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Post by jburd on Mar 12, 2014 7:59:08 GMT -6
So here's the latest. I flushed the cooling system with a water and vinegar solution. When I first started flushing it, I left the radiator cap off to watch what it was doing. Whenever I revved the engine, the fluid would rise and backflow into the reservoir. I left the cap off and kept adding the water and vinegar solution. After awhile it started to flow better and I could rev the engine without it flowing backwards. Also the fan was kicking on and off which was a good thing to me. I completely drained the water and vinegar solution and replaced with coolant. I'm now working on the burping process. I have done it once and need to do it again. I'm hoping that I will have this corrected.
I am still a little concerned because I have read on other forums that a blown head gasket will cause the same symptoms. The flowing backwards is from pressure in the block leaking back into the coolant system. I checked the oil and don't see any evidences of water in the oil. I didn't see any oil per se in the coolant either so I'm not sure if I have the same problem or not. I did see some black specks (junk) in the coolant when I flushed it but was thinking that could have been build up that blocking the flow. It runs fine other than it has been running hot and back flowing into the reservoir. We shall see what happens when I finish burping it. If anyone has any other suggestions, let me know.
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overheating
by: jburd - Mar 11, 2014 6:43:18 GMT -6
via mobile
Post by jburd on Mar 11, 2014 6:43:18 GMT -6
Good to know. Thanks. I will give that a try.
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Post by jburd on Mar 10, 2014 6:09:41 GMT -6
I am in the same situation. Mine is actually blowing out fluid out the overflow tank. The only difference is that once mine blows out the fluid then the fan doesn't kick on because there is now air in the system. I'm thinking about taking a look at the water pump. My thought was maybe it's not working properly and circulating the water well enough. Sorry I'm not much help. I'm waiting for JR to log on and chime in. He's usually spot on when it comes to the cooling system.
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Post by jburd on Mar 9, 2014 17:05:25 GMT -6
I'm kind of stumped here so thought I would throw it out there to see if anyone has experienced the same thing. My 2007 Linhai MP250A is mysteriously overheating and I'm not sure why. I have had some issues with it in the past but have always figured it out. It looked like I had blown a hose so I took everything apart and replaced all of the hoses just to make sure. I refilled it with fluid and burped it. During that process, I discovered that when it was hot, fluid was pushing back to the reserve tank and out what looked to be an overflow spout on the back and top of the overflow tank. I just wrote it up as I had too much fluid in the overflow tank. I went ahead and finished the burping process successfully and the fan kicked on. I thought I was all set and put it back together. I took it out for a ride and I ended up blowing more fluid back up out the overflow tank and now the radiator system is low. Consequently the fan doesn't kick on like it should. I believe the thermostat is good since during the burping process it opened up to let the fluid flow. I changed the water pump about 2K miles ago. Does anyone have any other ideas?
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Post by jburd on Dec 9, 2012 17:21:42 GMT -6
I believe I am finished. I got it put back together and took it for a spin. Seems to run really good. Thanks for all the great tips. This forum is awesome. Maybe soon I won't have to ask so many questions and I can help others instead. I'm hoping I finally have everything fixed for awhile and can now keep it on the road.
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Post by jburd on Dec 9, 2012 15:07:45 GMT -6
So I finally made some headway. I took the carburetor off and found that the black knob is actually a cover. I took a pair of pliers and wiggled it back and forth until it came off. Found the screw underneath. I put the carburetor back on and then turned the screw all the way in. As Alleyoop suggested I turned the screw 2 1/2 turns out and tried to start it. I did hear a difference but still wouldn't start. I kept turning it a half turn at a time until it started right up. It's running smooth and the idle speed is down to about 2000 which is where it should have been. I'm going to let it run for a few minutes until it gets warm to make sure the mix is right with it warmed up. Then it's time to put it all back together.
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Post by jburd on Dec 9, 2012 8:04:03 GMT -6
JR - that's a great idea. I never thought of that. Ridecheap, I stripped a couple of mine out as well. I went to harbor freight and got a tap and die set for about $15 and retapped the holes. I know you can get an easy out (and a tap and die for that matter) at any auto parts store. With that said, JR's suggestion sounds the easiest.
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Post by jburd on Dec 9, 2012 7:58:48 GMT -6
Alleyoop, does the fuel ratio screw turn by hand or do I need to get some pliers on it? I can't get it to turn clockwise or counterclockwise.
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Post by jburd on Dec 9, 2012 7:50:59 GMT -6
Terrilee, the first time I did it, I'm not sure I was. It did run after that though. When I just redid it, I'm pretty sure I was. I hand turned the engine 3 times until I got both the line on the chain pulley and the line on the other side (next to the oil stick) perfectly lined up. Once I got both sides lined up, the gap on the exhaust side seemed too wide as there was a lot of play in it with the gap tool inserted. I adjusted it down a couple of turns.
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Post by jburd on Dec 8, 2012 20:32:17 GMT -6
Thanks alleyoop! The fuel ration screw didn't seem to want to turn at all. I will work on it more tomorrow and keep you posted. Thanks again for the advice.
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Post by jburd on Dec 8, 2012 19:26:32 GMT -6
Here's a pic from the other side. Attachments:
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Post by jburd on Dec 8, 2012 19:24:26 GMT -6
I'm not exactly sure which is the fuel ratio screw. Is it the the one alleyoop described above with black knob on it. It kind of looked like something like that on the bottom of mine but wasn't able to turn it. I wasn't real sure from the picture above. I have attached a picture of my carburetor. Can you point out which is the fuel ratio screw. Attachments:
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Post by jburd on Dec 8, 2012 17:59:58 GMT -6
I thought it might be the valves. I had adjusted them earlier but with it being my first time, thought I could have not quite gotten them right. It did seem to idle really high after adjusting them. I just checked them and did adjust the lower side a little. It did seem too loose. It didn't solve the problem but I think it will help in the long run. I did notice that if I hold the throttle open when trying to start, it cranks faster but just won't start. I will try the fuel ratio screw. I will keep you posted. Thanks for the help. Very much appreciated.  |
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Post by jburd on Dec 8, 2012 15:30:35 GMT -6
I haven't yet gotten it to start. I pulled the fuel line out of the carburetor and turned it over. Fuel pulses out of the tube so I am assuming my fuel pump is OK. I've looked at my fuel filter and it doesn't seem plugged. Any ideas? It will crank up at first then turns off and then just cranks. If I leave it set, then it will fire again but shut off immediately. I'm really getting frustrated with this thing. I'm feeling like I got a lemon. I hear great stories from others but I seriously can't keep this thing on the road. It's always something.
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Post by jburd on Nov 30, 2012 11:43:27 GMT -6
This morning it started fine but when I gave it gas it died. Then it wouldn't start at all. I haven't adjusted it yet. It acts like it wants to start but almost acts like it can't get enough fuel or the fuel air mixture isn't right. Any ideas?
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