cooling problem
08-18-2005, 10:15 AM
#1
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cooling problem
Today I returned to home. It was a warm day.
Riding in town, the temperature increased to 110°C = 230°F.
The fan did not start.
When I reached home, the temperature increases to 112°C = 233°F and I stopped the bike.
The "cooling tank" rejected some antifreeze per its higher hose (1/4 liter) with a little sound like "blubblublub" near the "thermostat".
I switch the key on with motor stopped: the fan didn't start, temperature at 112°C-230°F.
I waited until temperature decreased to 110°C (230°F) and restarted the bike.
The fan does not started until it reached 112°C (233°F) and then started.
Then temperature decreased to 110°C (230°F) then fan stopped and the temperature reincreased to 112°C (233°F) then fan restarted and so on.
Usually, the fan starts at 108°C-226°F (that is high my taste) but today, it started at 112°C-233°F and I lose some antifreeze.
What should I check ?
bleeding cooling system ? Replace Thermocontactor on the radiator ?
Thermostat ? Too much cooling antifreeze ?
I've checked antifreeze level last week and it was precisely at the "full" mark on the "cooling tank"
Riding in town, the temperature increased to 110°C = 230°F.
The fan did not start.
When I reached home, the temperature increases to 112°C = 233°F and I stopped the bike.
The "cooling tank" rejected some antifreeze per its higher hose (1/4 liter) with a little sound like "blubblublub" near the "thermostat".
I switch the key on with motor stopped: the fan didn't start, temperature at 112°C-230°F.
I waited until temperature decreased to 110°C (230°F) and restarted the bike.
The fan does not started until it reached 112°C (233°F) and then started.
Then temperature decreased to 110°C (230°F) then fan stopped and the temperature reincreased to 112°C (233°F) then fan restarted and so on.
Usually, the fan starts at 108°C-226°F (that is high my taste) but today, it started at 112°C-233°F and I lose some antifreeze.
What should I check ?
bleeding cooling system ? Replace Thermocontactor on the radiator ?
Thermostat ? Too much cooling antifreeze ?
I've checked antifreeze level last week and it was precisely at the "full" mark on the "cooling tank"
08-18-2005, 12:40 PM
#4
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Because your problem is a relatively minor variation, rather than major overheating. The cap can't really be tested without a special tool and is pretty cheap.
There is a car cap that fits it for about five bucks. Any 16-18 lb cap that fits is within spec.
I'm assuming you are sure you have no air in the system. You bleed it by snapping the throttle a few times with the cap open.
There is a car cap that fits it for about five bucks. Any 16-18 lb cap that fits is within spec.
I'm assuming you are sure you have no air in the system. You bleed it by snapping the throttle a few times with the cap open.
08-18-2005, 01:11 PM
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Re: cooling problem
I've changed coolant last year and bleed it.
Now, I don't know ...
You think I could find a car radiator cap ? then it would be cheap ;-)
Which car ?
16 or 18 lb is the same as 16/18 psi ?
Then equivalent to 1.1 bar
Now, I don't know ...
You think I could find a car radiator cap ? then it would be cheap ;-)
Which car ?
16 or 18 lb is the same as 16/18 psi ?
Then equivalent to 1.1 bar
08-19-2005, 07:46 AM
#7
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The Honda testing standard for the stock cap is 16-20 lbs. Any 16 or 18 lb cap that is the right size will work. Take your old cap and match it to a car cap to save dough. If I remember correctly (an iffy proposition) Toyota caps are the same.
08-19-2005, 11:33 AM
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Re: cooling problem
ok thanks ;-)
I've checked one thing.
Starting the bike in the garage and waiting for it reaches 105°C-221°F, the expansion is beeing filled at mid level of its complete volume.
The fan starts today at 106°C but it's a colder day and I don't have ride the bike.
Sounds like the radiator cap open too early no ?
radiator cap is stamped 1.1 (1.1 bar = 16psi), at which temperature would the cap open normally ?
Only the radiator cap can fill the expansion tank ?
I've checked one thing.
Starting the bike in the garage and waiting for it reaches 105°C-221°F, the expansion is beeing filled at mid level of its complete volume.
The fan starts today at 106°C but it's a colder day and I don't have ride the bike.
Sounds like the radiator cap open too early no ?
radiator cap is stamped 1.1 (1.1 bar = 16psi), at which temperature would the cap open normally ?
Only the radiator cap can fill the expansion tank ?
08-19-2005, 12:55 PM
#10
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Re: cooling problem
why dont you just jumper the thermostat switch and turn it on all the time?
We do that all the time,this is a warm climate down here,mine its still not jumpered but I will do it.
Now that we are talking temperature,when I ride,highway,at spirited pace the temperature is around 180-190F,but whan I race my piece,it goes up to 215-218 at full pace,I thouh they were suposed to cool better at hi speed,but it seems there is one hell of a good work load on the engine when its pushed.Anyone has experience about this?
We do that all the time,this is a warm climate down here,mine its still not jumpered but I will do it.
Now that we are talking temperature,when I ride,highway,at spirited pace the temperature is around 180-190F,but whan I race my piece,it goes up to 215-218 at full pace,I thouh they were suposed to cool better at hi speed,but it seems there is one hell of a good work load on the engine when its pushed.Anyone has experience about this?
08-19-2005, 01:52 PM
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08-20-2005, 02:45 PM
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Re: cooling problem
I've replaced the radiator cap by a "used" one. Cost me 5 bucks.
Seems that it works !
- The coolant now doesn't fill the expansion tank at 105° (level increase only very few)
- the hose that goes from the radiator cap to the expansion tank is not hot, telling me that no coolant is flowing here
- fan kicks up at 106°C
- no "blublubblub" sound after several cooling cycles
Thanks a lot Jschmidt
Seems that it works !
- The coolant now doesn't fill the expansion tank at 105° (level increase only very few)
- the hose that goes from the radiator cap to the expansion tank is not hot, telling me that no coolant is flowing here
- fan kicks up at 106°C
- no "blublubblub" sound after several cooling cycles
Thanks a lot Jschmidt
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