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Valkyrie Riders Cruiser Club > General > 1500 Tech Board > Thermostat bypass hole direction ?
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Author Topic: Thermostat bypass hole direction ?  (Read 1503 times)
ripper980
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*****
Posts: 27


Beeton, Ontario, Canada
« on: March 05, 2017, 01:01:00 PM »
I am changing out the thermostat on a 98 Tourer.
I have had 4 different Valks apart and all had the thermostat bypass hole facing the front of the bike from factory installation.
When reading the Honda shop manual, it specifies the bypass hole be placed to the rear direction of the bike..

Which is the correct direction ?

Thxs... Dan
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ride to work, work to ride Smiley
indybobm
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Posts: 1600

Franklin, Indiana VRCC # 5258
« Reply #1 on: March 05, 2017, 01:48:12 PM »
I really cannot see how it would make a difference as long as it is installed right side up, but it does not hurt to follow the manual.
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So many roads, so little time
VRCC # 5258
Firefighter
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Posts: 1165


Harlingen, Texas
« Reply #2 on: March 05, 2017, 06:09:40 PM »
Not a clue? I would follow the manual, could be because of the two sensors screwed into the housing. Might be the bleed hole keeps the warmest water at the sensor during warm up. Just a thought, cause I don't know, I would do as the good book says.
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2000 Valkyrie Interstate, Black/Red
2006 Honda Sabre 1100
2013 Honda Spirit 750
2002 Honda Rebel 250
1978 Honda 750
ripper980
Member
*****
Posts: 27


Beeton, Ontario, Canada
« Reply #3 on: March 11, 2017, 10:53:31 AM »
I put the other 3 in with the hole to the rear as the manual suggests...
No issues with them yet ..
Was just a thought on which direction and why ..

Thxs !
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sinner
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Posts: 9


HC SVNT DRACONES

Canberra OZ
« Reply #4 on: March 12, 2017, 07:26:15 PM »
When I was just a lad studying the black art of engineering, I asked the same question.

The answer was: If the thermostat is horizontal, it makes no difference, but if the thermostat is vertical the hole must be at the top.
The reason, apparently, is to allow any air that is in the system an escape.
This ensures that the business end of the thermostat is fully immersed in coolant.
I have always used this rule and never had a problem.
Hope this helps
 Evil
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98 Valk Tourer
83 CX650


Other than my Valk, my favourite pastime is turning beer into urine.
Grandpot
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Posts: 630


Rolling Thunder South Carolina Chapter 1

Fort Mill, South Carolina
« Reply #5 on: March 13, 2017, 01:29:35 PM »
+1 for Sinner
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crazy2 Experience is recognizing the same mistake every time you make it.crazy2
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