How do I fix my engine Overheating Issue? and AC blowing hot air issue?

15

Asked by Jun 14, 2017 at 08:11 PM about the 1999 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

So I can not figure this out. I drive my jeep for 10 min. to work, at 50 mph.
Then when I get downtown  in slow traffic and red lights, my jeep stops
blowing cold air out the AC and the needle slowly rises from the operating
temp 195-200 degrees to 235-340 degrees. If Im cruising along fast (45-
60) the ac is working fine and engine is at normal operating temp. but when
i get into slow traffic or red lights, the air blows hot and jeep starts to
overheat?
I have replaced in the past 6 months- Head gasket, Water pump,
Thermostat, Temp Sensor, Radiator and hoses, Fan, New coolant, Belt
tension-er, Compression check on spark plugs are good ,all at 170 PSI.
All vacuum lines looks solid and only thing leaking is my rear main seal.
what do i do to fix these two issues?

4 Answers

32,765

CHECK TO MAKE SURE THAT A RADIATOR HOSE IS NOT COLASPING...WHEN YOUR CRUSING THE MOVING AIR FLOW THRU THE RAD. COOLS IT OFF... DOES THE RAD. CORE NEED TO BE RODED OUT/ REPLACED... AND THE FAN MANUAL OR ELECT?? IF MAN PUT A 10 BLADE ON IF ELECT TRY AND ADD A PUSHER FAN...?

15

my hoses are new. I have one electric brand new fan in the shroud.

Check if you fan is running in the right direction just had the same issue with mine place a paper towel in front of the radiator if it gets sucked in to grill and radiator fans correct if not that's the problem switching the wires around at the connection point if you had to clip the connector like I did off the fan to connect the wires switch the two wires at that point and test again all re wiring should be done with the jeep off let me know if that help

Sorry Marc jeep should be running while doing the paper towel test

Your Answer:

Grand Cherokee

Looking for a Used Grand Cherokee in your area?

CarGurus has 80,390 nationwide Grand Cherokee listings starting at $1,500.

ZIP:

Jeep Grand Cherokee Experts

  • #1
    inuevafreak
    Reputation
    2,280
  • #2
    thejeepdoctor
    Reputation
    2,130
  • #2
    tennisshoes
    Reputation
    2,130
View All

Related Models For Sale

Used Jeep Cherokee
564 Great Deals out of 75,105 listings starting at $5,995
Used Dodge Durango
360 Great Deals out of 26,064 listings starting at $1,595
Used Jeep Wrangler
222 Great Deals out of 14,682 listings starting at $3,000
Used Ford Explorer
902 Great Deals out of 72,540 listings starting at $495
Used Toyota 4Runner
237 Great Deals out of 32,825 listings starting at $2,305
Used Chevrolet Tahoe
613 Great Deals out of 37,825 listings starting at $1,950
Used Ford F-150
2,227 Great Deals out of 186,956 listings starting at $1,200
Used Chevrolet Silverado 1500
1,773 Great Deals out of 154,146 listings starting at $1,995
Used Ford Mustang
352 Great Deals out of 39,215 listings starting at $1,995
Used Chevrolet Camaro
297 Great Deals out of 26,877 listings starting at $2,700
Used GMC Sierra 1500
666 Great Deals out of 56,035 listings starting at $1,500

Used Cars For Sale

2018 Jeep Grand Cherokee Laredo 4WD For Sale
4,281 listings starting at $24,980
2017 Jeep Grand Cherokee Laredo 4WD For Sale
16 Great Deals out of 516 listings starting at $20,500
2016 Jeep Grand Cherokee Laredo 4WD For Sale
9 Great Deals out of 377 listings starting at $18,495
2015 Jeep Grand Cherokee Laredo 4WD For Sale
51 Great Deals out of 1,497 listings starting at $13,500
2014 Jeep Grand Cherokee Laredo 4WD For Sale
13 Great Deals out of 474 listings starting at $10,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.