the radiator after it was flushed. Look inside the radiator to check the coolant level. It should be within an inch of the top. Don't remove the radiator cap when it is hot, you can be burned by steam. Leave the cap off and start the engine. As it heats up you should see movement in the coolant if you rev up the engine. If you find no circulation, the new thermostat may be bad or not opening at the proper temperature. Check the fan to be sure it is coming on as the engine heats up. The fan is electric and is designed to cycle on and off to maintain a steady temperature in the coolant. If it is not operating properly, engine will overheat. Hopefully when the radiator was flushed, the fins were also "blown out" to allow good airflow through the radiator, if not clean the fins with a good blast of a garden hose until all the dirt, dust and bugs are gone. These are simple tests. If the engine has overheated, there is a good chance you may have warped the engine head. This is beyond the repair capabilities of most drivers. Again, simple tests are: pull your oil dipstick. If the oil is frothy and the color of hot chocolate, you have water in the oil. If you can see spots of water clinging to the dipsitck, you have water in the oil. Check your new coolant. If there is oil in the coolant, (frothy brown layer or sheen on top of coolant) you have oil in the coolant. Either condition indicates you have a blown head gasket caused by warping the head by overheating. Blown head gaskets often cause overheating. The fix is to remove the head, have it planed and rebuilt and reinstall with new head gasket. This procedure is complex and expensive. Do it yourself requires a head gasket kit and planing and rebuilding the head. Expect that repair to exceed $600.00. Good luck, hopefully you will find a circulation problem.

Sep 12, 2010 | 2001 Chevrolet Malibu

1 Answer

Car runs hot


Just a few things that can cause an auto to run hot. First check to see if your radiator is hot also,, if it is cold or even mildly warm your coolant is not circulating. Three things can cause this. 1. Thermostat not working. Take old one out (located where top hose out of radiator connects to engine. Usually held by two bolts.) Take it out and put hose back as it was and run engine. If it stays cool replace with new one. They are mostly cheap. 2.Leak in coolant system. Check for leaks, even a small one will cause it to over heat since most systems are pressurized. 3. Lastly, if those don't work it will be your water pump. Needs to be replaced by machanic unless you are very handy. Hope this helps.

Aug 04, 2010 | 1984 Chevrolet Chevy

1 Answer

No heat


Over heat is caused by poor circulation of coolant. This problem can be: 1- The thermostat is not opening ( bad) causing coolant stagnant. 2- Water pump is bad, not circulate coolant. 3- Radiator is clogging up. It is full but water can not going through small clogging up tubes inside to have heat dissipated through the fines.
Since you also have no heat then I think the bad coolant causing the heater core clogged up also, unless the heater valve has a problem not allowing cooling flowing through the bypass hose to the heater core. Correct all 3 things above then you should be OK. Good luck.

Dec 12, 2009 | 2005 Nissan Sentra

2 Answers

Over heating and radiator leaks. overheats after sitting at idle for around ten minutes. its a 5 speed manual transmission 2000 chevy 2 dr cavalier.


if there is a leak then of course you will get overheating from the engine..Be very careful as this can cause permanent damage to the head gasket and it will cost a lot more to fix..First try to stop this leak before you proceed further.

Dec 08, 2009 | 2000 Chevrolet Cavalier

3 Answers

Over heating


water pump, thermostat, or worst case radiator.

Oct 23, 2009 | 2003 Dodge Neon

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