Question about 2002 Yamaha YZ 426 F

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Coolant system my honda mbx 125 was overheating alot and i was wondering if my coolant system is not completely full to the top would that be the reson. i am sure it has somthing to do with my coolant not flowing properly. also would a tiny leak because you need pressure in it i think p.s. i checked my thermostat already

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Water leaks are not acceptable and neither are fans that don't come on before a overheat situation. Leak should be repaired and fan checked.

Posted on Jun 18, 2009


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Posted on Jan 02, 2017


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Found radiator leaking and topped up coolant reservoir. After short ride just before shutting down engine got an overheat warning, yet found sufficient coolant in reservoir. is there a check-valve or so in...

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Since you swapped out your cooling system, and I have to assume that you properly bled all the air out of the cooling system, and made sure that the engine and radiator are full of coolant, then your problem of overheating might be a head gasket leaking. It can let hot exhaust gases go right into teh coolant, and over heat your car.

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A common problem with overheating that get's overlooked, is a sticking thermostat. As inexpensive as it is, and as easy as it is to replace, I would strongly suggest replacing it. An overheated engine could be catastrophic and a huge expense. I hope your problem is resolved...

Aug 26, 2009 | 1994 Honda Passport

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