Question about 1998 Toyota Corolla

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Car will not warm up

How do i change the thermostat

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DO THIS WITH A COLD ENGINE. There are two rubber pipes coming from the radiator to the engine, one on the top and one on the bottom. The top one joins the engine via a domed plate that is bolted to the engine. Undo the rubber pipe (it can be quite tight.) and loosen the bolts slightly so that ther is a little play. Give the plate a light tap with a wooden mallet or something similar to break the seal with the engine. Undo the bolts and remove the plate. You will now be looking at the thermostat. It fits in loosely. Remove it and get one with the same specs. Replacing is the opposite of removal. Replace the gasket too. Remove the radiator cap and top up with glycol. Run it to normal temp and look for leaks.

Posted on Jan 21, 2009

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Temp measure put a lump of cardboard in front of radiator and use heater to cool engine

Posted on Jan 15, 2009

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1 Answer

Bad thermostat? Heater gets warm, but cools down as thermostat fluxuates between 180 and about 230. It goes back and forth when it is @180 heater blows warm air, but when it goes to 230 etc. the air b


Are you sure there are no air pockets in the cooling system ?
You should have heat anytime the engine temp is above 140 degrees regardless what the thermostat is doing.

Nov 13, 2014 | Cars & Trucks

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Heater not warming up


Most likely the thermostat broke. I expect that you have an older Hyundai and never had the anti-freeze changed. When the engine is cold the thermostat is closed which causes the engine to warm up more quickly. A warm engine runs more efficiently (less gas) and more smoothly. When the engine temp reaches a certain temp the thermostat opens and then allows the hot engine coolant to run through the lines to the heater core. The heater blows air over the heater core which produces the warm air that warms up the cabin. Thermostats used to be cheap and easy to change. I would suggest a web search for how to replace the thermostat. Something like 'hyundai accent 2002 replace thermostat".

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Slow warm up


No, they do not make such. You can buy a higher rated thermostat that will stay closed longer and open at a higher temperature, but it is not a good idea to change from manufacturer's recommendation. Check with the dealership first.

It could be stuck open, but keep in mind with cold weather it will take longer to warm up the engine. I would first try a new thermostat specifically for your car, and see if that helps.

Dec 09, 2013 | Cars & Trucks

1 Answer

98 grand cherokee little heat.heater hoses hot top rad warm bottom is cold collant barely luke warm


While it doesn't seem likely, if you've changed, or had the thermostat changed.... I'd say you got a faulty thermostat. I am curious as to what your temperature gauge says the temperature of the engine and coolant is.. If your gauge is showing hot, I can think of two more possibilities... the water pump isn't pumping right... and, if the water pump isn't working right, the problem can be a cracked head or block, which can cause an airlock in the coolant system. Check the coolant or radiator cap.

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Thermostats in cars are often neglected, if not totally forgotten, units. Yet they play an important role in the general performance of cars by restricting water flow until the engine has warmed-up. Thermostats are heat sensitive valves that open and close. On cars they prevent circulation of coolant to the radiator until the engine is warm enough. When the thermostat is closed water only flows through the water pump and water jacket to let the engine warm quickly. When the thermostat opens, water can then pass through the radiator for general cooling.
google_protectAndRun("ads_core.google_render_ad", google_handleError, google_render_ad); Having a car that warms quickly is particularly useful in cold weather when you want to use your car heater as soon as possible. The thermostat is in a small housing positioned where the top radiator hose connects to the engine. The best time to check or change a thermostat is when you are servicing your radiator because you need to drain the cooling system
first. Hence, a thermostat change is a good time to flush and clean your cooling system, check all radiator hoses and the radiator pressure cap. Be sure you have the correct cap on your radiator and it is not rusted. Thermostats are small, inexpensive items. You can test them by heating in water and checking their operating temperature with a thermometer. However it really is quicker and ultimately more reliable to simply fit a new one,
1. thermostat common problems (replace every 50-60k miles)
2. thermostat switch sensor (which turn your cooling fan on and off)
3. check and see if the cooling fans is running when the engine get to its operation temperature. (fan motor can be fault)

Dec 01, 2010 | 1997 Cadillac DeVille

1 Answer

I need to change the thermostat in my Taurus. Where is it located? Is it a difficult change?


if you find top hose follow it to engine -thermostat housing have to bolts most times /1)drain coolant 2)take about bolts pull up housing take out thermostat 3)put thermostat in (note;how thermostat is turned put new one same way) clean housing good 4)put gasket on with little bit of sealant tigthen bolts 5)put hose back on 6)fill up radiator with coolant &let run till warm up [check for leaks while warming up }top radiator off ;;;;;done

Nov 05, 2010 | 1998 Ford Taurus

1 Answer

'04 Chev Silverado 1/2ton Heater only blows warm air when motor is at high RPM. When I stop and its just idling, it blows cool air.


It sounds like your thermostat may be stuck open, with the engine working hard the temperature of the engine comes up thus the warm air, but just at an idle the thermostat is letting the coolant circulate and not holding it their until it reaches a warm enough temp. You are most likely going to need to change the thermostat.

Jan 30, 2010 | 2000 Chevrolet Silverado

2 Answers

Overheating 2002 Sentra after thermostat change


I have 2002 Nissan ser with 120k, and I noticed a different temperature change when I start my car up...it takes a while to get warm. The weather has been cold lately, but my car has quick jolt as I'm driving until the car warms up. What is this issues I'm having...?????

Jun 10, 2009 | 2002 Nissan Sentra

1 Answer

98 328IS OVERHEATING AFTER CHANGING THERMOSTAT


Are you putting the thermostat in correctly? It it will not work backwards.

And to confirm that there isn't a different problem, take the thermostat out all together and see if it overheats.

Engine not fully warming up is not usually caused by the thermostat. Stats usually fail closed, not open.

You will want to check the water temperature sending unit or gauge after verify the water temperature with an external calibrated thermometer. You can attach and insulate the external thermometer to the housing where thermostat is located.


Reply back what you figure out. I will be happy to help you further.

Feb 03, 2009 | 1997 BMW 328

1 Answer

Temperture Gage


First of all, it doesn't sound like your thermostat is working correctly to keep good hot/warm air coming , so I would change that, or have it changed for better heating inside. If you lift the hood & look in front of your radiator, On the engine side, you'll see a fan attached to, or in front of the radiator. It won't come on until the coolant temperature gauge gets up to proper operating temperature. Without getting in to too much detail, have your thermostat changed, and my guess is everything else will start working as it should, and whoever does the work, should know enough to check the fan operation when they do the thermostat.

Jan 28, 2009 | 1991 Mazda Protege

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