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I got tired of removing the plastic covers when I put in coolant so I put this funnel extension gizmo together. Now to add coolant ,I just reach in and pop the top of the overflow bottle hose off the radiator end with some pliers to remove the hose clamp and put the white end of the funnel extension into the overflow hose and add coolant. Don't have to take any thing off that way or remove the overflow bottle cap.
Spud my RX3 has 4500 miles on it and the coolant has gone down a little when out on long rides. I carry a bottle of coolant with me but now I am confident its not needed as the coolant takes a lot of miles before it gets very far down in the overflow bottle. I'll try it out this coming week at the Sound Rider Rally in the Gorge .rj |
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You don't need much fluid; just enough to keep the hose end immersed. Is there a min/max indication? |
While on this subject, has anyone measured the full capacity of that little bottle? It's not very big and looks to be thick walled.
I'm guessing less than a cup (8oz) total. So about twice my bladder capacity.:ohno: |
Spud, sorry I missed your water pump comment in your first post. I checked my cap for tightness and it's fine. I would not leave the overflow tank dry, as it needs a prime to function properly, however, as long as one regularly checks the fluid level in the radiator, the overflow tank is superfluous.
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Hey Spud, my cap has been an issue since the beginning. It pops off easily when tightened. I get it snug, not too tight, and then I find it popped later. I assumed my periodic coolant loss was due to spillage. The last time I was refilling I did notice a tiny vent hole in the cap, so even if the cap is fully sealed the system should be able to vent through the hole. My cap threads appear to be fine when I look at them, so I have been suspecting the bottle threads are "bad". I just haven't had the time to pursue it further. I switched from filling the "overflow" bottle through its cap to filling through the radiator cap. If you have the bike on the side stand and fill it slowly with a funnel, it overflows into the bottle just before it would overflow out of the radiator (I picked up that technique somewhere from another RX3 owner). I can unscrew the radiator cap without removing any panels, so that seems to work better for me.
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I'm thinking we are about the same age, Jay. ;) :lol: |
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Thanks for verifying the tight fit of your bottle cap. You have further confirmed my suspicion that I have a bad bottle and cap. :) I also agree with you comment regarding checking the coolant level in the radiator. However, I can't unscrew the radiator cap without removing the fairing, so it is much easier to check the level of the coolant overflow bottle. ;) The coolant level in my radiator remains topped off, so I must assume my overflow bottle and cap are damaged, don't seal, and the coolant is evaporating from the overflow bottle. ;) I will either confirm, or refute this theory after I receive a new overflow bottle and cap from CSC. :) |
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I see you are using RJ's method of filling the overflow bottle. If you don't need to remove the fairing to unscrew the radiator cap, you must have small hands. ;) |
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The overflow bottle has min/max markings. Therefore, when we say 'fill' the overflow bottle, we realize we are supposed to add coolant to a level between the two markings. ;) |
If you translate that to car language, max becomes full hot, and min becomes full cold.
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"Full Hot" and "Full Cold" are much more descriptive labels than "Min" and "Max." The "Min" term seems to indicate the coolant is disappearing to a certain minimum value, rather than reaching its natural, maximum level, when the coolant is cold. ;) The "Min" marking on the coolant overflow bottle of the RX3 is very near the bottom of the bottle. Therefore, one should only see about 1-inch of coolant in the bottle when the engine is cold. The coolant might rise to the "Max" level when the radiators are very hot, but it will naturally drop to the "Min" level when the bike is parked overnight, et cetera. If one fills the overflow bottle with coolant above the "Min" level when the engine is cold, it will merely be vented out the cap when the coolant temperature rises. Also, as AZRider stated, the main task is to confirm the radiators are full. ;) If the radiators remain full, one shouldn't be concerned if the coolant in the overflow bottle reaches the "Min" level when the engine is cold. Indeed, this is the normal operation of the "overflow" bottle. ;) Thank you, gentlemen. :tup: |
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