Question about 1998 Isuzu Amigo

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Overheating My truck has just started to overheat and go way past the red line of the H on the temperature gauge. I tried replacing the thermostat but when I refilled the radiator with fluid the check engine light came on and there was a bunch of smoke coming from the exhaust. As soon as I drove it again, the temp. gauge was high again. I have no idea what it could be.

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Did the smoke arrive immediately, or after the engine got to temp? Did you recheck the radiator fluid. From initial sounds, you may have ran too hot for one reason or another (low coolant, leak, bad thermostat, etc.) and now have a bad head gasket, or worse, a cracked head. This is not unrepairable and may be resolved with a GOOD block sealant with a lot of luck. FOLLOW INSTRUCTIONS TO A "T".
In any event, it would appear from your description that coolant is entering the exhaust. You can verify by checking the coolant level again and also carefully placing your hand, or a piece of plastic inches away from the exhaust. Coolant will be obviously detected if this is the issue.
If you are somewhat mechanical, you can remove the top half of the engine to replace gaskets, and remove the heads to be shaved down at a machine shop. they will tell you if the heads must be replaced. I have done this once, so I am no expert, but I survived the experience.

Posted on May 19, 2009

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Posted on Jan 02, 2017

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Changed out water pump and thermostat and vehicle runs high temperature what could be issue?


Reasons the Temperature Gauge Reads High

If the temperature gauge reads high, it could mean your engine is overheating. Another reason your reading might be high is you could be losing coolant. A small leak or evaporation may cause your radiator to slowly lose coolant. A third reason your temperature gauge reads high could be because the thermostat is broken. If this is the case, you may need a coolant temperature switch replacement. The last reason the temperature gauge could read high is because of a water pump, or water pump gasket failure. If the water pump is malfunctioning, it may need to be replaced by a professional.

What to Do If Your Temperature Gauge is High

If your temperature gauge is reading high, it means your car is overheating. This is a very serious matter and you should never drive an overheating car. If your car starts to overheat, shut off the air conditioner and open the windows immediately. If this does not reduce the overheating, turn on the heater as high as it can go. If this still doesn't work, pull over on the side of the road, turn off the engine, open the hood carefully, and wait until the vehicle cools down. Never open the radiator cap while the engine is hot - coolant can spray and burn you. Once the vehicle has cooled, take the car to a mechanic right away so they can diagnose the problem. Cars are especially susceptible to overheating in hot climates, like what's common in cities like Los Angeles, Phoenix, Las Vegas, or Atlanta.
The temperature gauge is an important tool in your vehicle that shows the temperature of your engine's coolant. Contact YourMechanic and have your car inspected for overheating if it reads too high, as this can cause serious problems...

Reasons the Temperature Gauge Reads Cold

On most vehicles, the temperature gauge reads cold until the engine has run for a few minutes. If the temperature gauge still reads cold after the engine has warmed up, the gauge may simply be broken. Another reason the temperature gauge could read cold is if the thermostat in the vehicle stays open. With the thermostat stuck open, the engine can be overcooled, causing a low temperature reading. If this is the case, the thermostat may need to be replaced.

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1 Answer

Why does overheat gauge display as if overheating, but drops down when braking?


have you tried to check overheat gauge?? some temperature sensor? isn't that faulty?? I don't mean thermostat, but sensor...

is it really overheating, or gauge is showing overheating???

long time ago I had car that had same problem.... never overheated, but still signalized high temperature.....that time it was temperature sensor probably not compatible with correct one ....

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1990 dodge dakota 2.5 over heats temp gauge erratic


For car running hot and overheating issues, I suggest to you go through this help links. Click this link below and go through the troubleshooting procedure to take care of the problems: ----

temp gauge goes erratic? http://technoanswers.blogspot.com/2012/01/heater-blows-intermittently-and-temp.html

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Temperature gauge keeps fluctuating up and down close to red? http://technoanswers.blogspot.com/2012/01/temperature-gauge-keeps-fluctuating-up.html

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Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------All types of car overheating problems and troubleshooting?

http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
--------overheating? http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
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Temperature gauge does not move and no heat when heater is ON? http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

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This details will help.Thanks.

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1 Answer

The temperature gauge rises in the red zone and the car shuts down.


that is overheat shutdown in that cars computer. the easy way to fix this type of problem is to start cheap and replace the cars thermostat and put new coolant in it. if the overheating continues your water pump is the next to fix.

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2 Answers

Temperature gauge going to the red when driving


put some water in , find out if you have a leak , ie, leaking water pump or pipe , is it overheating , is the oil got white sludge under the cap , a sign water is getting past the head gaskett , check out these items first

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3 Answers

Overheating


If the cooling fans, water pump, radiator, and thermostat are all working properly and the engine is still overheating, I would take a look at something a little more simple, like a defective radiator cap. Try this inexpensive fix and see if it works. Sure hope this helps and good luck.

Jul 19, 2009 | 1995 Toyota Land Cruiser

2 Answers

Overheating


If you haven't flushed your radiator, i would recommend this asap. i would also inspect the water pump and thermostat as well. replace both components if found to be faulty.

Make sure the cooling fan is operational. it should cycle on and off if the air condition is activate.

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1 Answer

Overheating


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2 Answers

1995 Jeep Cherokee Country 4x4 - Truck continues to overheat a short while after starting. Have replaced radiator, thermostat in line, & flushed system unti it ran clear. Added new antifreeze and...


Try changing your temperature gauge (temperature switch). It's located right next to the thermostat (at least on my 1992 it is)

"The temperature switch supplies engine coolant temperature data to the MCU. Until the engine is sufficiently warmed (above 135°F/57°C), the system remains in the open loop mode of operation (i.e., a fixed air/fuel mixture based upon engine rpm)."

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