Question about 1998 Toyota 4Runner

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4runner still over heating change water pump and t stat

Engine still running hot

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Better check radiator cooling fan clutch if fan turning slow at idle then fan clutch is bad .

Posted on Mar 20, 2014

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Posted on Jan 02, 2017

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SOURCE: RADIATOR FAN

If you've got the hydraulic fan, check to see that the solenoid at the power steering pump is plugged in. My 1993 3.0 had this happpen, and that's what was wrong. You have to pull the front passenger side wheel off to access the pump. Just stick your hand up in there and feel around. You'll find it. One way to check is to let the car idle and turn the a/c on full blast. You should hear the fan start to roar after a few seconds. If it doesn't, then check the solenoid wire. Worked for me!

Posted on Sep 14, 2008

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SOURCE: change the water pump

if its a v6 you need to remove the pump. Its about 7 out of 10 ten being hard 0 being easy

Posted on May 02, 2009

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SOURCE: 88 truck,22re engine runs hot. changed t-stat 3

first thing to try (no cost)is to undo the highest (heater?)hot hose clip and release any trapped air ,do it when hot,but be carefull...wear rubber gloves.sometimes the hose on top of the thermostat is the right one...after that its gonna cost....

Posted on Aug 12, 2010

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3 Answers

Why are there heat issues with engine constantly trying to stay in the 210-220 range?


ECT sensor may be corroded. Do the fan/s come on around 210-220 ?

Dec 04, 2015 | Cars & Trucks

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I noticed overheating, no warm air when heat was turn on. ? is the t-stat stuck close or water pump gone? checked hoses in and out of the heater core from under the hood and they were not hot nor felt like...


Well if the thermostat was stuck closed, the engine and the heater would get hot but the coolant would not flow thru the radiator.
If the cooling system is full of fluid, and the engine is running hot, and the heater hoses are cold, I would say the water pump has failed or you have another kind of restriction.

Jan 04, 2013 | 1995 GMC Jimmy

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Grand am running hot ----2004 se1 3.4l---changed water pump---radiator---thermostat---cooling temp censor


I would check to see if the radiator fan is coming on when the engine starts getting warm.

May 08, 2010 | 2004 Pontiac Grand Am

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On 2000 4runner, i changed the water pumr ,thermastat, and timeingbelt the problem i am having is heat . When i pull both heatercore hoses i do not get any flow of coolant untill i rev the motor ,i tried...


There is an air pocket trapped in the cooling system. I have found that if I splice a flushing tee, found at the auto parts store, into the upper heater hose, and fill the cooling system, it usually bleeds the air out of the system.Is the t-stat installed properly?

Jan 07, 2010 | 1990 Toyota 4Runner

1 Answer

Waterpump not working?


Have you tested the thermostat yet? Are you "sure" it's working? That engine is NOT known for having water pump impellers going bad at all. I would believe a bad t-stat before a bad water pump. In my enperience if it's now flowing water, start there. If you can, take the t-stat out and put it in a pot of boiling water on the stove. Use a meat thermoneter, or even a cany thermometer and check the water temp. the T-stat should open up on it's own, even without water flow between 195 and 210 degrees. If it isn't, there's your problem. Start there, ESPECIALY if you "just put in a new T-stat." I've had FOUR bad t-stats brand new out of the box from 3 different suppliers in 15 days at my shop. I'm testing them before installing them now. the Stick

Dec 10, 2009 | 1991 Toyota 4Runner

1 Answer

I have a 2004 Jeep Grand Cherokee with a V8. I


Water pump would never do that. pump either works or doesn't. You should have no heat 'till the engine is warmed up. Engine heats the water. If it was doing this before you changed the thermostat then the old one may have been bad. However, at this point, Id be looking to see if you have it installed with the spring end towards the engine, if the electric fans are coming on and if the radiator is internally obstructed and not flowing properly. You need to re-fill the system with the heat on full hot and the fill cap off to ensure that air purges from the system. If equipped with air bleeds, use them as well. One trick I use to prevent air binding is to warm up the engine to the point that the temperature is just below where it normally runs at. Turn the engine off and wait about three minutes for the stat to open and then begin filling slowly till it's full.(running) Used to be you could check radiator flow by putting your hand on it in different spots when hot. Cold spots would be where flow is restricted. Today radiators are not easily reached but most good shops use a heat sensing gun to check this. If your radiator fills through a cap on the radiator if you need to dribble coolant in or it backs up, that is a good indication that the radiator is obstructed as well (providing t stat is working.)

Dec 07, 2009 | 2004 Jeep Grand Cherokee

1 Answer

How to diagnose a bad water pump


Not that big a job, to pull the t-stat and test it in hot water in the house.
If you have a candy thermometer and a large pot, suspend the stat in the water via string, heat the water and observe if the stat opens up.
If yes, the at what temp, most are between 170-190 degrees?
If not then you have at least one suspect.
You can also button up the Ford and start it up, does it still over heat without the stat?
Even with the engine cold the pump should still circulate water.
Either way the fastest method is to turn a few wrenches to get a suspect stat out to test.
If you have a cooling issue when was the last time you changed fuild and/or did a superflush of the cooling system?

Aug 06, 2009 | 1993 Ford Ranger SuperCab

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My VW Cabrio is overheating after 1-2 miles. Coolant in recovery tank is boiling by this time and making bubbling noises. Someone changed radiator hoses, flange, some housing. They are saying that radiator...



Run the engine and look at the header tank , is there lots of air bubbles coming back out of the water if is then the head gasket may have split and that is down to either a can of Radweld or a strip down repair

If the radiator is not uniformly hot them I would go for that as your problem

Normal operation is that the engine starts the thermostat is closed , engine block heats up and opens water starts to circulate around the block

So to check that you need to fill the radiator with cold water run it for a few minutes check the bottom hose it should be cold

The stat opens and the bottom hose should get hot as the water from the block is pumped into the radiator for cooling.

The radiator should get hot all over and the cooling fan should kick in when the sensor hits the over limit stop.

If that does not happen then get someone to remove the stat altogether (It is only there to get the engine block warm quickly in cold regions )

In which case the bottom hose should go from cold to warm to hot

Jun 23, 2009 | 1997 Volkswagen Jetta

3 Answers

Water is not circulating in radiator. Engine is running hot.


sounds like the thermostat. the thermostat lets the water flow from the block to the top of the radiator.

Mar 20, 2009 | 1992 Nissan NX

1 Answer

Overheating


Put in a t-stat. No thermostat can act like a bad thermostat, causing over heating, i too have a 94, it was clacking eradically, turns out it was the t-stat opening and closing about 60 times a minute, so i took it out, it got hot, put a new one in, and no more issues.

Jan 16, 2009 | 1995 Toyota 4Runner

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