Overheating...220+ - JeepForum.com
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post #1 of 14 Old 06-14-2021, 09:28 AM Thread Starter
Displaced in th
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Overheating...220+

Well, summer is here and with it high air and road temps.
Unfortunately for me it is also meaning overheating.

Background, replaced thermostat this winter with a 195 unit. Ran fine all winter and spring, long haul, city, steep mine road, canyon passes at 7,000 feet, no problem.

Then the heat hit. So I turned on the A/C.
That seems to be a thing, A/C on, overheating. Turn the A/C off, it retreats very slowly.
Then yesterday (outside temp 101) it began to overheat even without the A/C on in city traffic. Once back on the highway it retreated to 200.

Where to start? Fluid is full, mix is 50/50. Clutch fan has no play or wobble. No fluid leaking from stat or water pump. WP has no play, wobble or evidence of seal leakage. Fluid is not dirty or discolored.

This Jeep is new to me, bought in December of last year so this is our first summer together.

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post #2 of 14 Old 06-14-2021, 09:35 AM
Soem0
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Typically you will see higher temps with the ac on. The condenser sits in front of the radiator. It is a good idea to make sure it is cleaned. Clean the fins as well as in-between the radiator and the condenser
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post #3 of 14 Old 06-14-2021, 12:43 PM
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a WJ I guess, might let us knw what year and engine.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #4 of 14 Old 06-14-2021, 01:05 PM
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If this is for a WJ, this sounds like a radiator that has become clogged and is not circulating well enough.
To verify, the next time it overheats, run the heater on full. This enables a secondary radiator of sorts that should bring the temp back down. That verifies your WP is circulating and that the temp can come down with cool air moving over some heater core fins but your radiator is not able to circulate well enough.

Figure this one out with a high priority to do it soon. Consider the all-aluminum option from ebay.
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"We have it totally under control. Itís one person coming in from China. We have it under control. Itís going to be just fine." ~D. Trump, Jan 22, 2020.
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post #5 of 14 Old 06-14-2021, 05:55 PM Thread Starter
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Sorry, it's a 98, 4.3 V-8 Automatic.
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post #6 of 14 Old 06-14-2021, 06:02 PM
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Even if you fan clutch doesn't have wobble or play it could be on it's way out. Get the temp up up to where it's about to overheat and shut the engine off. The fan should stop spinning pretty quick if it's good. If it just continues to spin, the clutch is bad. If it is bad, that will also be effecting your a/c cooling
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post #7 of 14 Old 06-14-2021, 06:03 PM Thread Starter
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5.3 V-8
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post #8 of 14 Old 06-14-2021, 06:36 PM
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Posting in the WJ forum and claim this is a 98 jeep grand cherokee with a 4.3L or maybe a 5.8L - IDK something is not right.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #9 of 14 Old 06-14-2021, 07:19 PM
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sounds like he either has a typo, has no idea what engine he has, or worst of all, he has a chevy engine.

Uphill Slow, Downhill Fast, Tonnage First, Safety Last!
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post #10 of 14 Old 06-14-2021, 09:33 PM
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Quote:
Originally Posted by Golden-Arm View Post
sounds like he either has a typo, has no idea what engine he has, or worst of all, he has a chevy engine.
Even a Chevy V8 4.3L would be wrong. The Chevy 4.3L was a Vortec 6 cylinder. Had one in my 2000 S10 Blazer.
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post #11 of 14 Old 06-15-2021, 07:30 AM
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GM actually made a 4.3l V8, a little baby LT-1 from back in the late 90s. It didn't stick around long because it wasn't any better than the 4.3 V6.

But that would be the weirdest engine swap I've seen in a long time.
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post #12 of 14 Old 06-15-2021, 07:58 AM
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Displaced in th,

Go out to your Jeep, figure out what you have, then have someone else confirm it, then post a follow up note and delete the other posts.

"We have it totally under control. Itís one person coming in from China. We have it under control. Itís going to be just fine." ~D. Trump, Jan 22, 2020.
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post #13 of 14 Old 06-15-2021, 08:50 PM
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5.3 should be a chevy ecotech engine.



the 4.3 should be a poncho.



both of these seem to be "unusual" choices for chrysler to be slipping into jeeps....

Uphill Slow, Downhill Fast, Tonnage First, Safety Last!
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post #14 of 14 Old 06-16-2021, 07:21 AM
Delta0
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Are Jeep gauges noted for their accuracy?
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