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Old 12-22-2008, 07:12 PM   #1
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hey moto heads how hard is it to change thermostat and cooling flush on my 2001 honda f4i... with this weather we are having i just thought it would be a good idea since i havent done it yet...
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Old 12-22-2008, 07:39 PM   #2
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if it aint broke, dont fix it.

that's my opinion.

Cold weather will keep an engine colder then normal. Usually hot weather and sticking thermostats is where the problem is. Yes, it the thermostat is stuck open it will take a long time to warm up and would run at a really low temp when the weather is cold, hindering the performance.

I just hit 28k on mine beast and she's not getting any extra attention for the cold weather unless there's a problem.

Your owner's manual will have information in the back for when your coolant flush should be scheduled by mileage and time.
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Old 12-22-2008, 11:07 PM   #3
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+ 1 ( it really doesn't get cold here anyway)
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Old 12-23-2008, 11:15 AM   #4
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Changing fluid is easy, and a good idea too. Changing the thermostat isn't necessary unless you have a problem with it.
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Old 12-28-2008, 08:08 PM   #5
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It's not too hard to change. I cant remember If I pulled throttle bodies off of not before I did it on the last F4i. It should be two bolts and hose clamp.
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Old 01-10-2009, 11:20 PM   #6
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I wouldn't change the thermostat unless your having problems, But the fluid is a good idea cause it can turn acidic and will eat aluminum

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