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Old 09-05-2010, 05:22 AM   #1
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Overheating Issues

okay okay okay, so I just recently purchased another jeep, it's an 01 wrangler sport and it's a real gem been babied and taken great care of and ever since I've had it it's run hot but that's okay, I live in Casa Grande it's a hot climate and I understand that.. But, just these past few days it's been overheating and I am at a loss as of late. I popped the hood the first day I bought it, and I noticed that the cooling system is way overfilled, as all of you know, the TJ has a clear coolant reservoir and the fluid is filled up roughly 5 or 6 inches over the "full" notch in the tank. That's all well and good, I'll flush and drain the system and refill it, I says to myself. Well, my previous jeep (a '97 Wrangler) had no special little tab that says, "special coolant required". I do the research on said "special" coolant and find out that what I need is HOAT, (never heard of) and after finding out that the aftermarket brand is Zerex, I was quite discouraged because I realized that I know just about nobody carries Zerex nowadays. This was all confirmed as I drove around to all the local parthouses and realized they didn't carry it. I forgot about NAPA,but by the time I had thought of it, they were closed. Some of my friends have told me that the only way they know of to get this HOAT coolant is to go into an actual MOPAR shop.... The radiator cap was loose on it and was spewing coolant all over the place and so I figured that it was a cap issue, but the cap is new, the seals are good, the pressure rating is correct so I don't think it's the cap anymore. I called the previous owner and he informed me that he had just had the radiator replaced (due to a leak) in July of this year and that he has never had any overheating issues. Oh, and when I ran it today and popped the cap off, there was a ton of crap on the cap and on the coils that were visible. What exactly do I do here? Am I correct in thinking that my issue is the system is overfilled? Or is it a thermostat problem, and if so, should I replace it with a 180*? Should I flush the radiator even though I don't have this HOAT coolant and just go with the standard staple PRESTONE 50/50 extended life green coolant? (I heard the HOAT is brown-red?) There is orange coolant and green coolant in the reservoir with the orange at the bottom and the greenish-yellowy stuff more towards the top, is this in any way significant? I'm not a mechanic by any means, but I know the fundamentals, so I'm open to any suggestions and advice.
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Old 09-05-2010, 06:24 AM   #2
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how hot is it reading? I would drain it, Fill with 50 /50 mix. Then make sure all the air is out. Then go from there.

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Old 09-05-2010, 06:37 AM   #3
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Drain it and flush it several times. Drive it around as the flushes progress and see if it improves. This can take several hours or days. Do it until the water is clear. My guess is the thermostat gets stuck closed or halfway and when it opens up the violent churning off superhot water breaks loose all of the gunk and deposits that you see when you take off the cap. Read the back of the coolant bottles. I changed mine with I forget the brand but it wasn't Zerex. Alot of them say can be used in hoat type.
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Old 09-05-2010, 10:29 AM   #4
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Napa sells G-05 which is Hoat.
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Old 09-05-2010, 11:31 AM   #5
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Don't put a 180 thermostat in it, it won't help. Stay with 195. How hot is it getting ? 210 is fine.
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Old 09-05-2010, 02:01 PM   #6
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When the cap was partly off, (due to pressure I believe from the overfilled system) it was reading about 230 235 and climbing. I put the cap back on and the next day I figured that was all that was the problem and it turns out that it started to overheat again.
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Old 09-05-2010, 06:21 PM   #7
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What is your outside temp and driving conditions when it heats? Do you know if it is a 2 or 3 core radiator? I think a 2 core is stock and barely enough to cool it especially when running the ac. Can you hear the fan clutch kick in when it starts getting warm/hot?
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Old 09-05-2010, 07:14 PM   #8
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During the heat of the day, it will go over 110* out here... But, I am not pinning gears or anything, I'm just putting around from here to there. Just daily driving type stuff... And yes, I can hear a fan kick on.
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Old 09-05-2010, 07:21 PM   #9
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go to your local autoparts store and get a flush kit. follow the instructions. also, i would check your themostat. the PO might have put a new radiator in but maybe forgot to flush the system. you said that you had a bunch of gunk on your rad cap. so therefore, flush the system and use 50/50 coolant. do not use tap water. if you have to use water use distilled water only along with coolant. but 50/50 is best. here in south ga with the humidity and heat, i haven't had any overheating issues.
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Old 09-05-2010, 07:29 PM   #10
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over heat

Quote:
Originally Posted by elijah.caine View Post
okay okay okay, so I just recently purchased another jeep, it's an 01 wrangler sport and it's a real gem been babied and taken great care of and ever since I've had it it's run hot but that's okay, I live in Casa Grande it's a hot climate and I understand that.. But, just these past few days it's been overheating and I am at a loss as of late. I popped the hood the first day I bought it, and I noticed that the cooling system is way overfilled, as all of you know, the TJ has a clear coolant reservoir and the fluid is filled up roughly 5 or 6 inches over the "full" notch in the tank. That's all well and good, I'll flush and drain the system and refill it, I says to myself. Well, my previous jeep (a '97 Wrangler) had no special little tab that says, "special coolant required". I do the research on said "special" coolant and find out that what I need is HOAT, (never heard of) and after finding out that the aftermarket brand is Zerex, I was quite discouraged because I realized that I know just about nobody carries Zerex nowadays. This was all confirmed as I drove around to all the local parthouses and realized they didn't carry it. I forgot about NAPA,but by the time I had thought of it, they were closed. Some of my friends have told me that the only way they know of to get this HOAT coolant is to go into an actual MOPAR shop.... The radiator cap was loose on it and was spewing coolant all over the place and so I figured that it was a cap issue, but the cap is new, the seals are good, the pressure rating is correct so I don't think it's the cap anymore. I called the previous owner and he informed me that he had just had the radiator replaced (due to a leak) in July of this year and that he has never had any overheating issues. Oh, and when I ran it today and popped the cap off, there was a ton of crap on the cap and on the coils that were visible. What exactly do I do here? Am I correct in thinking that my issue is the system is overfilled? Or is it a thermostat problem, and if so, should I replace it with a 180*? Should I flush the radiator even though I don't have this HOAT coolant and just go with the standard staple PRESTONE 50/50 extended life green coolant? (I heard the HOAT is brown-red?) There is orange coolant and green coolant in the reservoir with the orange at the bottom and the greenish-yellowy stuff more towards the top, is this in any way significant? I'm not a mechanic by any means, but I know the fundamentals, so I'm open to any suggestions and advice.
Thanks.
take the fan blade and spin it , if it spins easy you may have a bad clutch on the fan blade , also check and see if the radiator hose's are soft especialy the top hose , motorhome anti-freeze its pink and made for hard driving
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Old 09-05-2010, 07:48 PM   #11
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Well.... New development... Puddle and haven't driven it at all today.... Damnit
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Old 09-05-2010, 08:01 PM   #12
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And if you have crud in the radiator flush it out that mite by barsleak because the heater coil has a leak
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Old 09-05-2010, 08:05 PM   #13
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It's in a really weird spot? It's not actually leaking from the radiator, it's leaking coolant between the bottom most pulley and the actual block. It's coming from the block. I've got a really bad feeling this is going to be bad bad news? HELP
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Old 09-05-2010, 08:05 PM   #14
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Over heat

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Originally Posted by hookuspookus View Post
take the fan blade and spin it , if it spins easy you may have a bad clutch on the fan blade , also check and see if the radiator hose's are soft especialy the top hose , motorhome anti-freeze its pink and made for hard driving
never, never , never , never use tap water it rots the radiator , go to your grocery store and use distilled water only !!!!!!!!!!!!!!!!!!!!
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Old 09-05-2010, 08:09 PM   #15
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Leak

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it's in a really weird spot? It's not actually leaking from the radiator, it's leaking coolant between the bottom most pulley and the actual block. It's coming from the block. I've got a really bad feeling this is going to be bad bad news? Help
your water pump has whats called a weep hole , it leaks when the water pump seal goe's take the pump off and see if it has a stain on it near the weep hole if it doe's change the water pump, there is no water in the block over the pully , bad water pump. Let me know what happens , scott
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Old 09-05-2010, 08:20 PM   #16
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Quote:
Originally Posted by hookuspookus
your water pump has whats called a weep hole , it leaks when the water pump seal goe's take the pump off and see if it has a stain on it near the weep hole if it doe's change the water pump, there is no water in the block over the pully , bad water pump. Let me know what happens , scott
Scott, thanks for the info my friend I have very little experience with coolant systems. Why would it be leaking now at 6:16 without even having driven it at all today? Plus, is this weep hole possibly caused by an overfilling of the coolant system? Because it's been way overfilled. I'm gonna PM you and send you some full size pics if that's cool?
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Old 09-05-2010, 08:24 PM   #17
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Quote:
Originally Posted by hookuspookus
And if you have crud in the radiator flush it out that mite by barsleak because the heater coil has a leak
Possibly the previous owner did not replace the rad. Maybe they just pumped it full of sealant (all the crud) does it look sort of like kitty litter. Too much sealant will clog all the passages in the rad and it won't cool properly. As for the leak by you block. ... Could that be your water pump. They usually have a weeping hole to let you know when the seal is gone.


Too much coolant should really not cause any problems. It will just spill over as your resevoir overflows. May have been overfilled to compensate for a leak??
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Old 09-05-2010, 08:48 PM   #18
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No the radiator was replaced, I have the receipt from NAPA. I trust the guy I bought it from, I doubt he would have screwed me over.
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Old 09-05-2010, 10:17 PM   #19
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No the radiator was replaced, I have the receipt from NAPA. I trust the guy I bought it from, I doubt he would have screwed me over.
Well that's good news. When the Jeep heats up your reservoir level may rise and you might hear bubbling as the air gets pushed out. When the Jeep cools down the rad cap will allow it to suck coolant out of the reservoir back into the rad. If this is happening then chances are your rad cap and system are working OK.
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Old 09-06-2010, 08:17 PM   #20
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Update: turns out it was a water pump failure. Thank you everyone for your assistance, I got it replaced today
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Old 09-07-2010, 07:52 AM   #21
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Hi

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so do i know my sheit or what ! I was a mechanic since i was 12 yo , my dad taught me starting at the age of 5 , as you can see they're alot of people giving advice, but even they don't know what the f they are talking about. I do . If you ever need help again feel free to get back intouch . Scott in jersey
and remember never use water from your house always buy distilled water from your grocery store , house water rots the water pump bearing seal and it destroys your radiator thats because it is called hard water it has minerals in it and is really bad for your cooling system
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Old 09-10-2010, 10:53 PM   #22
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Hey you sure do man. Thanks. Saved me a lot of hassle I'll be sure to look you up if I have any other issues. Keep it real!
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Old 09-13-2010, 05:10 AM   #23
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I see this thread turned into a train wreck. This thread has been cleaned up, Anymore name calling or bashing and it WILL BE LOCKED!

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