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Hi All.. I have a LightWing GR 582, have recently put a new Bluehead in, I feel it’s running a bit hot. Can anyone tell me what the running Temperature should be. Cheers!

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The manual says coolant temp min 65°C max 80°C for the blue head, CHT 150°C at the spark plug seat.

My thruster blue head with the tall radiators sits on 65 always, the old grey head with short radiators would get up to 85 on a really hot day at climb power.

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Make sure you aren't losing coolant. The rubber in the cap should seal well enough for all the expanded coolant to return. The usual fix for hot running is a larger radiator with those motors. Nev

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The manual says coolant temp min 65°C max 80°C for the blue head, CHT 150°C at the spark plug seat.

My thruster blue head with the tall radiators sits on 65 always, the old grey head with short radiators would get up to 85 on a really hot day at climb power.

Thanks for the info Thruster 88, much appreciate!

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Make sure you aren't losing coolant. The rubber in the cap should seal well enough for all the expanded coolant to return. The usual fix for hot running is a larger radiator with those motors. Nev

Will definitely check that out, thanks facthunter!

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List what temp your gauge is showing say at end of climb and general cruise. Then people can comment further.

Thanks Blueadventures for the tip, will keep a record next time I’m up!

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Try to bleed all air from the system. It will cause issues (hotspots) If your radiator capacity is marginal the ambient temp will cause a quick effect. Are they completely clean in the core? High % glycol will not cool (Take heat away) as well as pure water does. Nev

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I believe Rotax upgraded the radiator cap to a higher blow off pressure at some point. (Should be written on the top)

Might be worth seeing what you have and if it's the right one.

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Try to bleed all air from the system. It will cause issues (hotspots) If your radiator capacity is marginal the ambient temp will cause a quick effect. Are they completely clean in the core? High % glycol will not cool (Take heat away) as well as pure water does. Nev

Thanks for that info, I will look at the coolant percentage!

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I believe Rotax upgraded the radiator cap to a higher blow off pressure at some point. (Should be written on the top)

Might be worth seeing what you have and if it's the right one.

That is a good point, bout to ring Bert Flood now to find out the correct poundage Etc.. Cheers

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