Question about 2005 Chevrolet Silverado

2005 Z-71 is overheating my gauge pannel has gone out so all i have is my mesage center . yesterday it flased up that my engine coolant hot it would stay on for minutes or somtimes seconds. when it was on the heater would not blow hot air . when i parked it about 5 mins later it had leaked out about one cup of fluid on the ground

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Tracy

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575 Answers

Trying to understand from what you wrote..It sounds like something is not recirculating correctly.I would change out the thermostat first because it's the cheapest thing you can do..It might be getting stuck...not opening normal..When you said you turned on the heater and no hot air.. there's a hose right there at the thermostat that runs to your heater core usually under your glove box..If your not getting hot air then the water is not recirculating through your heater core..it could be a valve that is stuck when selecting heat that's not working also.. Flush your radiator..Open the radiator cap only after car motor has cooled down..Drain the radiator...There's a small turn valve nut at the bottom of it..Watch what comes out..is the water rusty color especially as it slows down from draining...They make radiator flush.. Also you can buy a thermostat that opens sooner...Like if yours is 180...you can buy one that opens at 160..A lot of cars are missing the black spoilers under the car that help push air up to keep motor cool..Make sure your water pump is good..Cat converter is not clogged in front of muffler...It will make you car run hot if it's getting clogged...Also Find out where your losing coolant...I've seen on holes in the heater core that leek from where your AC condensed water drips out..It will fool you and loose about a cup of water.. Smell the water your loosing also....if it's dripping from where the AC water is and you smell coolant...You have a bad heating core

Posted on Oct 05, 2017

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Posted on Jan 02, 2017

Dennis Mulford

1055 Answers

SOURCE: car is overheating and not blowing hot air.

if your not losing coolant its either a blockage or bad waterpump and more than likely its the water pump

Posted on Feb 24, 2009

Anonymous

5 Answers

SOURCE: Chevy Venture Overheating

Almost sounds like the same symptons as my van. Turns out the guage was not the problem. The van was in fact running hot because the electric radiator fans were not kicking in when the engine was hot. I replaced the relay switches for the fans. There are two of these in the fuse panel under the hood. There has been no problem with overheating since

Posted on Mar 31, 2009

Kevin Rahme

401 Answers

SOURCE: 2006 Pontiac Torrent heater blowing cold air

hi
check the heater hoses and if both are hot then the mode door is broken
i have replaced 2 in the torrents(not a nice job)

Posted on Jun 21, 2009

6bta

400 Answers

SOURCE: 2001 s-10 heater blows cold air, then hot air,

May want to start with seeing how much coolant you have in the system. Sounds to me like you are low. Make sure to check it while its cold. Removing the rad cap while hot is a bad Idea, may get burn!

Posted on Oct 15, 2009

robbytclarke

7 Answers

SOURCE: 2004 Chevy silverado heater blows hot than cold hot then cold?

Sounds like your thermostat is stuck open

Posted on Apr 16, 2012

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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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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: ----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
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http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
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----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
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Assuming that you already checked for the engine oil and the radiator coolant level, and if they are ok, then open the hood of your car and start your engine, then go to the front of your car and watch out for the fans, they are gonna be off when you start your car, but keep looking at them they should activate when the engine is hot enough. They should activate just before your water temperature gauge (instrument pannel) reach half of the way. If the temperature gauge goes beyond that (overheating) and the fan hasn't activated yet then two things can be wrong your water thermostat (makes the fans activate when your car reaches aproximately 90°C) or your fans could be burned. I hope that helps

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2 Answers

Over heating

When your temperature gauge reaches "H' it may too late to prevent a major breakdown. Knowing the symptoms of an overheated car and how they occur may be the difference between being inconvenienced and incapacitated.
Identification:---Other than a low oil level or low oil pressure light, there is not a more significant part of a car's instrumentation than a rising temperature gauge or a glowing "Hot" light. These lights are really the only confirmation a driver has that his car is really overheating. It is the identification of the symptoms of an overheating car that enable the motorist to avert a badly damaged engine. Overheating is always a traumatic event for a car's engine, which makes the early identification of the symptom an important addition to the informed motorist's tool kit.
Stuck Thermostat:--The car's thermostat is a valve that controls coolant flow from the engine block to the radiator. When the engine is cold the thermostat remains closed so that the coolant can reach operating temperature quicker and also provide heat to the passenger's compartment. The thermostat has a spring on it that moves depending on coolant temperature causing the thermostat to open. Sometimes the thermostat fails to open thus restricting coolant flow to the radiator where it would be cooled down. This condition is often the cause of overheating. The symptoms of this cause would be a rising temperature gauge and possibly the loss of heat inside the car.
Restricted Radiator:---A car's radiator will have thousands of gallons of coolant passing through in its lifetime. Along with the coolant comes particulate matter in the form of corrosion breaking loose from various parts of the car's cooling system. These contaminates collect in the tubes of the radiator reducing its efficiency. Extensive "plugging" in the radiator will cause the car to overheat. The symptom of this condition would be a rising temperature gauge which goes up when you accelerate.
Coolant Loss:--A car's cooling system is a closed loop system. You are not supposed to lose coolant. Sufficient coolant loss will cause the engine to run hot because engine is heating less coolant to higher temperatures. The symptom of overheating induced by coolant loss would be a pool of coolant on the pavement when the leak is external. Steam under the hood as the lost coolant hits hot parts of the engine, or a rising temperature gauge in the case of a undetectable engine related leak. Of course, the gauge would also go up if the leaks were not detected. Deteriorated Water Pump:--Cars use a belt driven pump to push the water and coolant mixture through the cooling system. This part is called the water pump. Rarely the impeller that draws the coolant through the pump will rust away making it impossible to push any through the system. If this occurs the temperature gauge will climb and coolant will boil over in the radiator. Inoperable Fan:----Most cooling fans are electrically driven. Some are driven by fan belts. If a belt breaks or the electric supply to the fan is interrupted overheating may result. Electric fans are tuned on thermostatically when needed. When the car runs at idle for extended periods or the weather is extremely hot, a failed fan will cause overheating otherwise it serves as a standby assist to the rest of the cooling system. In stress conditions an inoperable fan will cause the temperature gauge to rise. This will help. Thanks please keep updated.please please do rate the solution positively .thank you for using fixya

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

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Tracy

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2005 Silverado

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

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