Cooling System Issue - Urgent

[UrbanRacer]

Hi folks, need a bit of help with my bike and i need it fast as i'm trading it in at the weekend. One of the dealers mechanics will be giving it an apraisal and will spot this.

the bike is a Suzuki GSXR 600 K4
here are a few things that may help with the diagnosis

the bike is not over heating (never goes above 105c)
their is no water that i can see dripping from where it shouldn't
their is no steam coming from it,
the fan kicks in at the right tempreture (102c)

So here is what happens, when the bike is at a standstill say in heavy traffic that i cannot filter through the temp will rise like normal, however when the temp gets to around 90c the water in the expansion bottle starts to rise and by the time it hits 100c the coolant is emtying itself out of the overflow tube on the expansion bottle.
I thought it was the Thermostat so i ordered a brand new one and i fitted it tonight, but the problem is still here.

any ideas folks?

[MidnighToker]

this might be a stupid question -and if it is, then feel free to laugh at me and just see this post as a bump, but...

Could you not just be over-filling it?

[Timmeh]

[lukamon]

cant you just move the hose so it points upwards?
____________________
killa wrote: Im an ass man myself

[G]

Most bikes are filled to the top of the radiator, I believe.

Wondering if the radiator cap is working properly? This is the bit that 'releases' the pressure to the expansion bottle usually.

After that, maybe it could do with the coolant renewing?

[UrbanRacer]

the coolant levels are fine and i put fresh coolant in tonight, i will order a new rad cap tomorrow and pray that its that simple

much obliged for your input

[iooi]

Water pump starting to give out, head gasket on its wayout....

Removing stat would help to stop it soing it, but would cause a longer warm up time.
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Just because my bike was A DIVVY, does not mean i am......

[UrbanRacer]

[BanditsHigh]

^^^ Correct .. it'd be a nasty mix if either oil or exhaust gases were getting into the water.

Didn't your bike have a lot of problems at a certain dealer not long ago ... have they fitted the hoses from the cooler to the overflow bottle back on the right way?

I only say, because I've just rebuild a Vmax engine for a mate not that long ago, and I (or my mate) connected the two pipes leading to/from the overflow the wrong way round ... this led to the overflow bottle being pressurised when the engine heats up, pushing water out of the bottle and on to the road ... sounds like this may be the problem with yours.

All the best ... Barry

[UrbanRacer]

thanks, i have a copy of the workshop manual so i'll have a look and make sure its all connected up properly

[stinkwheel]

[UrbanRacer]

I bled the cooling system again but it hasn't made any difference so i've bought a Rad Cap from ebay, hopefully it will arrive monday or tuesday and it will solve the problem.

i'll post the outcome

[Gpz 900R]

Without wanting to sound patronising you said you have bled the system, i would double check as a lot of bikes have 2 bleed points for the cooling system, another option would be to fit a manual overide switch for the fan this would mean you can ensure the fan is operating when you see the temp starting to rise.

[Paddy Blake]

Have you checked if the front of the rad is blocked so the air can't get in
to cool it down.Or the fins could be bent and doing the same thing.

Paddy.

[Pete.]

Couple of things with Suzukis:

The fan switches are prone to failing, perhaps the fan is coming on too late or not at all. If not at all check the fuse.

It's common to get an air-pocket in the cooling system when filling up, which would cause the water to boil inside and increase the pressure. When you fill the bike set it running thengo round squeezing the hoses to try to "burp" out any trapped air.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[UrbanRacer]

their is definetly no air in the syetem, i squeezed the hoses and had the bike over on its side several times

[UrbanRacer]

I got a Radiator Cap from ebay for £8 and It solved the problem.

Thanks for your input guys

[bugsy46]

I cant believe G was the only one that solved this!!!!!! Lower pressure lower boiling point!!??? What happens when you boil water up mount everest?
____________________
Laura - "And where did looks come into this and bugsy leave steven alone. You are not gods gift to women you may think you are but you're not."
Keith - "All the best"

[LeeR]

[Paddy Blake]

[Pete.]