[phannosh]

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My 84GL1200 has been getting very close to the redline on temperature gauge. I was thinking it could be the thermostat but the parts guy said that he has never ordered the thermostat in 10 years but that the waterpumps are a frequent replacement on this bike.

Is there a test to see if either of these are not functioning and causign overheating? The bike gets real hot in less than half hour. The expansion tank has coolant. Any feedback would be great.

kind regards,

 

[William_86]

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remove the thermostat, might be stuck close. will not harm to run the bike without it.

 

[mikef]

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Is the fan working?

 

[hockeydad33]

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You might want to take the radiator off and have it flushed and the pull the front housing on the waterpump and check the play on the impellers. Pull the thermostat andsuspend it in a pan of water and thenbring the water up to boiling to see if the thermostat opens up. I wouldn't run the bike too long without a thrmostat because the water may flow through the radiator so fast that it doesn't have a chance to disipate the heat. It isn't that difficult to do these things, just a little time consuming.

 

[mikef]

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hockeydad33 wrote:

You might want to take the radiator off and have it flushed and the pull the front housing on the waterpump and check the play on the impellers. Pull the thermostat andsuspend it in a pan of water and thenbring the water up to boiling to see if the thermostat opens up. I wouldn't run the bike too long without a thrmostat because the water may flow through the radiator so fast that it doesn't have a chance to disipate the heat. It isn't that difficult to do these things, just a little time consuming.

Yeah, do all that and see if the fan is working, while you're down there. You don't give your location. If you are in Texas, I believe it has been over 100 degrees for the last 2 years........

 

[phannosh]

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Thanks guys for all the valuable info. I just purchased a new water pump on the advice of the parts guy so I'll flush out the radiator while I'm at it. I'm in cali and it has been hot here but the bike has never gotten this close to the redline. I also noticed in checking my bike that it seems to be running on 3 cylinders. That may be adding to the heating issue.

 

[Bike...and Dennis]

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Too bad you ordered the water pump. If you are running on 3 and overheating, it sounds more like a head gasket problem.

Parts salespeople are not your friend.

 

[phannosh]

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I had some work done on the carbs a while back and there is rust in my tank. How can the head gasket cause a dead cylinder?

 

[mikef]

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Sounds like your bike may have a few issues. You know all the symptoms.

 

[Bike...and Dennis]

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phannosh wrote:

How can the head gasket cause a dead cylinder?

:baffled: :? :shock:

Sorry, I don't know how to respond to that.