Question about 1992 Chevrolet Lumina

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Just flushed system installed new thermostat still no heat and still saying low coolant. no leaks anywhere also starting to miss when driving.

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These can be a pain to bleed the air out of so, turn the heat on full blast, start the car and wait till it gets to operating temp.. Slowly and carefully remove the resevoir cap and fill the resevoir as needed till you get heat out of the vents. If you are able to fill the system and still no heat, flushing the system with a chemical flush is going to be necessary. This stuff can be purchased at any autoparts store for around $10 and just follow the instructions. These do work and work very well. Let me know if you need anything else.

Posted on May 07, 2010

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Posted on Jan 02, 2017

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3 Answers

My 2001 Isuzu trooper 3.0td is flushing water out of the radiator and their is some pressure when I remove the radiator cap the next morning


there are up to 25+ symptoms
of engine overheat.
flushing only works on toilets.
My guess, is it's leaking coolant somewhere.
There should be no pressure next morning.

Cold water does not build pressure.
but if the vacuum breaker in the cap fails
this can cause vacuum pressure, that sounds like
air pressure. but is not. Reverse
Does engine run ok.
have full power,
no pinging
no water leaks.
if it leaks say where exactly.
locations matter,
1: steam blasting in to side, expansion tank running?
2: steam from tail pipe end.?

here are 27 symptoms or causes.

http://jeepdied.com/overheated/overheated%20101.html



same on all water cooled engine,s this.
the top fail is bad thermostat , they live about 7 years, says the top makers.
the next is leaks,
then bad RAD CAP,
cooling fan dead? and more.
running water only not Antifreeze 50%

Nov 11, 2016 | 2001 Isuzu Trooper

1 Answer

Why do I have only Intermittent heat with new thermostat?


Sounds like an air pocket in the coolant system. Those can be a pain, some cars have bleed valves to help. If there is an air pocket, it will seem to be full of coolant, but when the air pocket gets to the heater core it gets stuck there and guess what? No heat, because you won't get any heat unless hot coolant is in the heater core. Old fashioned way is to open the system and keep pouring coolant in at operating temp with heat on full until all the air is pushed out. If it has a bleed valve that can be helpful. Have seen this problem on many vehicles.

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2001 Chevy Venture - My heat is not as hot as usual and blows cool when idle. Coolant level is fine. Temp Gauge isn't working.


Sounds like you need to have the cooling system flushed out then have them put a new themostat in it. If that dont fix the prob you might have to put a new heater core in it or radiator.

Jan 23, 2013 | 2001 Chevrolet Venture

3 Answers

My 2006 Pontiac Torrent cooling system was flushed. Then later experienced overheating and loss of heat. Heater hoses found leaking were replaced. Problem recurred. Cap was replaced and pressure is...


Even if there were no hydrocarbons detected I am almost positive you have a bad head gasket.Usually the back head on the number one cylinder.Almost all the ones I have done with this exact problem has been the rear head and the number 1 cylinder.Hair line crack between the cylinder and water jacket.I always replace both head gaskets.Hope this helps.Good luck.

Mar 04, 2011 | 2006 Pontiac Torrent

1 Answer

Heater on my 05 Grand Caravan blows cold air when below 30 degrees - above 30 works fine. Heat gauge shows normal so it shouldn't be thermostat. Checked coolant and it is fine.


just because the gauge seems normal doesnt mean the thermostat is good, its 5 years old,and may be opening to soon, i would start by having the t-stat replaced and while thats being done have the cooling system flushed including a flush off the heatercore. i ve worked on a couple of these vans with heating problems, most were low on coolant due to a slow waterpup leak, the others with half plugged heatercores, due to the lack of coolant flushes. hope this helps.

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4 Answers

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is electric radiator fan coming on? if not the relay or fuse is bad

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1 Answer

Hi i have a 1994 toyota estima which has started to over heat when sitting in traffic. I am not sure were the thermostat is located, as i guess this is the problem.


Thermostat, coolant sensor, fan relay etc. First check the coolant level, check for leaks. Check if the fans are on when the engine is hot, about to over heat. If equipped with two fans they both should be on. If its all good have the system flushed and a new thermostat installed. If you want to change the thermostat yourself follow the big hoses that are attached to the radiator. Look at each where they attach to the engine. It should be apparent where the thermostat is at the end of the hose. After replacing the thermostat if you don't top off the coolant and there is air in the system the car will over-heat with the new thermostat. Some times radiators have air bleed valves on top. If not then jack up the car a little. Jack it up in the side the radiator cap is at so the air can work its way out. To fill it add coolant when the car is cold, off, and jacked up. Leave the cap off and start the car this is so the thermostat opens and the coolant flows. Continue to add coolant until it over-flows close or put the cap on. Put coolant in the over flow reservoir fill it to the low level. If the radiator has the air valve you don't need to jack the car. If you did it right the car should not over heat and the heater should be working.

May 15, 2009 | 1992 Toyota Previa

1 Answer

Heat 2001 dodge durango


a bad heater core will just leak. it could leak alot. do you ever smell antifreeze? check the coolant level. it can get pretty low before it will overheat. the thermostat should be ok but there could be corrosion. when you had the water pump replaced was the cooling system flushed? 2001, its probably due for a flush. what coolant does it take? (green or orange)

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2 Answers

1966 Ford Mustang overheating


try to run the water pump without hoses, and add water in the 'in' side, if is powers out the other side, then it's fine. how is your water/coolant mix?

Dec 01, 2008 | 1966 Ford Mustang

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