deal fellow TJers, I am looking into my TJ (4.0,42RLE) in which I am running new radiator, new coolant, new Hayden fan clutch, with properly working AC, and a winch mounted in the front. Thermostat and water pump seems to operate as expected, so don’t believe that I need to replace them.
What I see is that in stop and go traffic it gets always beyond 210, the same when parked in idle, even at the evening, with 87F outside.
I am in Houston area, so temperatures here easily reach 100F during the day. Also, as we all know the summers are getting hotter, so I am thinking about how to improve the cooling.
I have one step already on my schedule,. Which is adding Derale cooler for 42RLE, which will prevent the 42RLE from overheating.
Other step that is planned is to install louver (Poison Spyder), that will help to reduce the heat soak and heat buildup in the engine bay.
But, I am thinking about enhancing the engine cooling, using the following;
To tap into hot coolant line that go into the cabin, add a 3 way valve, that enables to route t he coolant into cabin or to additional cooler, and additional small radiator, with electric fan. I want to put somewhere near the Derale cooler for transmission, so that it takes away the heat from the engine Bay Area.
Before I jump into anything like, wanted to hear the opinion of experts here, I am sure that a lot of folks through about it before.
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