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coolant troubles!

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fra-zzr
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Joined: 24 Aug 2006
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PostPosted: 17:05 - 31 Mar 2009    Post subject: coolant troubles! Reply with quote

was out for a ride today, bit of a hoon nothing insane, the oil temp never got anywhere near the red nor did the fan come on. Then when i stopped and got off at home about a 1/3rd of a pint of coolant came out the overflow pipe above the number plate Sick

sooo, what are my options?
is this a headgasket issue?

any advice would be greatly appreciated, thanks

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finpos
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PostPosted: 17:32 - 31 Mar 2009    Post subject: Reply with quote

May just be overfilled, in which case it will tend to spit when you stop the engine because as the fluid stops circulating the stuff near the hot bits boils and forces the rest out. So it's usually fine for a minute or so after you get off, then it pours out.

With a busted head gasket, it tends to dribble out constantly, so you get home, a couple of drops come out straight away but the bottle is already mysteriously empty.

f.
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fra-zzr
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PostPosted: 18:20 - 31 Mar 2009    Post subject: Reply with quote

just read a similar thread, looks like i'll just have to top it up, watch it carefully and hope for the best

Thanks
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lonner
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PostPosted: 20:05 - 31 Mar 2009    Post subject: Reply with quote

hi

i would check the fan is working as this is a clasic fan not working so the bike boils over when you stop.

may be over filled but fan most likely Thumbs Up hth

check the fan turns as they rust over winter and then jam and this blows the fuse Thumbs Up
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fra-zzr
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PostPosted: 20:19 - 31 Mar 2009    Post subject: Reply with quote

bike was used throught winter, fan was working a week ago, but like i said it didnt come on today.

Best way to check would be to refill coolant then leave at idle untill fan either comes on/coolant overflows?
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ms51ves3
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Joined: 07 Jun 2007
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PostPosted: 20:58 - 31 Mar 2009    Post subject: Reply with quote

fraser.h.cameron wrote:
Best way to check would be to refill coolant then leave at idle untill fan either comes on/coolant overflows?


It probably won't overflow until you turn the engine off and the coolant isn't pressurised because under pressure the boiling point is higher.

Best thing to do would be to run the engine while keeping a check on the temperature gauge. I'd be turning it off as soon as it gets into the red.
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finpos
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PostPosted: 22:37 - 31 Mar 2009    Post subject: Reply with quote

ms51ves3 wrote:

It probably won't overflow until you turn the engine off and the coolant isn't pressurised because under pressure the boiling point is higher.


Not entirely right, the pump is only circulating the fluid, the pressure is generated by the hot water trying to expand within the fixed volume of the cooling system behind the pressure cap. This would be why it says "do not remove while hot" on the cap. The reason engines with marginal cooling spill coolant when they are turned off is in my other post Smile

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