I have another Gas Heater Question to add to this thread. The gas heater (BN2) I installed in my beetle doesn't seem to put out much heat at all. It also has troubles lighting up or staying lit on days where the temperature is around or below 0deg C. It doesn't seem to have an cracks in the combustion chamber, glow plug gets mighty hot, fans running, and you can hear the pump clicking away. I've opened the stroke up a little bit it seems to put out marginally more heat. I'd expect it to put out ALOT more heat than it does for the gas it consumes. Help?