Jeep 4.6 Cooling System by Chad Golen September 29, 2021 0 We have had quite a few customers ask about what keep this engine cool and here is a list of what you will need: Areas of the country where there is not extreme heat Stock Radiator will work in most cases (makes sure yours is in good shape) Stock Clutch Fan Stock 190 Degree Thermostat Stock or High Volume water pump Areas of the country where there is extreme heat Griffin Aluminum Radiator Stock Clutch Fan 160-180 Degree Thermostat High Volume water pump Here is an email that we got from one of our customers in Arizona: Chad switched back to clutch fan and shroud . Also put oem style aux e fan . 180 degree t stat. Griffin radiator. It runs between 180 and 190 all day long in the high temps of southern az. ALSO THE ENGINE IS RUNNING AMAZING. ABOUT 1000 MILES. I FIGURED THIS MAY HELP IF PEOPLE HIT YOU UP ON THIS SUBJECT. I BELIEVE THE E FANS WERE THE BIGGEST PART OF THE PROB. THE GRIFFIN RADIATOR DIDNT COOL WITH THE TRIPLE E FANS. THANX JIM Author Chad Golen Chad Golen is the founder and owner of Golen Engine Service, where he and his team build custom LSx, Jeep stroker, and muscle car engines in their Hudson, NH machine shop.