Here's a new one.
Mate has a GQ with LPG, last few weeks, after a long trip, the coolant fills the overflow bottle and leaves air in the top of the radiator. When the radiator cools it doesn't draw the coolant back in. When you open the radiator it lets out air under pressure and is low on water. Had it checked out by radiator place, found all to be well. Last trip we took both our GQ's just in case, sure enough it did it again. When I opened the radiator cap I got a distinct smell of LPG, mate couldn't smell it. Seems to me the gas mixer is leaking LPG into the coolant andforcing the coolant into the overflow bottle, is this possible?