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I removed radiator cap as per posts (thanks all) It pushed fluid out

a couple times. I'm reading 4 bars temp and the fan cycles.

Seems to be hot to me but I wouldn't know since this is my first

1986 aspy I've never ridden.

Are the valve covers supposed to get too hot to hold your hand on?



Vic
 

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Those engines get REALLY hot to the touch. The valve covers are in alot of heat from the head (oil, water) not to mention they are close to the exhaust headers. I am not sure exactly what the temp is down there but I will bet in the summer it is at least 180 degrees and that is too hot too hold your hand on.
 

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If your reading 4 bars and the fan cycles then your sending unit probably is not working as it should.
The Aspy should read 8 when the fan turns on if it goes to the 9th, switch the engine off and investigate :)
If the fan cycles on and off then the system is working.

Yes they get hot.

I have an after market sender and temperature gauge, the engine runs about 190+ when riding on the highway, in town will hit 210+ then the fan comes on and it will cycle on and off till I am on the open road again.
 

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Thanks guys, I forgot I had a heat sensor gun. It seems to agree with what you all say. I may just burp her again since it blew more anti with the cap back on. I can see the flow while its running so I know the thermostat is open an pump is working.



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I follow the Honda manual for filling the rad, have done it like that innumerable times.

Fill rad,with 50/50 Start engine with rad cap OFF run until there are no bubbles in the coolant and the coolant level stabilizes.
Stop engine, fill rad to correct level, replace rad cap. fill the reserve tank and fill to correct level if low.

Check for leaks.

If you are getting lots of bubbles in the coolant then you could have a head gasket failure.
 

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If the level of coolant rises up quite a bit in the neck of the radiator when you rev the engine that can be a sign of a partially blocked radiator. With an IR thermometer you can look for cold spots on the radiator. Blockages or heavy scaling shows up pretty well with one of those handy tools.
 
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