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Post by robert1c on Nov 26, 2012 17:36:22 GMT -6
I have been tryin gto follow the burping instructions but still having issues.
I fill the radiator and the overflow tank is almost empty. with the radiator cap replaced i start the bike and watch the temp gauge go up tp "H" and the over flow tank fills up. turn off the scoot let it cool, open the radiator and its low. top it off, replace the cap adn start the scoot. watch the temp go to "H" and the overflow bottle is now full.the fan is not comming on.
the temp at the thermostat is 180+ and at the temp sensor its 180+ the radiator is getting to 92+.
what temp should the fan switch comeon at?
what am i doing wrong in the above?
thank you guys for your help.
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Post by JR on Nov 26, 2012 20:18:06 GMT -6
Robert here is the burping instructions: thescooterprofessor.proboards.com/index.cgi?board=cool&action=display&thread=24You should leave the cap off, start the scooter, let it run with the cap off until the level goes down then fill with it still running, immediatley put the cap on then fill the reservoir tank to 3/4 full. Once the temp goes up kill it and then let it sit until bone cold, repeat if necessary, even take it for a spin around the block and repeat. The fan should come on at around 167F. JR |
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Post by robert1c on Nov 27, 2012 18:29:22 GMT -6
Hi JR, I got to work om it again today. open it up and the fluid is low at the radiator fillcap. the resevoir is all the way full (still from yesterday). Where are you measuring 167F at? thermostat, temp sensor or at the fan switch at the bottom of the radiator?
i topped off the radiator and ran it with the cap off. at around half way up on the temp gauge it burped pretty good. i repeated this once more and then it stopped burping. the temp went to H and i shut if off and let it rest for about 1hr. went back out and it was cool. its in the 50's here in Houston tonight. topped it off again and started it. it burped very little this time. the temp went up to H again and i shut off. i havent ran it with the cap on yet today. i will let it rest once more and then go back out and
1) top it off if necessary
2) run it till it burps and then top it off
3) replace the cap immediatley
4) pray for the fan to come on.
Thank you very much for the guidance.
I know i owe you guys an outcome on my cluth issue... i did get that one fixed.
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Post by jburd on Nov 28, 2012 15:20:04 GMT -6
I have a 250A and just had to change my water pump a couple days ago and burped it successfully. Not sure how different the 250A and 250B are. JR's instructions worked great for me. Mine really didn't burp at all while running it. The key to JR's instructions seems to be in making sure the engine is stone cold. Being just cool didn't work well. I tried topping it off with coolant and "burping" it after it had cooled down and it didn't work. On mine I literally waited until the next morning when it was stone cold. When I opened up the radiator I topped it off and replaced the radiator cap, it started right up and the fan kicked on.
In my experience you can't rush the cooling down part. You have to make sure the entire engine is a stone cold not just the radiator. All of the air in that process should work its way to the top. JR has mentioned in other posts that the temperature switch won't work with even the slighted amount of air in there. I tend to agree.
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Post by robert1c on Nov 28, 2012 15:36:28 GMT -6
I would have to agree with you guys. i tried it a few times yesterday with little burps but still no fan and the over flow is full. i just refilled it at burped it again (big burp this time) but still no fan. once i shut off though there is a burping noise comming from the hose. not sure what thats about. gonna wait till later to see if i can get one more time.
thanks for hanging in there with me.
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Post by JR on Nov 28, 2012 19:06:27 GMT -6
Robert do remember that as soon as she burps with the cap off and engine running refill the radiator and immediately put the cap back on. Check the reservoir tank and fill it at about 1/2 to 3/4 full.
After running for a few minutes if she gets hot shut her down and let her get bone cold.
The 167F is the range at what the thermoswitch on the radiator closes to complete the circuit and turn on the fan. If any air is in the system the fan generally wiil not come on.
JR
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Post by robert1c on Nov 29, 2012 18:49:59 GMT -6
Hi JR,
I am now on day 4 of this burping business and still no fan. i nelieve im doing everything correctly. i did jump the fan switch and it comes on then.
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Post by JR on Nov 30, 2012 8:47:51 GMT -6
Ok then if this is the case then we've got to find out if the thermostat is stuck closed or just like the other poster said we have a malfunctioning water pump.
I would remove the thermostat and do the old boiling water on the stove test to see if it's good because this may be the problem. Is it still getting hot quickly?
Good job on testing the fan.
JR
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Post by jburd on Nov 30, 2012 11:34:04 GMT -6
I had to replace a water pump when I had the same situation. I burped it several times with no luck. I also jumped the fan and it was fine. One thing I noticed is that before the water pump was replaced it got hot really fast. Now that I have the water pump replaced it takes longer to get up to half way where the fan kicks on. Logic says that would be the case because the fluid is actually circulating. One way to confirm it (once you test the thermostat as JR recommended) is pull the outer cover off of the water pump (remove the 3 allan head bolts) and start the scooter. The impeller should be spinning. If it is not, it probably is your water pump.
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Post by robert1c on Nov 30, 2012 16:08:45 GMT -6
hi guys back at it. the thermostat is new. i replaced it and the water pump back in Aug-2012. but i just bought some PEEk flush and when i pulled the drain plag NOTHING came out. i tried to pressure it with water form the radiator cap and it would not flow. i then blew air into the drain hole and water just spewed like a volcano from the radiator cap. i then ran water into the cap and out it comes from the drain. i also pulled the two top hoses of the radiator and ran water into the radiator and into the hoses in attempt to flush the system. i then filled the radiator with PEEK and let it run until "H".
im thinking let it sit and run it and burp it with PEEK again. then flush and fill with antifreeze again and see what i get.
where does the lower hose go.
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Post by JR on Nov 30, 2012 16:50:12 GMT -6
Robert these are aluminum and radiators and the manual for the linhai specifically says no corrosive fluids in the system. I highly recommend you flush this system extensively with water sevaral times and by several times I mean fill it let it run, flush, fill it and let it run until you have very clean clear water.
Also flushes will harm the thermostat at times too. One last question and I'm sincerely not being smart here, are you sure you put the thermostat in the right way? If it's upside down then no flow and it happenes to the best of us.
JR
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Post by robert1c on Nov 30, 2012 17:07:46 GMT -6
HAHAHAH!!! OK first let me address the upside thermostat. yes its the right way(pin part up) and ive actually been running it with the new thermostat since Aug with no issues until last week. its funny because when i was 16 i did put one in upsidedown in a truck.
ok ill go drain and flush out the PEEK now. i wanted to pull the lower hose and a top hose and flush the radiator anyway just to be sure.
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Post by robert1c on Dec 1, 2012 17:20:31 GMT -6
Hi JR, ok I flushed out the flush and burped it last night. Then just now once I got home I topped off the radiator and drained the overflow then stated it up and ran it. It burped very little this time but the water at the neck fluctuates kind of forcefully. Not sure if that's an issue. I replaced the cap and let the temp rise to "H".
I think the next step is to pull thermostat. I'm at a lost any guidance would be helpfull.
Thanks all
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Post by JR on Dec 1, 2012 20:14:33 GMT -6
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Post by robert1c on Dec 2, 2012 8:39:32 GMT -6
HI JR, I tested the thermostat this AM and it opened as desired. i also sightly opened the drain plag of the water pump and let a little water drain just to make sure it wasnt clogged.
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