Total Frustration By damin69 (Read 1,057 times)

[damin69]

Man. I got this Jonway last year brand new. Seems like I have done NOTHING but work on this damn thing. First it was all the electrical. The the lower main bearing on the motor causing me to have to do a complete rebuild. With the rebuild getting a bum piston. Now since that rebuild I have been having issues with temps. So while doing some cooling upgrades today it has seem that the head gasket may be shot.

So going to get the system filled up an burpped start scooter up and work on getting it warmed up. So what happens it keeps pushing fluid back out the filler. I fill it up make sure coolant is all the way through expect it to suck coolant in and instead it just pushes it out the top. So that leads me to believe that I have a Head Gasket problem.

[JR]

Could also be a stuck thermostat. I would check that if it doesn't stop first.

JR

[damin69]

Jul 24, 2011 19:46:41 GMT -6 JR said:

Could also be a stuck thermostat. I would check that if it doesn't stop first.

JR

That was the first thing I tried. I have a new Thermostat on order already so I took the Stat apart to see if that would take care of it. That did not nothing to help. It was still pushing coolant out the filler.

[scooteraddict]

I hear you on you problems.

I just did something for my cooling system. I found that if the engine is the 257cc engine, then locate the hose that jumps from the t-stat to the other side of the cylinder. This is a small tube. After disconnecting one side, try filling it up.

Now as far as for the coolant coming back out, this will happen since it is heating up and expanding. best to let it happen and after a while (mind you did the step above), you will notice that air bubbles start to come to the filler at the point of when the fan turns on. After some time, turn off the bike, you will notice that the coolant will retract into the tubing.

Be patience and good luck

[cruiser]

Todd, reading about your newest gremlin brought to mind a compression leak-down tester that Rapid Jim had posted about. Now you don't have to get all the guages and fittings, but you might want to adapt a line to the spark plug hole and connect to an air compressor while the engine is at TDC so both valves are closed. Apply about 150 to 200 psi and see if any air bubbles come up through the radiator filler. I would think that this would show a compression leak from the combustion chamber into the water jacket.

Here's Rapid Jim's post:

.jr-richscooterdoc.com/Help_Build_your_own_compression_tester.pdf" rel="nofollow" target="_blank">.jr-richscooterdoc.com/Help_Build_your_own_compression_tester.pdf

[cptk]

By the way if you have ever had the resevoir off on one of these things you will notice that the outlet from the resevoir is extremely tiny. Not much fluid is going to flow there even if there is suction on it. The hose is plenty big. So anyhow I drilled it out just a tad to allow more flow from res.

I had the same issue a while back, puddle under the bike where it came out the res. after a long ride. Trust me on this there is not much fluid leaving your res. possibly only pressure coming back into it. That is why I changed fluid and did what I did. Not saying ther is not another underlying problem but you might try this first...Its cheap...And it has seemed to help my o'l Blu.