hello to all,<br />I have been having a overheating problem with this used engine.I have replaced Water pump,Head gaskets,T-stats,Poppet valve,plugs,exhaust chamber gasket,and flushed cooling jacket with air and High psi h20 to no avail.When I run the motor in a drum,in nuetral,and get a very good stream out of the telltale with the water temp around 130-145.I have also used a infrared temp gun to check the head temps and found that the port side(140-160) is around 20-30F hotter than the Strbd(120-140)?<br />I have syncronized the carbs,cleaned the carbs and adjusted the timing according to the specs.<br />My question is what could be making this motor run Hot?The temp gauge reads metal temp and stays around 160 -180 at an idle,BUT when put into gear the tell tale sputters and the temp rises.The poppet valve seems to be working correctly.<br /><br />Main Questions:<br />1.Does the poppet valve opening up interfere with the flow out of the T-stats,and if so why?<br />2.Why would the tell tale psi drop when the engine is put into gear?(water pump and components have been replaced,properly)..<br />3.Would old fuel cause overheating due to pre-ignition or detonation?<br /><br />Any and all comments will help,PLEASE BE SPECIFIC.
