Question about 1998 Chevrolet Malibu

1 Answer

1998 malibu cooling problem. over heats, have changed theromstat and radiator. coolant in tank not hot, suspect water pump?

Posted by on

  • 1 more comment 
  • razdude4 Jul 12, 2009

    No flow at radiator with cap off. Heater on no heated air out of vents. Coolant tank is where the pressured cap is attached. Coolant cold in tank when engine overheats.

  • Richard Scordino May 11, 2010

    Even a failed water pump will move coolant. they leak or get noisy but it's nearly impossible for a pump to not pump. I suspect that either you somehow got the thermostat in there backwards or you have a blown head gasket that is pushing so much exhaust into the cooling system that it's blowing the coolant out of there before it even gets a chance to get hot..

  • Mike Butler
    Mike Butler May 11, 2010

    Do you not see any flow in rad when cap is off and you let it run to operating temperature, and fan comes on? You should actually see flow just before fan comes on. Did you run engine with cap off, and heater on heat after thermostat replaced?



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Chevrolet Master
  • 3,640 Answers

Thats a big possibility that the water pump is not circulating right.

Posted on Aug 26, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

4 Answers

What is causing antifreeze to come out overflow tank?

Could be a defective radiator cap, or a leaking head gasket.

Oct 28, 2014 | 1999 GMC Suburban

2 Answers

Can a water pump make water to return to the water bottle

If the engine overheats from a thermostat
stuck closed or bad head gasket

Aug 10, 2013 | Cars & Trucks

2 Answers

I top off my 1998 Nissan Altime's engine coolant evreyday. Also, the radiator fan stays on for appromiately 2 minutes after I shut the engine off. Is something wrong with the cooling system or the...

The fan running is normal. you need to find where the coolant is leaking. If there are no visable leaks. then suspect the radiator/reservoir cap.

Aug 14, 2011 | 1998 Nissan Altima

1 Answer

My malibu 03 heats up could the radiator be clogged? i changed the spark plugs plus the water pump, the upper hose and the bottom hose, and the thermostat i dont think there are leaks in the coolant tank,...

You may have air trapped in the system. Air can get sucked into the system if you have a loose hose or a bad seal on the radiator cap or the over fill tanks cap. Try to see if your vehicle has any bleeder valves. Should be at the highest point in the cooling system where the air gets trapped.

Mar 11, 2011 | 2003 Chevrolet Malibu

1 Answer

I change the water pump, thermostat, and radiator but its still over heating

I assume that there are no leaks anywhere and the radiator cap is in good condition. A bad radiator cap wil be indicated by the coolant being heard to boil just after the engine is stopped because of the retained heat in the engine when there is no coolant circulation. Ensure all the hoses and clamps where they connect to the various pipes in the engine bay and fix/replace any that are suspect. The heater hoses and those pesky little bypass hoses in the cooling system tend to go hard and split if they are over 10 years old, allowing coolant loss. Those spring type hose clamps tend to be less effective in clamping as the hoses become hard. Worm drive ones are the best to use.

If there are no leaks and water pump and thermostat are working correctly, but undetected loss of coolant once the engine heats up, then it could indicate a problem with the head gasket (Usually caused by allowing engine to become excessively overheated when cooling system has run dry and warping the head) allowing very hot high pressure combustion gases into the engine water jacket, which super heats the coolant in the engine block, which then boils off, and is released via the cap. If the head gasket leak is bad enough it will allow coolant into the combustion chambers which will produce white steamy smoke in the exhaust and allow coolant to get into the sump while the engine is stopped. This is indicated by a white oil and water emulsion on the dipstick.

Oct 27, 2010 | 1999 Chevrolet Malibu

2 Answers

The coolant is getting hot causing the engine to overheat.

This could have several causes. Is the coolant tank full? Is the coolant relatively fresh and a 50/50 mix of water and antifreeze?
Does the heat gauge jump up to hot and then fall back rapidly at some point or just rise and keep climbing? If so, it is the thermostat. Is there a leak evident under the car? If so, it could be a bad water pump. The water pump has a small weep hole and if there is water at that point the pump needs to be replaced. If none of this is the cause, then it could be a plugged radiator or a faulty cap located on the radiator or the coolant overflow tank.

Sep 19, 2010 | 1998 Cadillac DeVille

2 Answers

1997 polo overheats even after removing thermostat

On a water cooled engine... the impeller on the water pump is no longer working correctly. It has probably come loose from the input shaft and is no longer pumping water. You can prove this on a warm engine by filling the radiator to the top and then accelerating / decelerating the engine... if you don't get a change in the water level the water pump is shot.


Feb 21, 2010 | 2001 Volkswagen Golf

3 Answers

1998 nissna maxima , with radiator replacement car continues to overheat, with low to no heat

First, make sure engine is warmed up, then feel the top of the radiator hose, is it hot ?, if not then you may have a bad thermostat, replace with a 195 dgree, or you could have a bad head gasket.
Let me know what you find.

Feb 06, 2010 | 1998 Nissan Maxima

1 Answer

I have a 2001 chevy Malibu. Have problems with

Due to the complexity of the newer cars on the raod today!! what you are experiencing is Normal!!! since the coolant systems on the newer cars run at such a higher pressure and a high Rpm the reserve tank which has it's on drain hose for excessive overflow from the radiator allows the extra high pressure release from the radiator to back flow to the reserve tank and then out the reserve tank overflow hose on to the raod

Jan 17, 2010 | 2000 Chevrolet Malibu

2 Answers

I have a 2002 Malibu that has been overgeating especially when the car is idelling at a stop light or driving in city traffic. The problem is worse on hot days and the more that I drive the car.

The obvious answer would be do you have coolant in the spare tank and in the radiator. The not so obvious answer could be a bad thermostat or a poorly functioning water pump. More often than not you will find it is one of the first two.

Jun 05, 2009 | 1998 Chevrolet Malibu

Not finding what you are looking for?
1998 Chevrolet Malibu Logo

Related Topics:

235 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

83850 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22413 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8841 Answers

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

Answer questions

Manuals & User Guides