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sprinkles08
sprinkles08, ASE Certified Technician
Category: Jeep
Satisfied Customers: 21977
Experience:  Chrysler/Dodge/Jeep Master Certified, ASE Master and Advanced Certified, Trans and Hybrid Specialist
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Cherokee: I have a 2000 cherokee with a 4.0, I had the engine

Customer Question

I have a 2000 cherokee with a 4.0, I had the engine rebuilt. Engine overheated within the first 100 miles, the shop took it back and replaced the engine, ran good at slow speeds but at high speeds the engine starts overheating again, they replaced the engine again and also redid the radiator with new hoses new thermostat new water pump and new fan clutch but engine still overheats at high speed, and also getting moisture out of the air intake.
3 engines
Complete cooling system
And still same problem
Submitted: 1 year ago.
Category: Jeep
Expert:  sprinkles08 replied 1 year ago.
Hello and welcome to JustAnswer!
If an engine overheats under higher load it's usually because of a restricted radiator. When cores become restricted it effectively reduces the capacity of the radiator and it can become bad enough that it causes the engine to run hot or overheat.
What exactly was done with the radiator?
What was the original problem that engine work was done for?
Does it use coolant with no external leaks?
Customer: replied 1 year ago.
Radiator completely cleaned out
Car overheated and the rods started knocking
It does use coolant and it has no leaks
Expert:  sprinkles08 replied 1 year ago.
What specifically was done with the radiator to try and clean it out?
Customer: replied 1 year ago.
It was taken to a radiator shop and they rebuilt it
Expert:  sprinkles08 replied 1 year ago.
How far over normal does it go?
It only gets hot under higher loads or speeds?
Does it come down on it's own when you slow down or idle?
Customer: replied 1 year ago.
It get up to the red.
Yes it runs good on The street but when you get it on the freeway then the temperature climbs a bit past halfway and all of a sudden it jumps past the 3/4 mark and keeps climbing.
The temperature does not come when I slow down or at idle.
Also what about the moisture coming out of the air filter
Expert:  sprinkles08 replied 1 year ago.
Can you explain or (preferred) upload a picture of what you're seeing?