Thermostat


Information and questions on GL1000 Goldwings (1975-1979)
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portugeezer
Posts: 424
Joined: Sun Feb 13, 2011 3:44 pm
Location: Mchenry, Illinois
Motorcycle: 1976 gl1000
1982 Gl500
1984 Honda Magna V30

Thermostat

Postby portugeezer » Thu Mar 20, 2014 10:04 am



I just went to my local bike repair guy to see if he could sell me a new thermostat. He said take it out! I said why? He said they run better without them. I said well mine is stuck open. He said then leave it. This guy is well respected. What do you guys think?



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virgilmobile
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Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
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83 GL1100 standard
84 GL 1200 I

Re: Thermostat

Postby virgilmobile » Thu Mar 20, 2014 10:47 am

I disagree.Honda designed the cooling system with a thermostat.Keep it OEM period.
Why.???
The purpose of the thermostat is 2 fold.
It remains closed restricting coolant flow to allow the engine to reach operating temperature as quick as possible.This engine is designed to run best at 185*.Not 140 or 225.
Its second purpose is to regulate the flow of coolant to the radiator for maximum cooling efficiently.
Without a thermostat,the engine can be very slow to warm up (if ever)and can overheat under the right driving conditions,like a long uphill run with a heavy load.
Look for a Stant replacement at the auto store.About $7.

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SteveB123
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Location: Winchester, Ontario, Canada
Motorcycle: 1982 1100I, 60A Poorboy, MSD coil

Re: Thermostat

Postby SteveB123 » Thu Mar 20, 2014 1:15 pm

On occasion, some of us can out-engineer Honda, with modern materials and components....but not often.
This isn't one of those occasions.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

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virgilmobile
Posts: 7660
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Thermostat

Postby virgilmobile » Thu Mar 20, 2014 1:42 pm

Some technological improvements can be made(electrical) and even a few improvements on designed (gl1500 shifter pivot).... but this is a basic water cooled engine temperature control system...It's the same system that's used on all water cooled engines,big or small regardless of who made it or what machine it's used in...
Even my 3 cylinder diesel lawn mower has a thermostat...

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dingdong
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Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Thermostat

Postby dingdong » Fri Mar 21, 2014 8:50 am

A properly functioning thermostat is designed to restrict the flow of coolant even when fully open. No thermostat (no restriction) will cause the engine to operate at a lower than normal temperature . Lower than normal engine temperature equates to higher than normal fuel usage. I think I will leave mine in place.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

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Placerville
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Motorcycle: 1976 Naked Yellow

Re: Thermostat

Postby Placerville » Fri Mar 21, 2014 5:52 pm

All good observations.

Another important function of a thermostat is that it creates a reduced space for the water to traverse. So, same pressure behind the water from the pump but, a smaller opening, which results in a greater velocity or higher water pressure. (Like putting your thumb over the end of a hose to make it it squirt farther.) Removing the thermostat will enlarge the opening and lessen your water pressure. This results in the front of an engine running cool but, the back of the engine running hotter as the water isn't moving properly.

Some people will swear that their engine runs cooler with the thermo out. Well, they're partially correct, and here's why: Your temp sensor is located towards the front of your engine. With the thermo out, a greater volume of water is moving within the front of the engine. As a result, the temp sensor sends a false reading of a lower temp. In the meantime, the back of your engine is baking but, you don't know it. Why? Because there's no temp senor there. If you asked your 'well respected' mechanic to qualify his comment, I've no doubt that he'd say, "Because I took mine out and it started running cooler right away."

Any mechanic who'd tell you to take a thermostat out of an engine is poorly informed.

Here are good aftermarket thermos for your GL:

NAPA #101
Stant #13868
Murray #3868

And something I can never remember unless I look at the manual: The pointy side of the thermo points at you when installed and the little hole goes at 12 O'clock. ;)
Placerville- 1976 Yellow
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portugeezer
Posts: 424
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Location: Mchenry, Illinois
Motorcycle: 1976 gl1000
1982 Gl500
1984 Honda Magna V30

Re: Thermostat

Postby portugeezer » Fri Mar 21, 2014 6:35 pm

Thanks everyone! I'm going to replace it. Near the end of last year it would never warm up.

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dingdong
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Re: Thermostat

Postby dingdong » Sat Mar 22, 2014 7:59 am

A very simple explanation by Tom and Ray of Car Talk.

http://www.cartalk.com/content/you-shou ... thermostat
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

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portugeezer
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1982 Gl500
1984 Honda Magna V30

Re: Thermostat

Postby portugeezer » Sat Mar 22, 2014 1:14 pm

Just got home from Advance with a thermostat. Heading out to the garage right now!

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portugeezer
Posts: 424
Joined: Sun Feb 13, 2011 3:44 pm
Location: Mchenry, Illinois
Motorcycle: 1976 gl1000
1982 Gl500
1984 Honda Magna V30

Re: Thermostat

Postby portugeezer » Sat Mar 22, 2014 10:12 pm

Well, Replacing the thermostat wasn't too bad of a job. The bike warms right up now. Runs good. Now I'm having issues again with the wire splices that connect the vetter harness. I'm going to just solder them all the next time we have a warm day and I'm not working.

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Placerville
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Re: Thermostat

Postby Placerville » Sun Mar 23, 2014 11:45 am

Congrats. Job well done.


Placerville- 1976 Yellow
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