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Post by wxguru on Jul 15, 2008 20:16:00 GMT -5
I am changing the antifreeze out....how long does it take for this thing to take its final burp?
And can I let the engine idle while it is on the H? Fan hasn't come back on yet...so I still have air in the system.
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Post by my first scoot on Jul 15, 2008 20:30:46 GMT -5
Wxguru, how many hoses do you have on your thermostat?
Is there one on the side of the stat and one on top? If so, be careful when doing this. water hot. remove the one that is on top of the stat and let the water come out then shut off scoot and and put the hose back on. Have a rag handy for the water. I believe this is a bleeder hose and will let the air out that is trapped near the stat so it can open up. Try it and let me know.
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Post by yarddogbbq on Jul 15, 2008 20:32:40 GMT -5
wxguru, does your carb have an air bleed screw like the one below near enrichner.  if it does take it out and fill the radiator with coolant till it comes out. you might not have this screw. yarddog |
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Post by wxguru on Jul 15, 2008 20:58:45 GMT -5
Is that the screw on the CFMOTO carb or the Linhai carb>
I am really frustrated! I kept putting it in, it would burp some, but most of the coolant was going to the overflow. Then, it was bouncing up and down in the radiator cap portal, and coming out and spilling....what am I doing wrong?
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Post by wxguru on Jul 15, 2008 21:03:00 GMT -5
No, I don't have that screw
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Post by wxguru on Jul 15, 2008 21:06:27 GMT -5
A quick question....do I need to have the overflow tank cap on before I burp the system?
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Post by wxguru on Jul 16, 2008 7:41:21 GMT -5
I still have yet to figure out how to get this thing to burp out all the air. I did pull the top hose on the thermostat housing, some fluid did come out, but not really any air. I put it back on, and still no fan (worked fine before I started the change). I have lost/wasted alot of coolant, as it is either overflowing out of the excess reservoir, or when I am watching it in the radiator cap fill area.....sometimes, it will suck down then come back up violently and roil over onto the motor...which is hot, and then it stinks! Please help a frustrated scoot owner! I miss the ride!  Anything else I can try without tearing off the panels? |
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Post by cat0020 on Jul 16, 2008 7:56:51 GMT -5
When I change out my coolant, I drain the reserve tank and radiator, rock the scooter front and back side to side, lift the one side of the scooter up by placing a wooding block under one side of centerstand.. then the other side.
I squeeze the coolant hose where ever I could reach them. I flush the radiator with distilled water...
I fill the radiator up with new coolant and run the engine with the radiator cap off..
then just watch the coolant level go down into the fill hose, refill radiator to top, put cap back on, go for a few mile ride until fan kicks in and ride home..
Wait for 15 minutes or so and open radiator cap to check/refill coolant level in radiator, then fill up the reserve tank to proper level.
I only remove the battery cover to get to the radiator cap, no other body panels.
I never removed any coolant hose to check for air.
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Post by allworld on Jul 16, 2008 7:58:20 GMT -5
Hello wxguru:
I feel your frustration, what I have found to work is keep the cap on the overflow bottle, and I put the cap on tight to the radiator fill ran the engine till it heated up (about 3/4) shut the engine down CAREFULLY remove the radiator cap, then run engine with cap off. repeat this process till at one point the fan kicks on (cap on tight) It is important to top off the radiator each time.
Once you get everything working ( and you will ) then fill the overflow bottle to the proper level.
Good luck and keep us posted.
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Post by glassvial on Jul 16, 2008 9:00:05 GMT -5
Have you (or anybody else) tried to back-fill the coolant system from this hose, the one above the "drain" shown in this picture:  I know GM's are terrible for bleeding the cooling system (hence many drill a small hole in the t-stat) so another thing that helps is filling the cooling system from someplace other than the obvious, like under the radiator cap area. Back-fill the system from someplace else with 100% coolant, which pushes the remaining water/air out (coolant is "heavier" than water). |
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Post by scootervirgin on Jul 16, 2008 9:58:05 GMT -5
Im just wondering the trick in getting that dang overflow cap all the way on. Its a b*tch!! I can usually get it installed to the first ring but its too hard and too tight to get past that ist ring on the cap.
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Post by luckeydawg on Jul 16, 2008 10:54:16 GMT -5
1st ring is all ya need, and to get the coolant in I squeezed the hose going back to hte water pump, kinda like a syphon pump action, took a few mins but it worked, it sucks it thru and pushes it though water pump and thru system...keep overflow cap on and rad cap off and fill as it sucks it thru....
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Post by jim63 on Jul 16, 2008 11:10:23 GMT -5
I feel for you wxguru, I had same experience with my 1st flush. Bike was running good, drained via bottom bolt on water pump refilled, via radiator cap under the seat, tried to let it burp awhile. Then bike ran hot, full hot after awhile. I went so far to check water pump and thermostat for blockage was so frustrated you wouldnt believe it. And like you the overflow tank filled to overflowing. After letting it run abit and almost overheating I walked away a few minutes (to cool off, I was smoking hot from frustration). Radiator cap felt cool so I was going to check levels again and whoosh blew out alot of fluid all over me. Refilled and it works now, had to reseal the thermostat had a small leak. I think I will pass on cooling system for awhile, was not an enjoyable system. My wifes scooter 150cc, is mercifully air cooled lol.
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Post by yarddogbbq on Jul 16, 2008 12:51:45 GMT -5
if you can find the temp sensor for gauge, remove it and fill radiator till fluid comes out of hole.
this should get fluid near tstat. start engine and finish filling while running.
yarddog.
what town in ar do you live.??
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Post by wxguru on Jul 16, 2008 16:45:46 GMT -5
YYYYYYEEEEEEEPPPPPPPEEEEEEEE!  Well, I did the method of rocking the scoot back and forth almost all the way over....and then back on the stand. Fired it up, and it started to burp burp burp! Once it got good and warm, it was burping consistently, then I heard the MAGICAL sound....the fan kicked on! Only one question remaining. How full does it need to be inside the radiator fill cap area? When I fill it, it promptly goes to the overflow and levels off down low. but it is running cool. THANK YOU TO EVERYONE FOR ALL THE HELP AND CONCERN. THAT IS WHAT MAKES THIS BOARD SO GREAT! |
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Post by WarrenS on Jul 16, 2008 19:44:53 GMT -5
What little air is left in the radiator should work its way out through a couple of heat\cool cycles.
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Post by r0b on Jul 16, 2008 19:46:56 GMT -5
I just pulled the water line off the top of my carb until water/coolat squirted out, I think it might have burped once after that. Gauge stays at mid level, fan cycles on all the time no problems at all.
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Post by my first scoot on Jul 16, 2008 21:52:09 GMT -5
that worked for me also r0b, pulling the top hose off. I can almost swear by it. I did it twice. I changed the radiator fluid a few times in my scoot. Once while I was trying to get the fan to kick on I gave a good ol thump on the right side of the panel where the rad is on and the fan kicked on. Coincidence, who knows.
Glad to hear you are now operational wxguru.
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Post by yarddogbbq on Jul 17, 2008 11:55:55 GMT -5
, good job tell hydrogen tecnology how to do for his white rde
yarddog
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Post by drhat on Jul 24, 2008 8:22:44 GMT -5
I just pulled the water line off the top of my carb until water/coolat squirted out, . . . .... could someone please post a pic of this hose . i have got air in the system and it will NOT burp ! there has got to be a trick to getting the air out . signed a very frustrated scootdawg  |
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Post by wxguru on Jul 24, 2008 9:27:28 GMT -5
drhat, have you got the cfmoto carb design, or the linhai design? That will make a difference.
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Post by drhat on Jul 24, 2008 9:49:22 GMT -5
its the 257cc Linhai .
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Post by wxguru on Jul 24, 2008 9:51:05 GMT -5
Some of the 257CC Linhai's are coming with the CFMOTO carb....which is what is on my Linhai scoot (build June 2008). You might post a pic....somewhere earlwb has posted a pic of atleast one of the carbs...I will see if I can hunt it down.
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Post by wxguru on Jul 24, 2008 10:03:40 GMT -5
drhat...do you have this carb? If so, you have the cfmoto..which has been modified somehow to fit on the Linhai engine....mine is the same way. you will see the water hose in this pic: x1scooters.com/images/pdi/carb.jpg |
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Post by yarddogbbq on Jul 24, 2008 11:49:20 GMT -5
drhat,
you guys with the linhai style engines, can take the temp gauge sensor near the right side of intake manifold and thermostat take the sensor out and let coolant flow out of hole, put it back in and finish filling the radiator and over flow.
another thing if i have heard correctly, the linhai style engine does not flow coolant thru carb is that correct?? (or you could pull coolant hose from carb to let air out)
if your carb does not flow coolant, i predict you guys will have icing problems when a cool humid day comes and stalling will occur or on a cold high humid day. i will be surprised it they dont. most modern carbs flow coolant to prevent icing. (no concern now!!!ha!)
since they have put a keihin on your scoots i would try to route coolant thru them later when it gets cool and an almost rainy day comes. my bali runs great with the coolant hooked to carb. and adjustment is easy no fluctuation. hard to believe no coolant flows thru your keihins.
(they have coolant hookups dont they??)
but it is summer and no icing is here now, (cool rainy day might cause some stalling.)
coolant also helps cool the carb from heat conduction from engine mainifold. and cools the end of manifold a little.
just wondering the idea behind that, maybe heat conduction from engine to warm carb (it will i promise hopefully not heat too hot making adjustment harder/ low idle when cool, high idle when hot, vapor lock in summer, things like that.
(an electric fuel pump will help prevent vapor lock tho)
back on subject,
remove the temp sensor near thermostat fill radiator, and allow coolant to come out of sensor hole, this will put coolant near thermostat allowing it to open when warmed up. finish filling up.
yarddog
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Post by cabanaman on Jul 24, 2008 12:05:55 GMT -5
When I changed mine during pdi I just filled the radiator then run the motor with the cap off and kept topping off the radiator after the fan came on till it wouldn't take anymore just like in any car I've done. That did it,I don't understand why so many have to go through such an ordeal?
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Post by drhat on Jul 24, 2008 20:27:59 GMT -5
ok here's the trick  i took the hose off the right side of the "intake manifold" ( the one right next to the temp gauge sensor ) added anti-freeze until it started to come out of that inlet . reattached the hose , added some anti-freeze and boom , outta here . no more air ! wohoo ! thanks guys ! especially you yarddog ! your idea got me to thinking and the hose was alot easier to remove than that sensor but it had the same effect . there , i contributed  somebody throw me a frickin' bone ;D lol |
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Post by wxguru on Jul 25, 2008 8:14:26 GMT -5
cabanaman....i was doing it that way until it started to violently slosh out of the fill area, and all over the motor. Why it was doing that I don't know, but it made a big mess, and smelled horrible.
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Post by yarddogbbq on Jul 25, 2008 11:06:41 GMT -5
thank you drhat appreciate it.
heat will absolutely kill these small engines quick.
he hose or sensor is a "cool" trick.
now for miles and miles.
yarddog
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Post by cabanaman on Jul 25, 2008 19:12:23 GMT -5
cabanaman....i was doing it that way until it started to violently slosh out of the fill area, and all over the motor. Why it was doing that I don't know, but it made a big mess, and smelled horrible. I don't know either unless it was reeeaaallyy burping.  |
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i took the hose off the right side of the "intake manifold" ( the one right next to the temp gauge sensor ) added anti-freeze until it started to come out of that inlet . reattached the hose , added some anti-freeze and boom , outta here . no more air ! wohoo ! 
somebody throw me a frickin' bone ;D lol