I've checked my radiator coolant for a possible combustion leak and there was no color change or indication of a combustion leak which is good, but I'm still chasing an overheating engine. My engine was totally rebuilt just a few years ago by a professional and by a trusted machine shop. I've replaced by water pump and I've checked the engine timing. I've check the heat riser and/or valve that is temperature controlled to add heat to the intake manifold during start up to make sure it's not stuck. The engine runs great, but it still overheats? I'm going down the path of purchasing an aluminum radiator but what I'm finding is no one makes one with the stock inlet 1.25" and stock outlet 1.50" radiator connections. Finding adapter for 1.50 to 1.25 and 1.75 to 1.50 is like trying to find a unicorn! LOL! I appreciate all the suggestions you guys have been providing.
