how often should thermostat be replaced - VTXOA
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post #1 of 25 (permalink) Old 01-19-2011, 06:45 PM Thread Starter
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how often should thermostat be replaced

how often should the thermostat be replaced on the vtx1800. im changing my antifreeze on my 2003 and thought i would change it as well as far as i know it has never been replaced.
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post #2 of 25 (permalink) Old 01-19-2011, 07:08 PM
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I've be driving since 1967 and have owned too many cars and motorcycles to count. Two or three years ago I calculated that I have driven close 1.25 million miles over my life time. Most of that in high mileage old vehicles. My Suburban, that I bought new in 1994, has about 265,000 and accounts for about 20% of my 1.25 million miles and still has the original thermostat.

In all those vehicles and all those miles I have had to replace 1 thermostat and that was in a 1964, drop top, 4 on the floor, alumimum block V-6 Buick Special with 120,000 miles on that I bought for $300 and drove the snot out of for 4 years and put on about 75,000. Even then I am not sure the thermostat needed replacing but the guy at the autoparts store told me I should since I was replacing the water pump so I did .

So guess the anwser is change the thermostat once every 1.25 million miles or every 44 years or if it breaks. But I don't see it as a preventative maintenance issue.

According to the official Honda Service Manual, under normal conditions your coolant should be changed every 2 years. More often if you live in either the Death Valley or International Falls, MN. The same recomendation is made for brake and clutch fluid. I do mine about every other year and it takes me about two hours. The biggest pain is pumping out the brake fluid and bleeding in the correct order.



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post #3 of 25 (permalink) Old 01-19-2011, 08:02 PM
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Quote:
Originally Posted by VTXCRZR View Post
I've be driving since 1967 and have owned too many cars and motorcycles to count. Two or three years ago I calculated that I have driven close 1.25 million miles over my life time. Most of that in high mileage old vehicles. My Suburban, that I bought new in 1994, has about 265,000 and accounts for about 20% of my 1.25 million miles.

In all those vehicles and all those miles I have had to replace 1 thermostat and that was in a 1964, drop top, 4 on the floor, alumimum block V-6 Buick Special with 120,000 miles on that I bought for $300 and drove the snot out of for 4 years and put on about 75,000. Even then I am not sure the thermostat needed replacing but the guy at the autoparts store told me I should since I was replacing the water pump so I did .

So guess the anwser is change the thermostat once every 1.25 million miles or every 44 years or if it breaks. But I don't see it as a preventative maintenance issue.

According to the official Honda Service Manual, under normal conditions your coolant should be changed every 2 years. More often if you live in either the Death Valley or International Falls, MN. The same recomendation is made for brake and clutch fluid. I do mine about every other year and it takes me about two hours. The biggest pain is pumping out the brake fluid and bleeding in the correct order.
Only 1 thermostat in all those miles and all those vehicles ?
WOW.... that's so unlike reality
I have owned vehicles and been driving since 1975.
My experience has been that thermostasts give out over time not mileage.
In general they start to give out after about 4-5 years service or around the same time the service life of the first or any battery goes south.
I change the coolant when I change the thermostat.

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post #4 of 25 (permalink) Old 01-19-2011, 10:03 PM
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It should be replaced when/if it stops working.

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post #5 of 25 (permalink) Old 01-19-2011, 10:20 PM
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It should be replaced when/if it stops working.

That's my vote...is there anything in the manual saying to replace? Don't think so...

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post #6 of 25 (permalink) Old 01-19-2011, 11:17 PM
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Ok I have had a drivers license for 33 years and I have only changed one thermostat in one vehicle in all those years. My 03 VTX 1800 has 38,000 miles on it and I am not planning to change the thermostat unless it fails? Why would you? I keep up on my maintenance changed coolant and oil and brake fluid final drive oil etc., but why would i change parts that aren't worn out or in need of changing?

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post #7 of 25 (permalink) Old 01-20-2011, 12:22 AM
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post #8 of 25 (permalink) Old 01-20-2011, 07:56 AM
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Maybe alot are broken and we do not know what are the signs if it stuck in a open position?

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post #9 of 25 (permalink) Old 01-20-2011, 08:12 AM
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Maybe alot are broken and we do not know what are the signs if it stuck in a open position?
Takes a long time to warm up.
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post #10 of 25 (permalink) Old 01-20-2011, 08:19 AM
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Varies.

Ive replaced the Thermostat in a 1972 Big Block Olds after 36 years and 180k miles.

Ive replaced the thermostat in my POS Chevy Tahoe Z71 after 4 years and 60k miles.


Depends on the thermostat itself.

You can get good ones. You can buy brand new ones that dont work.

Easiest to test them with a pot of boiling water on the stove. Dip it in boiling water for about 30 seconds... pull it out, and see if its open.

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