My 71 Demon 340 4-speed is overheating. This past winter I replaced the intake and timing chain and gears. It had started overheating last year only in traffic and would cool down when traffic gor moving. Well this year after the work this past winter it would overheat and not cool down. So the old radiator that was in the car wasn't big enough 18 inch 4 core custom made from and after market radiator. It worked great for 8 years. So I bought a Champion 3 core radiator and a 17 thermostatically controled fan with a shroud. After I installed the radiator and fan. The car overheated right away and worse it overheats just driving. So last night I changed the waterpump and thermostat went to a 160 degree stat. Still same problem. Any help would great.

Thanks
Brian

I also removed 10 degrees of timing no difference

Make sure you have a 8 blade water pump,proper ratio of anti freeze and water and make sure the timing is not way off. You do have a shroud don't you ? By the way pressure test the system you may have a blown head gasket Look toward 2-4 and 5-7 they seem tolikentop pop in that area

More than likey the fan isnt moving enough air and its restricting the air flow preventing cooling at speed. Try a normal fan unit and see what happens. A 160 stat is NOT going to make the engine run any cooler than a 180 or 190 stat. The degree rating is olny the point that it is in the wide open position..

Put your 180 or 190 back in. A stat will not cause overheating. A stat cannot control temps that reach above the stat rating. A stat only helps the engine reach and maintain operating temp/stat rating temp quicker. You have other problems. What do you call overheating???
Only time a stat will create a heating problem is if it iw faulty.