bleeding systems !

[menostig]

Is this a design problem ? My 1.6k supersport has the expansion tank in the nose, cap brushing fibreglass, and yet I can see the hose upto the cockpit heater junction/tap is higher by a good 2 inches. It has a plastic bleed screw there which seems like an admission that it isn't an ideal system.

Road use has never revealed any problems at all with cooling or water level in the expansion tank. And when the car's hot or cold, if you cautiously undo that bleed screw you just get water, no bubbles. But I ended a track session when I saw water misting onto the windscreen and back in the pits found the expansion tank spitting water (no air left). Once cooled, there was no water in the heater hose under that bleed screw, just a lot of air. Easy enough to get rid of by blowing into the expansion tank until it fountains out the bleed screw, but did the air move to the highest point ?

Anyone had similar experience with the heater ? Tempted to remove it, but my brother likes it, the big pansy.

cheers
Roger

[casbar]

You obviously had air in the system. They are a pig to bleed, I fitted a bleed T in the same position as yours, it just makes it a logt easier to fill and bleed than without one. The air catches in the J hose on the side of the engine, this hose needs flexing when filling to get rid of the air.