overheating problem

[ironfeather]

My 82 Goldwing was running great until I decided to change the coolant and found that it was running hot and found that there was air in the system and finally got it out by running the thing with the radiator cap off until it bubbled out. It ran fine for several months and now it is overheating again. The fan will not come on when it is up to operating temp which I think is because some air might be keeping the coolant from reaching the thermostat and activating it. The gas gauge is working fine so I don't think it is a problem with the 7 volt regulator. I have pressure as when the engine is running it pushes coolant out of the radiator. I can't find any air leaks where air could be getting into the system and so far I haven't been able to get any air bubbles out of the system either. I am open to any suggestions as I am not sure where to go from here. What is the best way to get any air out of the system. Please let me know if I am barking up the wrong tree.

[dingdong]

Check or replace the thermostat.

[scotterichmond]

There have been many post and many comments about "overheating" and I always have to say.......... what indicates it is overheating and did you check the temp. with a know good thermometer? That is an absolute must, unless it is boiling over. Until you can verify the gauge is accurate how can you know what the temp really is? what is the accual temp?

[ironfeather]

I have been using a Fluke 62 mini IR thermometer and I can say for sure it is running hot.

[ironfeather]

How do you get air out of the cooling system when changing the antifreeze? I have tried warming up the engine and letting it cool down and still can't get all the air out.

[WingAdmin]

How do you get air out of the cooling system when changing the antifreeze? I have tried warming up the engine and letting it cool down and still can't get all the air out.

You leave the radiator cap off, and let the bike idle. Have a look at step 15 of How to flush your cooling system