BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!! - Honda Motorcycles - FireBlades.org
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post #1 of 24 Old 03-14-2009, 4:39 PM Thread Starter
 
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BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

Took my bike out for its first voyage (actual ride). Got stuck waiting for a train and noticed the temp gauge climbing....215....225.....235....245...255....262 !!!! Temp light came on...I was in town so I couldnt get wind into it...I pulled over and the coolant was boiling over!

-So this is what I do know and the conditions.
-Bike runs perfect.....
-No coolant coming from head gasket and no smoke out tailpipe......
-Oil if fine.
-While riding in about 50 degree weather it runs about 170-190 in traffic and at lights it Climbs real quick.....
-Fan is working....
-Only boiled over the one time when it reached over 260....!! WOW I hope it didnt **** anything up.

-The coolant could be 30 years old for all I know....(just bought the bike).
-I did blow the fuse for the rear lights......but thats the only one. The fan fuse is fine.
-Mods....just a two brother slip on and the flapper mod...new plugs, oil etc.

So where do I start? Radiator? thermostat? Water pump?....please don't say water pump........!

-The radiator looks fine..for the most part the fins are fine and there are no leaks.....Could bad coolant let the engine get that hot? I would think even water would keep it cooler than that.....?

How do I tell if the water pump is working right? What do I do now??



Oh and the second part is that the brake lights wont work....running light are fine all other lights are fine but they dont get brighter when I pull on the front or rear brake.........??????? I tested the green and yellow wire and one doesnt get power at all and the other has constant power light a runnig light.............???......any ideas?
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post #2 of 24 Old 03-14-2009, 4:46 PM
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

Had the same when i got my 900.....

... temp sender had gone so fan didn't cut in.... replaced an was fine

As long as I fall, I don't hit the ground. As long as I fall, I'm safe & sound.
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post #3 of 24 Old 03-14-2009, 4:52 PM Thread Starter
 
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

My fan working normally i think......starting to spin at about 220 temp..ish..
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post #4 of 24 Old 03-14-2009, 5:00 PM
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

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Originally Posted by temperedtim929 View Post
My fan working normally i think......starting to spin at about 220 temp..ish..
Damn!! i should learn to read... you said fan worked in first post

..... guess (asuming your coolant level is fine) it's check thermostat next and then that pump is working.....

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post #5 of 24 Old 03-14-2009, 5:41 PM Thread Starter
 
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

K... how do I check either???? and ya my coolant is fine...little dark but there is still coolant in the overflow...
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post #6 of 24 Old 03-14-2009, 5:59 PM
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

thermostats you usualy suspend in boiling water and check they open at required temp..... think about 80/90 deg C and then check how far it opens...

pumps i don't know... think they mechanical directly run.. so if bust will be obviously broken...

best to get a manual for exact specs/etc

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post #7 of 24 Old 03-14-2009, 6:03 PM Thread Starter
 
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

Thanks Sideshow....anyone else got an opinion?
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post #8 of 24 Old 03-14-2009, 7:37 PM
 
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

Used bike? I'd change most of the fluids out as a start (radiator, brake, oil) and for sure check some of the longer items (like front forks). If your pump wasn't working, you'd know pretty quick - the engine would overheat much sooner. So, that's likely not the main issue..

I'd start with the radiator cap, and while you're at it, make sure the coolant is correct level inside the radiator by looking inside the radiator. If the cap is bad (which requires a pressure check), you might not have the reservoir working properly, and in addition, it can cause the boil over problem you're describing (it won't hold enough pressure to keep the boiling point higher). Then I'd move onto the water pump and the thermostat - at this point, you're into some major removal, so would make sense to check them both..

If you hear the fan kicking in, you know the fan and relay are good. Testing the temperature sender comes along after checking the pump and thermostat..
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post #9 of 24 Old 03-14-2009, 8:31 PM
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

Check the coolant level and the thermostat.
If the thermostat isn't opening the coolant won't be circulating through the radiator so the fan won't make any difference.

"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder
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post #10 of 24 Old 03-15-2009, 12:13 AM Thread Starter
 
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

So tomorrow if my radiator remains "cool" to the touch...that would mean that the thermo isn't opening and all the "cool" coolant is just sitting in the radiator, right?? And if its piping hot then i should look somewhere else...? Is the thermo as easy on these bikes as it is in an automobile?

Final thought. I want to take another ride in the morning.... as long as I keep the temp below 220 during idles and stuff there shouldnt be a major issue with riding it right...I mean cool is cool and hot is hot right? The enigne doesnt know its not being cooled right as long as it stay cool.......
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post #11 of 24 Old 03-15-2009, 12:22 AM
 
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

Should be OK. The thermostat works the same way as a cage does.. Just a bit harder to get at..

I'm not sure about your test touch - maybe someone else can answer that. Again, I'd be sure to check the coolant level in the radiator. And from your description, it sure sounds like the coolant needs changing (you can check its gravity and determine if the correct anti-freeze ratio is there).
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post #12 of 24 Old 03-15-2009, 12:28 AM Thread Starter
 
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

Oh ya..... it was on my list but I got anxious to ride so put it off. The coolant will be replaced as soon as I figure out what else needs to be replaced.

What about my morning ride in the AM....think its prob ok if as long as I keep the temp down?? nice long roads without stops?
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post #13 of 24 Old 03-15-2009, 12:43 AM
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

Since it's already boiled over at least once definately check the coolant level.
If the coolant drops below the level of the temp sender the temp will drop back to "normal" even though the engine is overheating because it needs to be immersed to read correctly.
Not sure about touching the radiator as it'll still be taking radiated heat from the headers at least.
Assuming you do have enough coolant in the system then riding should be fine if you keep an eye on the temp.
You must keep in mind that you have an aluminium engine with an aluminium head. When you heat aluminium it warps but it doesn't return to its original shape. A steel engine you can overheat it until it actually stops running, let it cool down and it'll probably be fine. You can't do this with aluminium engines.
The thermostat is the same as a car but you'll have to lift the tank to get to it. If the thermostat is opening you'll see the coolant move in the radiator as it opens while warming the engine up.

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post #14 of 24 Old 03-15-2009, 12:46 AM
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

And if you've just bought the bike replace _all_ the fluids.
Brakes, coolant, oil and filter.
And inspect the fluids for anything nasty like rust or metal. If it's been running water instead of coolant you might have problems with corrosion in the system.

"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder
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post #15 of 24 Old 03-15-2009, 12:53 AM Thread Starter
 
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Re: BIIIG OVERHEATING PROBLEM...small brake light problem...WTF!!!

So do you think my 260 temp problem damaged anything...it ran fine after..??
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