Bike over heating

Joz

Joz

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Hi, I have a 2007 sv650 and today my bike is making a high pitch sound when the temperature hits 104 celcius. I think that is the warning for the engine over heating. It is okay when I am on the hwy.. it won't over heat. It is just in the city. I also noticed that the fan to the radiator is not spinning so i tthink that is the main reason. It might be the coolant level as well... do anyone know where I can fix the fan.. and would that be the cause of the high pitch sound at 104 Thansk
 
My RR does that, and 104c the fan kicks in which makes kind of a high pitch noise. But it only spins above 104C so if you're checking if the fan is working or not below 104C, it most likely will not be running.

Try checking it again when its above 104 degrees.
 
So far, what I am reading of your description sounds like completely normal operation.

The "high pitch sound" that you are hearing when the temperature reaches or exceeds 104 C is most likely the cooling fan. It will not be operating at lower temperature or when the engine is switched off. Try having a look at that fan WHEN that "high pitch sound" is occurring while the engine is still running.

And, 104 C is not "overheating". It's a rather normal operating temperature when stuck in traffic.

If the fan really were not operating, the temperature would keep right on going up and up and up, until steam and coolant boils over out of the radiator and the overflow tank ...
 
You're not overheating until around 118-120C which is probably when the light comes on anyway. In other words, if you truly overheat, you'll know it.

The fan kicks on at 104. That's the sound you're hearing. If the temperature then remains steady or drops, its working fine. Also it only takes 2 seconds to hop off your bike and look at the fan to see if its operational.
 
Normal operation, a coolant change won't do anything if your fan is not working. Water Wetter is only for when you going to do a track day and you have to flush your coolant and only put distilled water on your radiator. Water wetter in coolant is not necessary.

Your bike is fine
 
I recently had a problem with my bike overheating in stop and go traffic. Once I get moving, the temp goes down and on the highway it goes even lower. The fan was kicking in when it was supposed to. For me, it was just low on coolant, needed about a liter and all was well after that. Just check your coolant level before you take it to a shop and spend some $$$$.

Good Luck!
 
I would be willing to bet there is a small stone or something lodged in the fan.
When it turns, it binds up against the stone and the body of the fan.
Remove obstruction.
 
I have the same bike and the fan does kick in at 104, but you would be hard pressed to hear it over the sound of the motor. I bet the bearings in the fan are going causing the squealing noise.

Best thing to do is connect the fan up to 12 volts with the bike not running so you can hear whats going on with it. It would be better to replace it before it stops working because you could overheat and damage the engine.

Send me a PM if you want to stop by and I can take a look at it for you.
 
Brian P said:
It will not be operating at lower temperature or when the engine is switched off.
Click to expand...

IIRC, I think the fan will still be functional even if the engine is turned off, but only if the ignition is in the ON state, and temp is 104 or over. At least this holds true for my bike.
 
Kuro said:
IIRC, I think the fan will still be functional even if the engine is turned off, but only if the ignition is in the ON state, and temp is 104 or over. At least this holds true for my bike.
Click to expand...

my fan turns off once i turn the engine off (ignition still on) and the temp is over 104....
 
Kuro said:
IIRC, I think the fan will still be functional even if the engine is turned off, but only if the ignition is in the ON state, and temp is 104 or over. At least this holds true for my bike.
Click to expand...
This should be the case for most vehicles. In some the fan will even keep going without the key in the ignition.
 
slow said:
my fan turns off once i turn the engine off (ignition still on) and the temp is over 104....
Click to expand...
My fan stays on (or more annoyingly comes on due to heat soak) even if the engine is off but the key is in the on position. I think my fan comes on at 101. I've never seen it get to 104 =)

-Jamie M.
 
toysareforboys said:
My fan stays on (or more annoyingly comes on due to heat soak) even if the engine is off but the key is in the on position. I think my fan comes on at 101. I've never seen it get to 104 =)

-Jamie M.
Click to expand...

I've seen it go to 115 while sitting in rush hour traffic on the 401.....that day was brutal tho....high 30's...I think I'm going to have to start wearing hockey shin guards soon...
 
slow said:
I've seen it go to 115 while sitting in rush hour traffic on the 401.....that day was brutal tho....high 30's...I think I'm going to have to start wearing hockey shin guards soon...
Click to expand...
Wow! I ride in shorts and 100 feels bad =(

-Jamie M.
 
Hey guys,

Thanks for all your inputs. I think I am going to check the coolant level when I get home today.

I have never had this happen to me before even on hot days that reaches 40 degree. It was only 25 degree when this happened to me. The manual told me not to ride the bike over 104 or else it will damage my engine which is weird because I know the fan don’t kick in until 104.

The other thing is… when I turn off the bike I don’t see my fan spinningHey guys,

Thanks for all your inputs. I think I am going to check the coolant level when I get home today.

I have never had this happen to me before even on hot days that reaches 40 degree. It was only 25 degree when this happened to me. The manual told me not to ride the bike over 104 or else it will damage my engine which is weird because I know the fan don’t kick in until 104.

The other thing is… when I turn off the bike I don’t see my fan spinning
 
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