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no thermostat

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Old Jul 11, 2010, 12:58 PM
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no thermostat

i live in central florida, had my thermostat go bad the other day and atozone gave me the wrong part. so i put everything back together with no thermostat and was just wondering if there is any disadvantage to running a no thermo set up? i can see where i'd be an issue in the winter time up north but being in florida.. plus my car is running extreemly cool makes me feel safe haha
Old Jul 11, 2010, 02:08 PM
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Well I was actually told in school and at work that running without the thermostat will make your car to overheat since the thermostat controls how fast/slow the coolant passes thru the engine. If the coolant passes too fast than the heat dont transfer causing the engine to overheat. So, I am not sure now who is correct.
Old Jul 11, 2010, 02:44 PM
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thats interesting.. so far my car has been running extra cool
Old Jul 11, 2010, 04:03 PM
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Originally Posted by Crankwalked2G
Well I was actually told in school and at work that running without the thermostat will make your car to overheat since the thermostat controls how fast/slow the coolant passes thru the engine. If the coolant passes too fast than the heat dont transfer causing the engine to overheat. So, I am not sure now who is correct.
I believe you are 100% correct. My not have any effect on the car if its not driven for long periods of time. I wouldn't risk it.
Old Jul 11, 2010, 04:07 PM
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I've had to run without a thermo. It will run too cool when moving. Eventually, it will throw a CEL. Contact Russel @ mitsubishiparts.net - he can get you the right one.
Old Jul 11, 2010, 04:16 PM
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Why would you risk your motor for such an inexpensive part?
Old Jul 11, 2010, 04:21 PM
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Originally Posted by SmikeEvo
I've had to run without a thermo. It will run too cool when moving. Eventually, it will throw a CEL. Contact Russel @ mitsubishiparts.net - he can get you the right one.
^

when sitting or in stop and go traffic, the car will run VERY hot; in some cases over heating.
Old Jul 11, 2010, 04:50 PM
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ya dont risk it! its a few dollar part to risk overheating your motor! it will start to cause problems for you its there for a reason and way better to keep it there!
Old Jul 11, 2010, 04:58 PM
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I would be very careful also. My buddies Mini cooper tends to overheat on hard runs and idle when the thermostat was broken.

Especially if you expect to use your a/c, I would be cautious
Old Jul 11, 2010, 05:04 PM
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like said before when you are moving is fine, but when you are stopped the car will see a huge spike in heat due to the thermostat not being able to kick the rad fan on.
Old Jul 11, 2010, 09:30 PM
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just dont drive it till you replace the thermo wat could be a 10 dollar repair if that can turn into a thousand dollar one (BLOWN HEAD GASKEt)
Old Jul 11, 2010, 09:45 PM
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Originally Posted by NativeSS
like said before when you are moving is fine, but when you are stopped the car will see a huge spike in heat due to the thermostat not being able to kick the rad fan on.
The thermostat has nothing to do with the temp sending sensor. The fan will operate as normal.
Old Jul 12, 2010, 11:35 AM
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yea all the thermostat does is block coolant flow so the car can heat up.. if the coolant is constantly flowing, the car will never over heat. has nothing to do with the fan.
Old Jul 12, 2010, 03:52 PM
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Constant flow to the radiator may make it unable to cool the system as it should.
If you want to test it, take it for a ride and get it to operating temp.
Then, let it sit in the driveway running for awhile and monitor the temp.

Fans should work fine.. but not sure if they will keep temp under control.

You'll see someting happen in stop and go driving eventually.
Old Jul 12, 2010, 08:52 PM
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It always a good idea to run a t-stat for proper engine operating temp. The engine will be more efficient either is hot or cold outside. Highly recommend using a factory one or a name band
aftermarket one. If the engine runs too cold, it will develop more sludge faster.


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