Hi Medic. There are installation instructions for it here, on Five Star Manufacturing's web site. It's straight thermosiphon, no pump involved.
As far as the actual installation, if I were installing it on my vehicle I would probably plumb the "Y" fitting into the heater line returning the water from the heater core on the basis that it would then put the heated water into the block, warming it up and assisting in cold-starting the engine. Also, that would give the best odds of avoiding the thermostat in the vehicle and would prevent the hot water from getting trapped behind a vacuum-controlled water valve or something similar. I would also make sure I had the thing perfectly vertical as that would present the best chance for it to work the way it's supposed to.
Monday, December 10th, 2012 AT 2:34 AM