Cooling liquid gone from reservoir!

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ghostwriter78
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Cooling liquid gone from reservoir!

Post by ghostwriter78 » Mon Mar 26, 2018 12:11 pm


After washing bike noticed that coooling liquid is gone from reservoir.

I’m now in break-in period and at about 600km. I checked couple of days ago and it was between low and high mark.

Oil (see third pic) is darker but not cloudy or milky.

Tried starting bike, warming it up. After cooldown again radiator is still full with liquid and reservoir empty.

Any tips? :help:


PS. That person who put a cooling liquid reservoir made of plastic next to a superhot engine should look out for another job. Makes no sense. :doh:
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Current: H2 SX SE 2018, FZ6 2010, CB1 :D
Sold: R6 2008, 2x CBR650F ('14/'17), CBR500R, CBR250R

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kman0066
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Re: Cooling liquid gone from reservoir!

Post by kman0066 » Mon Mar 26, 2018 12:27 pm


The reservoir doesn't hold much. Top it off, may have just had some air in the system that got taken up by the small amount in the reservoir. If it gets low again, time to take it in for warranty.
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cOoTeR
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Re: Cooling liquid gone from reservoir!

Post by cOoTeR » Mon Mar 26, 2018 2:11 pm


I'm with kman0066 but I'd take it to the dealership to top it off of it's not to much of a pain to get the bike to the dealership. Two main reasons why I'd go to the dealership are, 1. So you don't have to pay for the coolant. You already paid them for it with the purchase of the bike and the prep fees. 2. If there is a problem it will be on record now. They should have bled the system better but mistakes happen and it's common to need to top off a system that's was empty. The level in the reservoir will vary as the engine changes temperature.

I don't think it has anything to do with the placement of the reservoir. Even if it was pure water in the reservoir the engine heat would have to heat the water inside it to over 212°F (100°C) to get it to boil. 50/50 coolant mixes normally don't start boiling until around 223°F (106°C) I think the plastic would start to melt before the temperature inside got that high due to engine heat.

Keep an eye on your engine temperature though don't let it run hot.
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Stock with airfilter 164whp 84ft.lbs
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Full vandemon exhaust with tune 221whp 99ft.lbs
On Race Fuel 233whp 103ft.lbs

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ghostwriter78
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Re: Cooling liquid gone from reservoir!

Post by ghostwriter78 » Mon Mar 26, 2018 5:19 pm


thanks :) dealer is ca 100km away, so im gonna just top up first..

sadly the reservoir cap is hard to reach and cant be opened without a large hex key :(

after what time can this happen?
e.g. i drove from dealer 100km to home and when i arrived it was within marks on reservoir, actually drove a few days more and didnt notice the loss of liquid in reservoir. also engine didnt show hot and radiator is 100%full with coolant. now at 600km
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Re: Cooling liquid gone from reservoir!

Post by cOoTeR » Mon Mar 26, 2018 7:20 pm


What happens is air can get trapped in the system when filling it. It normally works it's self out within a few temperature cycles. Air can get trapped in higher parts of the coolant system until it gets forced through by the coolant. This can cause the radiator and reservoir to appear full because the air is taking up space the coolant should be in.

As the coolant heats up out builds pressure in the system. Once the pressure hits a certain point the spring on the radiator cap allows the extra coolant to overflow into the reservoir. Often times the trapped in the air is forced into the reservoir aswell because the radiator cap is normally the highest point in the system and that's where the air will eventually work itself to. Now as the coolant cools there is less pressure in the system and it creates a vacuum that sucks the coolant in the reservoir back into the radiator.

The amount of time it takes for this to happen would depend on how much air was in the system and the heat cycles the coolant system is going through.

If your reservoir is completely empty the system probably sucked more air in. If too much air gets it out can prevent the system from flowing properly which could cause your bike to overheat. So watch your engine temps until you get it figured out.
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Stock with airfilter 164whp 84ft.lbs
De-restricted + tuned 213whp 97ft.lbs
Full vandemon exhaust with tune 221whp 99ft.lbs
On Race Fuel 233whp 103ft.lbs

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