coolant - Wrist Twisters
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post #1 of 19 Old 03-22-2016, 08:10 PM Thread Starter
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coolant

About to change my coolant and thought id check i have the right coolant.

I've got these 3 coolants on hand... I don't see silicate free mentioned anywhere...
So let me guess, can't use um?
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post #2 of 19 Old 03-22-2016, 09:30 PM Thread Starter
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another dumb question..
all the directions for refilling with coolant say in summary:
"fill it up at the radiator neck, fill up the reserve tank. start the bike and let idle, blip the throttle a few times, top it off and replace the radiator fill cap"

am i understanding you leave the radiator cap off during that procedure?
Isn't coolant gonna shoot out of it?

i read a post from rob saying to put some rubber over the radiator fill neck and hold it down with a gloved hand cause it will get hot.

why not just replace the filler cap? prevents air escape?

so far managed to drain the coolant and only lose a drop.. but i did drop the drain plug sealing washer into the bucket of coolant

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post #3 of 19 Old 03-22-2016, 10:28 PM
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I use the Prestone Stuff on the left. Definitely don't use the Dexcool. Find a dumpster and throw that shit away! If you mix that with green antifreeze it will coagulate and clog up the system. Not sure about the WalMart stuff.

If you leave the cap off the coolant wont shoot out if you run it just long enough to get the air out.

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post #4 of 19 Old 03-23-2016, 06:42 AM Thread Starter
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Quote:
Originally Posted by marylandmike View Post
I use the Prestone Stuff on the left. Definitely don't use the Dexcool. Find a dumpster and throw that shit away! If you mix that with green antifreeze it will coagulate and clog up the system. Not sure about the WalMart stuff.

If you leave the cap off the coolant wont shoot out if you run it just long enough to get the air out.
haha thanks Mike. I think the Dexcool might be what my car takes. It's a Saab so the GM spec makes sense..

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post #5 of 19 Old 03-24-2016, 12:02 PM
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If you leave the cap in it can creat a vacuum when you blip the throttle and the air escapes. When the bubbles come up the amount of coolant should drop. Also some time when you start the bike and the water pump kicks in the amount goes down for you blip the throttle. So you don't want to creat a vacuum. Blip the trotted and squeeze the hose if you can fill it up to the neck and reap until no more bubbles come out.

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post #6 of 19 Old 03-27-2016, 08:59 AM
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Flushing my 20,000 mile coolant and refill using only the best.
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post #7 of 19 Old 03-27-2016, 09:09 AM
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I'm a genuine honda parts only nazi. The fact that I've been a tech at our local Honda dealer has taught me many a lesson. But one being that if you own a Honda-keep it Honda. Most buy a Honda because they are reliable, so why tamper with that ?

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post #8 of 19 Old 03-27-2016, 02:17 PM
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I've always used Honda premix and never had any problems.
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post #9 of 19 Old 03-27-2016, 02:36 PM
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I use the prestone on the left in your pic.

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post #10 of 19 Old 03-27-2016, 04:01 PM
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Quote:
Originally Posted by hondatech9 View Post
I'm a genuine honda parts only nazi. The fact that I've been a tech at our local Honda dealer has taught me many a lesson. But one being that if you own a Honda-keep it Honda. Most buy a Honda because they are reliable, so why tamper with that ?
Where are you buying your stock Honda PAIRS block off plates?

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post #11 of 19 Old 03-28-2016, 12:15 PM
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Hey, about how long does a coolant flush take y'all. I am fairly certain one has never been done on my bike and I have 21.5k miles. I won't have time to have my bike out of commission for a full day or two until julyish

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post #12 of 19 Old 03-28-2016, 12:41 PM Thread Starter
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you don't need anything special to do it. probably allow 2 hrs if you're slow like me. Search coolant change and you'll find some detailed threads.. but you're basically just lifting the tank, loosen drain plug, unclamp the hoses at the pump and dump them if you want (you'll get some more fluid out but if you're flushing it, it doesn't really matter). some time for flushing/siphoning the oveflow tank. refill it and you're done.
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post #13 of 19 Old 03-28-2016, 01:05 PM
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Quote:
Originally Posted by Jonstrocity View Post
Hey, about how long does a coolant flush take y'all. I am fairly certain one has never been done on my bike and I have 21.5k miles. I won't have time to have my bike out of commission for a full day or two until julyish
It may have been done at 16k when the valves should have had their first check. I don't have the maintenance manual or the owners manual in front of me right now but it shouldn't need to be changed until the next valve check. Honda says to reuse the old coolant but just change it.

I too am a huge fan of keeping OEM parts and fluids in the bike. There might be better stuff out there or there might not be. But the Honda quality comes from all things Honda not just the engineering.

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post #14 of 19 Old 03-28-2016, 01:14 PM
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Originally Posted by 07919Dave View Post
It may have been done at 16k when the valves should have had their first check. I don't have the maintenance manual or the owners manual in front of me right now but it shouldn't need to be changed until the next valve check. Honda says to reuse the old coolant but just change it.

I too am a huge fan of keeping OEM parts and fluids in the bike. There might be better stuff out there or there might not be. But the Honda quality comes from all things Honda not just the engineering.
I was probably going to go with honda coolant. Didn't know if there was a better option or not. It gets pretty toasty here in south texas, and I'd like to keep my temps down as much as possible

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post #15 of 19 Old 03-28-2016, 01:25 PM
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Originally Posted by Jonstrocity View Post
I was probably going to go with honda coolant. Didn't know if there was a better option or not. It gets pretty toasty here in south texas, and I'd like to keep my temps down as much as possible
Distilled water is more than enough for a 919 in south Texas. Cheap too! Why would I do such a crazy thing? Because Ethylene Glycol has about 1/2 the heat capacity of water, even in a 50/50 mix you're looking at 75% of the heat capacity of pure water. It's a great anti-freeze, but since I see freezing temperatures for 4-12 hours at a time outside (very rarely in my garage) I don't see the point.

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post #16 of 19 Old 03-28-2016, 02:36 PM
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Originally Posted by beefsalad View Post
Distilled water is more than enough for a 919 in south Texas. Cheap too! Why would I do such a crazy thing? Because Ethylene Glycol has about 1/2 the heat capacity of water, even in a 50/50 mix you're looking at 75% of the heat capacity of pure water. It's a great anti-freeze, but since I see freezing temperatures for 4-12 hours at a time outside (very rarely in my garage) I don't see the point.
One night below freezing in your garage could change your mind awfully quick

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post #17 of 19 Old 03-28-2016, 04:21 PM
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You could also dilute it down to 30% and still have freezing protection. Does this really benefit a street 919 even in places that see 90-100* riding weather? Probably not.

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post #18 of 19 Old 03-28-2016, 05:25 PM
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Do not run straight water in your cooling system. You need some kind of lubricant properties added, whether it is anti_freeze, engine wetter. Etc.

I'm still on the original coolant with 46k on the clock, still looks new and clean. Granted. It's been filled partially at various times when I've worked on it. I will be doing my first flush with thermostat replacement soon.

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post #19 of 19 Old 03-28-2016, 06:14 PM
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I have never flushed mine. Just partial drain and refill when doing valve checks. Coolant always comes out pretty clear.

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