Gotta love these new-fangled doohickeys...

Refilled the cooling system in the Pig after treating it to new plugs and
air filter. Whaddafuggindrama! Pour a bit in, burp the system, move the bike
left and right to remove bubbles and airlocks, repeat ad nauseum...

Go for a ride, temperature lower than usual, everything fine, 10kms from
home suddenly temp needle shoots up, stops just under the red zone. Kept
going, pulled up at the lights a couple of kms from home, a K100 rider tells
me I'm pouring coolant from the overflow. Get home let bike cool down, pour
another 600mls of coolant into the radiator.

This morning I'll take the Pig out again for round 2...There's gotta be a
better way...

Doug Cox.
Work to ride, Ride to work...

 

Get someone else to do it. Works for me.

Aaron
ZX6R

 

I don't trust someone else.

And I've got plenty of coolant... : )

Doug Cox.
Work to ride, Ride to work...

 

Sounds like you might have had air trapped in the system. After you fill up
the coolant, if you leave the bike standing and idling with the filler cap
off, till you can see the thermostat is open and the coolant is circulating,
then just let it idle for another 10 mins or so topping up if necessary till
the level stops dropping. Works in my car.

Nev..
'02 CBR1100XX #2

 

Doug, one of the local guys here did his a while ago and had the same problem and
found after the event that his motor has a vent plug at the top of the motor for this
very reason, his however is a 595 motor, different to your 995 but it might be worth
looking anyway.

Doug.

 

The 595 and 955 are one and the same. I know about the bleed screw. Nothing
works though. I've fucked around with it all day and I'm about ready to
throw a for sale sign on the fuckin' thing.

No matter what I do to try and get the bloody airlock out nothing changes.
I've laid it over almost horizontal, massaged all the hoses to get the
bloody air out. I fill it till it's running out the bike's ears and 10kms
down the road the temperature takes off and the bike spews coolant out the
overflow. I've gone through more than 5 litres of coolant so far...

It's done nothing to change my view that water cooling is for cars.

Doug Cox.
Work to ride, Ride to work...

 

I trust someone else (West End MC's) more than I trust myself to not bollox
it up.

Aaron
ZX6R

 

"Nev.." wrote

Didn't work in my Fiat. Needed to pay an Italian to do it.

My daughter's VW Golf wouldn't either but I learnt how to do that one.
Needed to have the heater turned on to bleed the air from the system.

Theo

 

I've had problems with coolant being spat out of vehicles after I've over-filled the system. Water
heats up, expands and since it has no room for expansion, builds up pressure and blows out the
overflow.

Possibly part of the prob?

Dale Porter

 

Hard to **** it up. It's been hot so far but it's kept out of the red
zone...

I did ask Rising Sun to do it as part of the last major service, but they
didn't.

I'll drop in and have a word to Nev tomorrow anyway...

Doug Cox.
Work to ride, Ride to work...

 

The highest point of the cooling system on the Pig *is* the radiator cap...

So does the Pig. Trouble is, the air is trapped somewhere else (lower) in
the system.

Airlock causes hotspot, coolant turns to steam, Old Faithful if the cap is
off, big green spew underneath if it's on...(overflow from the catch tank
under the seat)...

Tried 'em all from t5.net.

Doug Cox.
Work to ride, Ride to work...

 

Water doesn't expand. It undergoes a change of state to steam thereby
increasing it's volume some 1800 times (from memory). Rather than too much
coolant, there's a deficiency in one or more areas occupied by air...

Doug Cox.
Work to ride, Ride to work...

 

A rose by any other name. ;-)

Dale Porter

 

What is different about a bike system than a car? The standard technique for
the car is turn the car on, pour in the water (or coolant) and leave running
with the cap off. As it heats up the water bubbles and burps until a point
where it has burped it self out, at which you then put the radiator cap back
on. Done this dozens of times without fail.

 

Well... it expands from .00001 to 99.99999 degrees, and then it undergoes a change of state to steam .....
Clem

 

Does it have a high point in the system with some sort of bleeder to let air
out of the system?

Al

"Go soothingly on the grease mud, as there lurks the skid demon. "

Remove *ME* before replying

 

Doug, after my last service I had a similar problem, apparently the mech
wasn't usually a Triumph guy... it seems the trick is you have to fill,
ride then burp/refill them. For some reason even running the motor to hot
then burping it isn't enough, maybe the vibration from the road helps get
the air out.

 

Tried revving the bike when filling?? - moves coolant around faster

Fill then leave overnight? - lets gravity do the work

Else cooling system is being pressurised from elsewhere ( Headgasket! )

Daron

 

Knobbo is almost right ... it contracts from 0°C to 4°C,
and then expands with a very small coeff. from 4°C up.

Coefficient is 0.00021/°C @ 20°C, apparently.
<http://www.lsbu.ac.uk/water/explan.html#expan>

So a litre of water at 20°C is going to be ummm about
15 ml bigger at 90°C.

Hey Doug, did you make sure the thermostat hasn't decided that
this day shall be its last? Can you get the damned thing out
anyway? I agree that watercooling is a car thing

-----sharks

 

That and the fact that water is supposed to expand at 4C then contract again, got me
stuffed, don't give a shit as the best thing water is for is to make cups of tea
with....

Doug.