Rocketa Mc-54-250 overheat By jmicester (Read 931 times)

[jmicester]

Hello Folks!

Long story short, so I finally go the scooter to start a few days ago. There was no coolant in the system, so Today I put some in and turned on the scoot, let it run for a few minutes and noticed that the engine temp gauge was all the up. I looked under the scooter to see if there were any coolant leaks and there were none. Then I noticed that the radiator fan was not on. What would cause the fan not to turn on?? What else could make my scoot overheat? Any input is greatly appreciated!
Thanks!

Update:
Today I turned on the scooter again and in addition to the fan not turning on the radiator is cool to the touch. That would imply that the coolant is not circulating correct? If so, would that mean that the water pump is bad? How do go upon see if that is indeed the issue? Also I did not "burp" it, I am not sure the process of that.

[jmicester]

So I filled the scooter up with fluid and tried to "burp it" by reving the motor periodically and refilling the coolant. Shortly after I went for a ride and noticed while stopped the engine temp gauge rises, but as soon as I hit the throttle the gauge goes all the way down to cold. Does anyone know what could cause this issue???

[cyborg]

Could be a partial radiator clog,,there was a rash of that on this and other boards about two-three years ago,,,the coolant some factories ran gelled and caused stoppages in the radiator,,the symptoms you described sound almost exactly like those that were discussed then,,,flush the system and refill,,,that should handle it

[jmicester]

Ok great I will try that later today! Would that block in the radiator also be why the radiator fan us not coming on?

[jmicester]

So I'm completely lost and baffled. I tried to fix my overheat and radiator fan issue again today and now I'm completely lost. I had the radiator cap off and engine idling to try to get any last air bubbles out. While doing this, engine temperature reads cold but the coolant would boil causing it to overflow and get onto the engine. Does anyone know what could cause this issue??

[cyborg]

Yea there's a blockage ,,,the coolant isn't passing by the temp gauge or the switch for the fans,,,pull the radiator and the thermostat flush/clean install,,,fill with juice ,,,,ride

[kz1000st]

What shape is the thermostat in? If it's not opening and the fan sensor is on the radiator water won't reach the radiator.

[jmicester]

I will unbolt the radiator and thermostat and clean it out today. I will report back my findings. Also I ordered a new thermostat and radiator fan switch. It should be here by Friday.

[jmicester]

My new thermostat and fan switch came today! I installed them both. I Unbolted the water pump housing and there was a major blockage!!! I unclogged it and reassembled everything.In addition, I flushed the radiator and whole system multiple times until the water was clear. Unfortunately, the water and coolant keeps boiling up out of the radiator cup while bike is idling. Also the engine temp still reads C while the radiator fan still does not turn on.

Where do I go from here? What else could be the issue?? Perhaps a blown head gasket?? What are those symptons?? I'm baffled

[jmicester]

I bought a radiator. Hopefully that will solve my issue. I will report back after it arrives and I install.

[cyborg]

Sorry been gone on vacation ,,year the coolant those idiots at the factory use gels and creates all kinds of problems,,,the new rad will do the trick

[jmicester]

They sent me the wrong radiator So I am waiting now till I get the correct one.

[cyborg]

We're surrounded by morons,,,got a incorrect air filter just 2 days ago,,,maddening

[jmicester]

So I installed the radiator, new thermostat and temperature sensor. The good news is the radiator fan does go on now. But the bad news is the temperature gauge does not move. It's still reads cold. Could u have a faulty temp sensor???

[jmicester]

So I tried the old temp sensor and still my temp gauge is the same. The gauge moves a little bit, but generally hovers Round the C on the gauge. What could it be? Faulty gauge? Cylinder temperature sensor? How do I check those?