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Ive changed the radiator,water pump and the thermostat and

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all the hose but it...
ive changed the radiator,water pump and the thermostat and all the hose but it still is over heating .. what else can it be?
JA: Has the vehicle ever overheated? And when was it last serviced?
Customer: it has never overheated and i just serviced it two days ago
JA: What is the model/year of your Jeep?
Customer: 95 jeep grand cherokee laredo 4wd
JA: Are you fixing your Grand Cherokee yourself? What have you tried so far?
Customer: yes , i am. i ve changed the cover gasket and the manifold gasket has well. after changing that it started overheading
JA: Anything else you want the mechanic to know before I connect you?
Customer: no thats all
Submitted: 8 months ago.Category: Jeep
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Answered in 7 minutes by:
5/1/2017
Jeep Mechanic: eauto, The Car Guy replied 8 months ago
eauto
eauto, The Car Guy
Category: Jeep
Satisfied Customers: 16,726
Experience: ase mechanic 16 Plus years in the field
Verified

Hi . Thank you for asking your question on JustAnswer.

Thank you again for trusting us with your problem. John aka eauto

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Jeep Mechanic: eauto, The Car Guy replied 8 months ago

have you tested for head gasket failure?

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Customer reply replied 8 months ago
no i haven't
Customer reply replied 8 months ago
how can i check it for head gasket failure
Jeep Mechanic: eauto, The Car Guy replied 8 months ago

is it building pressure in the hoses?

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Jeep Mechanic: eauto, The Car Guy replied 8 months ago

this is a chenical test to check head/head gasket failures

https://shop.advanceautoparts.com/p/uview-combustion-leak-tester-uvu560000/22981757-P

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Customer reply replied 8 months ago
`theres no signs of chemical mixing ,the coolant and the oil . it has pressure in the hose and there no smoke coming out the muffler in which i do feel the air pressure.
Jeep Mechanic: eauto, The Car Guy replied 8 months ago

is it pushing exhaaust into the radiator ?

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Customer reply replied 8 months ago
im not sure . how can you tell if it is cause i cant tell the difference
Customer reply replied 8 months ago
the car will overheat 3/4 and it won't go any higher. we can still drive it and even if the a/c is on it won't get any hotter.
Jeep Mechanic: eauto, The Car Guy replied 8 months ago

is the dash gauge correct? is it overheating? have you verified coolant temp

?

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Customer reply replied 8 months ago
the temperature sensor is new and the gauge is correct as well.because if i disconnect the sensor the temp. gauge goes all the way down. and as soon as it's connected again it goes up again.
Jeep Mechanic: eauto, The Car Guy replied 8 months ago

i would have a combustion leak test performed very likley it has a small head gasket leak or a cracked head...somwhat common on the old inline 6 motors

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Customer reply replied 8 months ago
can i get this checked at a auto part or advanced auto
Jeep Mechanic: eauto, The Car Guy replied 8 months ago

no but they will sell you the test kit to do it yourself

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Customer reply replied 8 months ago
ive changed the injectors ,and the problem that i had with the manifold i no longer have it. i changed my spark plugs and wires so the manifold problem is gone. but the problem of the motor overheating still remains
Jeep Mechanic: eauto, The Car Guy replied 8 months ago

sounds like a head or head gasket issue... if everything else is changed and good its a head or head gasket very common...and they dont always smoke or have intermix

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Customer reply replied 8 months ago
thank you
Jeep Mechanic: eauto, The Car Guy replied 8 months ago

Please let me know if you need anything else on it, just reply back and we will continue
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you can always come back to this conversation and ask me any follow up question you may have on this issue
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Thank You
John S
ASE Certified Technician

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Customer reply replied 8 months ago
I did the test but the car is still heating up
Customer reply replied 8 months ago
Everything came out fine
Jeep Mechanic: eauto, The Car Guy replied 8 months ago

fan working correct?

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Customer reply replied 8 months ago
Thats what has me so confused
Jeep Mechanic: eauto, The Car Guy replied 8 months ago

if the fan is working correct and the water pump is circulating and the radiator has no restrictions and the thermostat is working then its a head or head gasket...even if it passed the combustion test...the combustion check can be wrong especially if not tested when its acting up..

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Customer reply replied 8 months ago
What else can it be if the spark lungs are dry with no oil
Jeep Mechanic: eauto, The Car Guy replied 8 months ago

pics of the plugs?

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Jeep Mechanic: eauto, The Car Guy replied 8 months ago

and your positive its overheating?

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Customer reply replied 8 months ago
Can it be that the catalyst could be clogged and causing it to heat up
Jeep Mechanic: eauto, The Car Guy replied 8 months ago

nope

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eauto
eauto
eauto, The Car Guy
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