Question about 1991 Ford Mustang

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91 Mustang GT running Hot

The air has been taken out of the system...has radiator cap to...I heard that the cats could be clogged up too??? I noticed that if im on the highway if I floor it the temp goes dwn a little too then when I lay off it climbs back up??I;m confused!

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What all have you replaced?

Posted on Sep 26, 2008

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Water flowing out of radiator when idling 93 nissan terrano v6 petrol auto trans


If the coolant was hot when you noticed water coming out the radiator, that is normal from the heat expansion of the coolant. That is why there are coolant overflow tanks-also called coolant expansion tanks.
When refilling coolant, always top up the radiator, and fill the overflow tank to at least the cold mark level (about half-way up on the tank). With cap off, run engine till the thermostat opens- upper radiator hose will become hot-then shut off engine, add coolant to radiator as needed, replace cap. This method of filling will help to expel any trapped air in the system. Oh, and remember to set your heater controls on high when filling coolant, so the heater core and lines also circulate and expel air.
Check the seal on the radiator cap that it is still good. The cap seal is important to seal the coolant system, as it is a closed system under about 15 psi of pressure. The reason to pressurize the system is that the pressure will raise the boiling point of the coolant by about 10 degrees- important when you consider how hot the coolant has to be when running. OK, enough tutorial-I don't think you have a problem with the water pump! G'd luck, reeve.

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Overheating in 91 honda accord


Remove the thermostat and run the engine at idle until it starts to overheat. If it does then the radiator may have clogged veins and needs replacing.

Aug 31, 2012 | 1991 Honda Accord

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My 2002 buick century is loosing coolant fast. When car isn't running around 60-70 mph is seems to heat up more than normal and no heat or ac will occur. Should I replace the thermostat? I noticed the fan...


it sounds like one of several problems radiator needs flushed , water pump is bad or going, thermostat is bad, pin hole in one of the hoses, cracked head, hole in radiator, hole in heater core.if core is leaking you will notice water on the floor inside the car on pasenger side. if radiator has hole when you fill radiator with coolant it will leak froom fins sometimes only when hot. thermostat bad your car will read hot and or cold always. if stuck open cold, if stuck closed hot, after about 15 20 mins of running engine will cause radiator to boil over to over flow tank.never open radiator cap when engine is hot :) burn hazard.if pump is bad or going will notice gauge reads hot intermittent or always. will boil in to overflow tank. if head is cracked will notice water comming from side of engine block or in oil when you change oil. if radiator needs to be flushed will notice scale or gunk on radiator cap
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My trooper keeps over heating, I have changed the fan clutch,the radiator, the radiator cap. I have even taken the thermostat out. and it still runs hot. no crack in the block, could the heater core be...


The heater core being clogged would affect whether the interior gets hot air when set to hot temperature.

The heater core is like a very small radiator that wouldn't affect the temperature of the engine very much.

May I ask how hot it gets? Engines can get to 220 deg. F or 230 deg. F and still be considered to be running in a normal temperature range.

Sep 18, 2010 | 1989 Isuzu Trooper

1 Answer

I have a 84 351 windsor that runs way to hot i put


seems to me that you could have an air lock, try loosening the rad cap slightly and run car until fans kicks in, squeeze upper rad hose a few times to push any air out. Careful with hot hoses. see if this helps.

Apr 27, 2010 | 1991 Ford Mustang

2 Answers

I HAVE A 93 TOYOTA CAMRY LE V6, THAT HAS A WATER PROBLEM, THE WATER KEEPS GETTING VERY HOT, ENGINE PUSHES THE WATER OUT TO THE COOLANT RESERVOIR, LEAVING MY RADIATOR DRY. I HAVE REPLACED THE THERMOSTAT AND...


These engines will overheat for many reasons. >>make sure there is no leaks at all, as air will cause the system to overheat while losing coolant at the same time. Depending if the radiator is original or after market, there may be TWO radiator caps (one on the engine and one on the radiator)- the one on the engine usually is faulty because of direct engine heat to the seal.>> On the thermostat housing, there is an O-ring at the end of the feeder pipe, usually leaks especially if the thermostat was replaced and not the O-ring. >>Check also the hydraulic driven radiator fan>>Check power steering fluid for proper levels first. unplug the switch atop the powersteering pump, start engine, rev to 2000 rpm (fan should increase in speed-you should hear it) if not it may be faulty.>> Check system for proper flow- With engine cold, remove the engine side radiator cap and rev the engine(1000rpm) slightly, notice if the coolant is flowing. If not, possible faulty pump, or clogged radiator. Hopefully this helps

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1 Answer

91 Mustang GT running Hot


does the fan come on when supposed to? you could hook your fans to a toggle switch and run them manually from start to finish this may help. also did you bleed the system after replacing these parts and purge all air from cooling system? is the coolant coming out of the resovoir hose?

Sep 22, 2008 | 1991 Ford Mustang

5 Answers

Over heating


have you checked the heater core try bypassing it .

Sep 19, 2008 | 1966 Ford Mustang

1 Answer

Radiator coolant


first question is after you changed your hose and refilled while the car was running with the radiator cap locked but loose with the heater on high and set on hot run the car till the thermostat opens shut the car down once it does anti freeze level will drop and air will rise and (extreme caution taken with drain pan below ) start the car use two people run it shut it down let air escape threw cap start again run a couple of minutes shutdown again let cool down take cap off restart car with cap off watch radiator level will somone lightly increases gas peddle refill level to top reinstall cap completely tight then let idle down some vehicles have a small bleeder mounted in the thermostat houseing or in line with the radiator circulation system

Sep 10, 2008 | 1992 Mercedes-Benz 190

1 Answer

1990 Ford Mustang GT Still Running Hot!


check to see if you can spin the fanwhile the engine is cool it should spin freely,if it doesnt fan clutch,also I would switch the fan back to oringinal just to test if this is the problem,if it is youll have to design a different fan shroud if you want to use you new fan,if everything done above is ok with the engine cool take off the radiator cap and squeeze the bottom hose 4-5 times in burst this will make sure you dont have air in the system,if this is helpfull please vote me a fix ya

Jul 15, 2008 | 1990 Ford Mustang

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