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  1. Engines & Drivetrain
    I have a 1979 CJ5 that has chevy 350 swapped in. It is overheating at idle up 230 is the highest I've seen it. I've replace the thermostat and water pump, then flushed the radiator, but still having the same issue. I put my big shop fan and front of it and it set around 190 just idling. It's...
  2. Engines & Drivetrain
    RESOLVED I saw the issue immediately when I took apart the connector for the electric fan. The male pins were loose and not even properly engaging the female pins. Tweaking the male pins just enough, made them tighter in their bores and properly aligned them again. The connector will likely...
  3. WK Grand Cherokee & XK Commander Forum
    When I first brought my Jeep home I noticed that the climate control panel was very hot to the touch after an extended period of driving. Here's what I did to fix it. I pulled all of the dash switches/buttons/knobs out and confirmed that none of the circuit boards were burnt or broken. All of...
  4. JK Wrangler Technical Forum
    This is a 2013 jk with a 3.6 engine. I’ll try to make this short and sweet, I’ll start off by admitting I had unknowingly ran it at 40mph in first gear so high rpm, right after I had a major coolant leak. Its location is somewhere right above the transmission, and just behind the engine. The...
  5. JK Wrangler Technical Forum
    Hi All - Having a strange issue. My 13 JK started running hot and fan was running like crazy, it was mitigated by blasting the heat, and it was clear it was the cooling system. Took it to the dealer (was busy at work and they have reasonable rates) and they replaced the radiator, hoses and...
  6. XJ Cherokee Technical Forum
    I just rebuilt my 95 XJ and I did the rod bearings main bearings new Pistons new Rings new water pump new thermostat had the head completely redone new head gasket of course did the whole rebuild I was having overheating problems and I kept checking my dipstick and it was giving me very clean...
  7. WJ Grand Cherokee Forum
    Hello! So I finally broke down after being unable to solve my issue. ~ Sorry upfront about the long post. My questions are at the top so you don’t have to read all of it. My 2002 jeep grand Cherokee 4.7 HO is having cooling issues. I have the hydraulic fan set up that runs off the power steering...
  8. XJ Cherokee Technical Forum
    I have an interesting problem going on with my 1999 Cherokee XJ 4.0 4 x 4. I have been working on my cars for a few years now but my recent purchase of the XJ has me stumped. It’s a low mileage one so it definitely sat awhile so when I encountered my first overheating problem I wanted to...
  9. WJ Grand Cherokee Forum
    I was driving to Walmart about 0.6 miles from my house and the guage went up to 260°F kind of rapidly. I pulled over when the check guages light came on while beeping. Let it cool for 50min then checked fluids. The motor oil was just changed before, new filter and synthetic oil that's high...
  10. XJ Cherokee Technical Forum
    I know I know... There are a million "XJ overheating" threads but I'm really at a loss here even after reading every forum I could find... I have a 1991 4.0, AX-15, XJ... I overheat while idling, but here's the catch... Everything is new on that car! Motor has 3k miles on it, entire cooling...
  11. Jeep Grand Cherokee & Commander Forums
    So the history: Has new radiator, thermostat, fan assembly, 2 new cube relays in fuse box, cut out under the headlight there is no relay there ( They stopped doing this somewhere between 2003 and 2004. Ha ha the dealer did not even know that, and I found out after I cut it out after extensive...
  12. KK Liberty Forum
    Hello, please please any help is greatly appreciated because I’m at a loss of what to do. I apologize for the lengthy post I tried to condense it but felt that everything was important to note. So please bear with me and I appreciate those of you who make it to the end! : I have a 2009 jeep...
  13. WJ Grand Cherokee Forum
    2004 WJ, Quadra Trac 545RFE. 5 speed. I shift fine and at all speed. PO740 Code at 55 mph after 10 to 15 miles. no other codes. Shifts Great. Low speeds and off road slow speeds does not through code. We diagnosed that it will actually get hot up to 250 degrees F on payment on steep climbs...
  14. XJ Cherokee Technical Forum
    Not sure if this is related, but my XJ has been acting weird since I replaced a damaged exhaust header. 1999 XJ 4DR, 4WD, 4.0 with 150,000 miles. The exhaust header was cracked wide open near the collector and I finally replaced it after the noise was just too annoying. The old one was...
  15. TJ Wrangler Technical Forum
    Need a Jeep guru to help diagnose and resolve why this poor Jeep keeps losing it's cool? I have tried everything... to no avail. This video covers everything instead of having to read all symptoms and such... Is there an underlying problem I have missed? Or am I just pushing it beyond...
  16. New Members/Introductions
    Hello! I've been working off and on with my 2000 WJ 4.7 for a while, and recently moved to central Texas. First, the AC system failed, then I noticed the vehicle overheating regularly at highway speeds. It stays right at 210 in town, and no overheating issues until it gets out on the highway...
  17. New Members/Introductions
    Hello, I've grown up working on stuff, but am getting over my head on this project. I have a 78 CJ5 with at 304. Bought it used a few years ago. It ran fine until recently, and I've noticed the following issues. After I let it sit for 4-5 days, it won't turn over when I crank. Seems like...
  18. Engines & Drivetrain
    2000 Jeep Cherokee Sport (4.0 L, 4x4). I had my engine idling for about 10 minutes. I then shut it off. About 2 minutes after I turned it off, the coolant began to bubble out of the overflow/reservoir tank. It was fine when the engine was running, and the temperature gauge was sitting right...
  19. ZJ Grand Cherokee Forum
    This is a 96 Grand Cherokee, inline 4.0 six, near 200k miles, very few problems to now. Good old machine. Running real hot suddenly. Before the big write up, is there a definite test for bad head gasket or cracked head? Whole lot of R&R work there. Driving the Jeep and noted temp gauge at...
  20. Engines & Drivetrain
    I have 2000 Cherokee XJ Sport 4L with 99k miles and I have been having overheating problems over the last couple weeks. So far I've replaced my thermostat, radiator cap, water pump, hoses, head gasket, and intake manifold. The radiator is ~3 years old. My check gauges light will come on and...
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