Question about Chevrolet Impala

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Car sometimes over heat! 2 weeks ago I flushed the radiator and replaced with antifreeze made for all makes and modles by prestone. Ran fine for to weeks untill car overheated refilled fith antifreeze and drove 700 miles to Texas ran just fine eveen cooler than normal. Onthe way back from Texas when I pulled into a rest area the car temperture start to go way above normal but the fans were running the only way to keep engine cool was to keep driving.The next day I replaced thermostate car would run about at the 195 mark then would jump up and down about 20 degrees then jump up to the red line and my over heat signal on dash will go off. Pull the car over sit for 3 minutes the start up and temeture will usualy go back to normal. Tis morning I decided to replace water pump ( 3.4 L engine )as I drove to part store the care temperature raced up to 230 with in 1.5 miles but no heat from heater blower in the car just cold air. On the way back from the part store the gage went straight to about 240 then the heat came on in the car and the tempertur droped to 195 - 200. Have not yet put pump in. Sometimes the car will run 30 - 40 miles and the needle will just stay at 195 and just bounce up 20 degrees the come back down other times I cant go 3 mile with out red lining the gage 1

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Fit 1/3 of radiator flush in to the sistem it is good as you pout 1/3 more 5 days after notes radiator blockge high temp make smart leaks sow ef radiator water stay ful and no top up is block radiator ef you put water sum time check for litle leacks even from water pump ,manifold radiator cup or radiator seals.

Posted on Jun 03, 2012

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I`m positive you have a bad head gasket.I just did one for a friend of mine that had the same problem on his Buick Rondevous.Same motor.These are good motors but they have a tendency to blow the head gaskets.It is usually the back one for the #1 cylinder.Hope this helps.Good luck.

Posted on Sep 15, 2010

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2 Answers

Coolant is a rusty milkshake consistency


if you do not see any obvious leaks under the car and you are still adding water to it, you might have a cracked head gasket which is causing coolant to go into cylinders. If this is the case, this can cause more problems.

Jun 28, 2012 | 2001 Volkswagen Passat

2 Answers

Drained radiator added prestone Radiator flush refilled and started overheating, drained radiator replaced thermostat and now I get no heat from heater,Radiator water is hot


disconnect the heat hoses going into fire wall , put hose into one with pressure and flush as it sounds like it could be bloked in the heater core,the other thing that could be the problem be the hot ,cold switch as it restricts the flow to makes the heater hoter or colder , it might need tlc or replacing as it is manaul not elec

May 08, 2012 | 1995 Toyota 4Runner

1 Answer

Coolant level ok no leaks new 195 deg. thermostat still very little heat from heater defective heater core?


I am assuming your vehicle has the pink antifreeze called Dexcool. This is the recommended coolant for all late model GM cars and trucks. This coolant tends to form a pasty sludge in the cooling system which can lead to overheating and/or plugged up heater core. Try flushing the cooling system with a good aftermarket product such as prestone radiator flush. First thing to do is drain all the pink coolant, then add the radiator flush and fill with plain water. Run the engine according to directions on the flush container. Drain the radiator again and refill with plain water. Run the engine for a few minutes and drain again. Keep repeating this until all the pink antifreeze has been eliminated. Fill the system with 2 gallons of green antifreeze. Make sure the antifreeze container says it is compatible with aluminum engine parts. Hope this helps. If it does, then you won't have to replace the heater core.

Dec 16, 2010 | 1999 GMC Sonoma

2 Answers

Need to change the water/antifreeze in the radiator. How do you do that


check the bottom of the radiator for a drain plug. also, most auto parts stores sell drain kits that install a flush/drain valve onto a heater hose.

Nov 06, 2010 | 1996 Ford Taurus

1 Answer

MY 1997 PONTIAC GRAD AM IS OVER HEATING AND I NEED TO NO WHAT THE RIGHT ANTIFREEZE TO PUT IN IT 3.1L V6


The GM recomend using GM Dex-Cool Red Coolant.
The matter of fact is that many consumers has filed out complaints againts GM Dex-Coll Reed Coolant.
http://www.consumeraffairs.com/news04/2006/08/gm_dexcool.html
http://www.consumeraffairs.com/news04/2008/09/dexcool_settle02.html
http://www.consumeraffairs.com/automotive/gm_dexcool.html
We replace it with:
ANY COLOR ANTIFREEZE
ALL MAKES ALL MODELS
of cars and light trucks
add to ANY color antifreeze
PRESTONE.

It's up to you. Ask before, but if you decide to change the type of coolant then:
If your intention is to add coolant only, then you need:
PRESTONE 50/50
PREDILUTED ANTIFREEZE/COOLANT

If your intention is to flush the RADIATOR (Cooling System), then you need:
Mix with
ANY COLOR ANTIFREEZE
ALL MAKES ALL MODELS
of cars and light trucks
add to ANY color antifrezze
PRESTONE
EXTENDED LIFE up to 150000/mile 5 year protection.
On the back you have to read directions:
Step 1 Drain. Step 2 Flush. Step 3 Fill.
Recommended to ad 30% volume distilled water to 70% volume Antifreeze. If you flush the system and rinse with water you must add only 30% water to the antifreeze. There is more water trapped inside the engine compartment, because the thermostat is closed. Make sure to have a coolant density tester. When you finish one of 5 balls must sink, that indicates that you reached 50/50 strength. That means 50% Prestone and 50% Water, which will provide to your car a -34F degree FREEZE-UP Protection , and +265F degree BOILOVER protection. Make sure to open bleeding valve to discharge air pockets from the cooling system. Add coolant.The next day,while engine is cold open the radiator cap, and test the strength of coolant. If it is not quite right, then siphon coolant from the radiator and add antifreeze, or distilled water as necessary.
Let the car to cool down overnight and start engine. The cooling system might be cold. Untwist the coolant bleeding nipple. If there will be a jet or stream of coolant, that means the water pump is working and is O.K. After replace the thermostat. If still your car overheats then it might be a bad cylinder head gasket.

Nov 06, 2010 | 1997 Pontiac Grand Am

1 Answer

I have a 1997 chevy lumina what kind of antifreeze should i use?


The dealer recommend GM Dex Cool Antifreeze.
But there are complaint against this type of coolant.
http://www.stevesnovasite.com/forums/archive/index.php/t-128547.html
In GM cars we replace Dex Cool with Prestone green coolant.
It's up to you. Ask before but if you decide to change the type of coolant then:
If your intention is to add coolant only, then you need:
Mix with
ANY COLOR ANTIFREEZE
ALL MAKES ALL MODELS
of cars and light trucks
add to ANY color antifreeze
PRESTONE
50/50
PREDILUTED ANTIFREEZE/COOLANT
EXTENDED LIFE up to 150000/mile 5 year protection.
DO NOT ADD WATER.

If your intention is to flush the RADIATOR (Cooling System), then you need:
Mix with
ANY COLOR ANTIFREEZE
ALL MAKES ALL MODELS
of cars and light trucks
add to ANY color antifrezze
PRESTONE
EXTENDED LIFE up to 150000/mile 5 year protection.
On the back you have to read directions:
Step 1 Drain. Step 2 Flush. Step 3 Fill.
Recommended to ad 30% to 50% volume, distilled water. If you flush the system and rinse with water you must add only 30% water to the antifreeze. There is more water trapped inside the engine compartment, because the thermostat is closed. Make sure to have a coolant density tester. When you finish one of 5 balls must sink, that indicates that you reached 50/50 strength. That means 50% Prestone and 50% Water, which will provide to your car a -34F degree FREEZE-UP Protection , and +265F degree BOILOVER protection.The next day,with a cooled engine open radiator cap, and test the strength of coolant. If not quite right, then siphon coolant from the radiator and add antifreeze, or distilled water as necessary.
Make sure to disposal the used coolant properly.

Nov 04, 2010 | 1997 Chevrolet Lumina

1 Answer

2004 cheverolet impala 3.4L engine - Started running hot. Had never changed antifreeze, bought a flush and refilled with antifreeze. Ok for several weeks, started running hot again. Replaced the...


Sounds like you have an air;lock in your cooling system.Try placing a bleeder on the return hose to the heater core ........looks like a small tap

Aug 18, 2010 | 2004 Chevrolet Impala

2 Answers

I have a 2000 Chevy Silverado pickup, and the heater will not blow hot air. I replaced the thermostat, and nothing changed. The radiator was flushed and filled in the last two months as well. I have all...


once truck is warm check both heater core hoses to make sure they are both warm if not then check the cold water valve could be stuck shut not allowing coolant to travel in to heater core.

Jan 05, 2010 | 2000 Chevrolet Silverado 1500

1 Answer

Where can I get a wiring diagram for a 2003 saturn vue? After turning the air off, and the knob setting to zero, then turning the car off, I can hear the fan running for some time (like 10 minutes)...


That is the normal if your taking about the radiator ran, as long as the engine is hot, the radiator fan will run till the engine cools down enough for the temperature sensor to turn off the radiator fans. Your Saturn is 2003 and if you have not serviced the cooling system it may be time. The orange antifreeze has a life of 5 years or 150,000 miles and the green antifreeze has a life of 1 year or 30,000 miles. If the antifreeze has not been replaced, it may be a good thing to have the system flushed out with Preston radiator flush and then the antifreeze replaced with a 50/50 mix (water/antifreeze). If your not sure how to mix the antifreeze, you can buy them 50/50 premixed, With then new coolant, your engine can transfer the heat much better and will cool down faster. Note, too much water will boil over and too much antifreeze will gel up causing over heating. Good luck and hope this helps, keep me posted, be glad to answer any questions you may have. 

Jul 16, 2009 | 2003 Saturn VUE

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