High Temperatures Issues

[agilebda]

Hello .

My scoot heated up on the 3rd temperature bar. Luckily I was 30 seconds away from home.
Diagnosed everything and my fan wouldn't kick in. Circulating pump is okay. I swapped the switch on the radiator, swapped relay and still no fan kick in.
I rigged two wired leading from the fan to the battery just to test it out and the fan is fine. Seems like an electrical communication breakdown somewhere.
What are your thoughts?

[kneeslider]

Did you check all the wire connections from the fan to the fuse box?

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[CROSSBOLT]

There may be an EMI (Electro Magnetic Interferance) filter in the line as well as the wiring that kneeslider refers.

Karl

[agilebda]

Did you check all the wire connections from the fan to the fuse box?

I will do just that. Will do a continuity check on the wires. Thanks. I checked wiring and looks fine by eye. Is there another fuse other than the main fuses by the battery?
Actually this is a GTI 300. I posted in here cause the DT forum seems to be more active.

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[agilebda]

There may be an EMI (Electro Magnetic Interferance) filter in the line as well as the wiring that kneeslider refers.

Karl, thanks so much. Great to see you online. This is actually for my GTI 300. (Non ABS version)

Is this EMI located in the harness somewhere?

Karl

[CROSSBOLT]

I would not think the EMI filter would be present in a non-ABS bike. I am guessing it would be near the fan motor or at least up front.

Karl

[agilebda]

Hi karl. I don't see anything EMI filter on the schematic or on the bike.

Tell me something.......is that switch on the radiator activated by warm coolant which flows past that switch in turn tells the fan to kick in? Could it be my thermostat itself?

[CROSSBOLT]

That's the switch, the one in the radiator. Normally open until coolant gets to a certain temp then closes turning fan on.

Karl

[agilebda]

Thanks Karl. This it it. I will swap and let you know how I make out. I see that the fan is also plugged into a relay as well.

[Tromper]

Possibly low coolant, an air bubble or corrosion in the system.
While you have it apart descaling isn't a bad idea.

Of course it could be more prosaic like a corrected connection in the harness.  Had that issue with my burgman.  Annoying to find but not too tough to fix.

[agilebda]

Well Karl.....as suspected, here's my problem.
Head gasket leak. Bad leak too. Good thing I didn't run the bike too much longer.

What parts do you recommend for me to purchase? Just a head gasket? Might as well make a huge order? Still have to find the fan situation. I will purchase a new fan switch in addition.
What website do you recommend for ordering?

[Stig / Major Tom]

Well Karl.....as suspected, here's my problem.
Head gasket leak. Bad leak too. Good thing I didn't run the bike too much longer.

What parts do you recommend for me to purchase? Just a head gasket? Might as well make a huge order? Still have to find the fan situation. I will purchase a new fan switch in addition.
What website do you recommend for ordering?

No help here - but that is a really well done video - well shot, with good lighting  and good focus. Horrible sight to see, though!
How many miles on your 300?

Stig

[agilebda]

Hi stig.

Awesome HD video if I must say so myself. I have 39,000 on my odo.

[CROSSBOLT]

I agree with Stig on your video! Parts required? We know one each head gasket. Drain the green stuff, get the head off and look at everything. Try to have the cylinder stay put when the head is off then you won't have to buy a cylinder base gasket. Then decide what you need. As long as it was running fine when this heating thing started you SHOULD NOT need too much. Take pictures of stuff you are not sure of and post 'em. Then maybe we can make recommendations.

Karl

[agilebda]

Thanks guys. Yeah she was running fine. I ordered: cylinder and head gasket, impeller pump and gaskets, impeller shaft and seals, therm switch, thermostat, oil filters.
I'm being in the safe side. Thanks guys and I will post pics of my mechanical work.