Hot water comes out after running for a while, presumably when thermostat opens. Can put hand under it without burning and can put hand on cylinder heads for a few seconds without burning.<br /><br />Is there a bypass that should have water coming out from start up?<br /><br />Also how much water should come out at idle? Not a thick stream from approx 1 inch diameter outlet.<br /><br />Just wondering whether I've got a problem that needs attention.