Long time forum reader, first time poster! I’m finally fixing up my bone-stock 6-speed ‘05 LJ Rubicon. My goal overall is to use the best components I can, with my plans on keeping this Jeep in the family forever. Im in the process of installing a Clayton suspension kit, steering upgrade, drive-shaft, gears, axle shaft upgrade, and some engine modifications. I’m also replacing the radiator with an aluminum Griffin unit, matched up with a new Mopar water pump. My question to the forum is, after flushing the system, what is the best or recommended coolant type / brand to use for a ‘05 4.0 TJ with an aftermarket aluminum radiator? My goals are cool temps and long lasting performance. Thanks very much, greatly appreciate the knowledge on this forum!
What coolant for aluminum radiator?
- Thread starter Kkquincy
- Start date
Standard green universal is what I have in mine with aluminum radiator. I fully flushed out the entire engine before filling.
Zerex G-05 is the best. It is Hybrid Organic Acid Technology, or HOAT and is what is specificied by Chrysler. If you don't know what's currently in the engine do a very thorough flush with distilled water. Different coolants aren't always compatible with each other.
Sounds good thanks, that’s my plan to thoroughly flush so start over properly from scratch
Use whatever antifreeze you like and change it every few years.
Universal green. Works fine, and you can find it pretty much anywhere. If a place has antifreeze, they always at least have universal IME. Great for when a hose takes a shit 2 hours from home and you need a compatible coolant to get home.
Ask me how I know...
If I was two hours from home when a hose took a shit I'd be happy running tap water.
I actually had a hose blow last year but was about an hour from home. I bought what was the most expensive bottles of mineral water I've ever purchased to fill the system and get home. It got a full flush and fresh coolant the next day.
I actually had a hose blow last year but was about an hour from home. I bought what was the most expensive bottles of mineral water I've ever purchased to fill the system and get home. It got a full flush and fresh coolant the next day.
I always kept a few green jugs in mine. If I needed more, I didn't have to question where to get more coolant. Anywhere would likely have it. That way I don't have to run tap water or wait for a tow
I had a Ford escort blow a hose clamp. Got it fastend back on and the only fluid I could find was the Coke in my back seat. Two hours later I made it to my parents house and flushed it the next day. When I did I was greeted with a big surprise...the aluminum in the radiator was shinier than new. No trouble for the next few years until I had the POS towed to the dump.
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