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Changing thermostat

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Old Jun 8, 2009 | 10:06 PM
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Default Changing thermostat

I there a way to change the thermostat without draining the coolant? If it can be done, would someone pleasae explain the procedure. I'm trying to stop an overheating issue in steps. Next is pull the radiator.
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Old Jun 9, 2009 | 07:42 AM
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ttt
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Old Jun 9, 2009 | 08:08 AM
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Yes. Be sure the car is cold so the thermostat is closed. Get the new one ready with the gasket on it so you can do a quick switch. Put a oil change basin under the car to catch a few ounces of fluid. Take out the bottom bolt then loosen the top one and get ready to take it out and hold the old stat in. Then quickly switch them. Bolt the new one in and then change over the hose. Will spill a few ounces of fluid but not too much. Can be done for sure.
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Old Jun 9, 2009 | 08:13 AM
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Originally Posted by minitech
Yes. Be sure the car is cold so the thermostat is closed. Get the new one ready with the gasket on it so you can do a quick switch. Put a oil change basin under the car to catch a few ounces of fluid. Take out the bottom bolt then loosen the top one and get ready to take it out and hold the old stat in. Then quickly switch them. Bolt the new one in and then change over the hose. Will spill a few ounces of fluid but not too much. Can be done for sure.
What about making sure the gasket surface is clean?
I would rather spend few bucks and add some coolent rather than take the chance of having to do it over because of a leak
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Old Jun 9, 2009 | 09:21 AM
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I don't believe there is a gasket, just a rubber o ring.
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Old Jun 9, 2009 | 09:29 AM
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Originally Posted by midlifetoy1
I there a way to change the thermostat without draining the coolant? If it can be done, would someone pleasae explain the procedure. I'm trying to stop an overheating issue in steps. Next is pull the radiator.

Why?

Just put a catch pan under it and pull the bottom radiator hose. If you have cooling problems it might be a good idea to change to coolant anyway. Use distilled water and not more then 50% coolant
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Old Jun 9, 2009 | 09:51 AM
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i dont think you will do it without losing around a pint of fluid using the quick swap method. the faster u can swap it out the less fluid you will lose. ive read that some people have had so much practice at this that they hardly lose even a cup of fluid.
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Old Jun 9, 2009 | 10:11 AM
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Originally Posted by bumble-z
I don't believe there is a gasket, just a rubber o ring.
just changed one a few months ago the thermostat comes with a new housing.Easy swap,
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Old Jun 9, 2009 | 10:47 AM
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Are you sure the thermostat is the problem? What are the symptoms? Have you looked under the car and cleaned out all the debris that collects on the radiator of these cars? When was the last time the coolant was changed?

Unless the thermostat is sticking shut (either all the time or periodically) its probably not the cause of your overheating. The way the radiators are placed on these cars causes a lot of junk to get drawn up and lodged up in the radiator. I put a screen on the opening to help stop this on my car. If you have a lot of stuff up there just clean it out that will help. And also when the fluid gets old it doesn't work as well, and neither do the radiators themselves. The older they get the less they flow and this causes them to run hotter.

Find out exactly what is causing the overheating before you start changing parts. Lastly there is an outside chance that the problem could be the water pump, but this isn't likely although it does happen.
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