GL1500 Valve Thermo

[pricedjohn]

Hi it appears this part is no longer avaialble under the many different part numbers, as I am replacing the thermostat and piped and I have a leak at the Carb heat Exchanger I was going to replace this part while the bike is stripped down however I have been unable to find a part , so can anyone advise if mine fails when tested can it be bypassed by a hose ?

19330-MT8-004 VALVE, THERMOSTAT - ALL '90
19330-MW5-004 VALVE, THERMO - ALL'91
19330-MY4-004 VALVE, THERMO - ALL'91
19330-MN5-004 88-89
19330-MZ3-621 88-89

[DenverWinger]

If you already have the Thermostat out take it to your local Auto Parts dealer. I bet they can find an automotive one for an appropriate temperature that will work. Needs to be same diameter and thickness on the flange, and make sure it is no "taller" either above or below the flange and it should work fine.

Also check with your local Honda automobile dealer for the part #'s you listed, often the exact same part is used in a Honda Car and they may be able to get exact part.

However, if you haven't yet removed it, I'd just leave it alone. These very rarely fail....

[pricedjohn]

Thanks for the reply , I do have a Thermostat , it is the Coolant Valve Thermostat I require

Rgds John

[DenverWinger]

Part #2 below, correct?
If you need to replace that you should be able to find a generic Automotive replacement part which will fit.

If you are referring to part #6 you might have to settle for searching a used replacement, check with motorcycle breakers. I don't know what would result from bypassing it. I think it's to regulate preheating the intake manifolds, you'd probably be OK in the UK, but bypassing it would likely cause problems in a hot climate.

[Wing--Man]

Neighbor went through this issue.

Stock numbers were posted on the Wing/Facts site and they were thee wrong sizes, either too large or too small.

He had to take his thermostat to the parts store, NAPA I think, and match it up.

[pricedjohn]

Part 6 not part 2 I have a replacement for part 2

Rgds John

[ct1500]

Hi it appears this part is no longer avaialble under the many different part numbers, as I am replacing the thermostat and piped and I have a leak at the Carb heat Exchanger I was going to replace this part while the bike is stripped down however I have been unable to find a part , so can anyone advise if mine fails when tested can it be bypassed by a hose ?

When the engine is cold and warming up the valve is open allowing heated coolant to circulate and warm the carb riser and intake manifolds. By doing this certain hesitations and stumbling engine problems associated with carbureted cold engines are reduced/eliminated which aids driveability of the machine. The thermo valve is closed at 180 degrees F which happens to be the opening temp of the coolant thermostat. The valve closes cutting off hot coolant to the riser which helps prevent fuel vapor lock on a hot engine.

If it were my machine with no replacements available I would not just remove and plumb a hose in its' place. A better alternative would be to make/source a restrictor which would let a little coolant pass to aid warm-up somewhat but not enough flow to thoroughly heat soak the riser and manifolds when at operating temp.

[pricedjohn]

Thanks I did eventually get one from Japan

Rgds John