Join Date: Feb 2010
Location: Thompson Falls, Montana
Feedback: 0 reviews
Runs hot or overheats? Those are 2 different things.
I've noticed a dozen or so threads over the years where someone puts an actual temperature gauge in and BAM, OMG it's running hot!
There are dozens of threads on here about fans/radiators/coolant/whatever to keep it from running so hot.
The reality is that the Pentastar is designed to run at 230 degrees in order to help clean up emissions, especially at idle.
They even dampen the stock temp gauge to hide the temp fluctuations, and if you look at the factory temp gauge, even at 230 degrees F, I bet it'll be in the normal range.
Don't make it a problem unless it's REALLY a problem.
Now,.... maybe that's not you.
If it's really overheating, blowing hoses, puking fluid, and snorting steam. then there are a couple of possibilities above from other users.
Plugged cats x2, or maybe the other head? There was some hubub a few years back about casting sand in the engine... can't remember what years that affected though. Seems like it was the early Pentastars.
Any other symptoms or engine codes?
'76 CJ-7, '43 CJ-2a, '78 Bronco,'78 CJ-7, '75 CJ-5, '78 CJ-7, '80 CJ-7, '78 SJ, '79 SJ, '78 and a '76 FJ-40 , '90 XJ, '91 XJ, '86 CJ-7, '95 ZJ, '68 CJ-101 Commando, '00 TJ, '68 M-715, 2 '86 Military Blazers, '96 LR Discovery, '86 CJ-7, '91 YJ, '99 TJ, 07' JKU Rubi, 1988 YJ, 1973 Commando, 3 Diesel Excursions....
Now back to a 2013 JKU Rubicon with "stuff", planning 37's with minimal lift.
I've tried them all... Jeeps are still the best. (0||||0)