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Overheating Issue


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I've got an issue and I'm a little confused. My 03 liberty is overheating but the thing about it is ...

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Old 08-11-2018, 09:25 PM   #1 (permalink)
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Default Overheating Issue

I've got an issue and I'm a little confused. My 03 liberty is overheating but the thing about it is if I'm driving faster than 45 than it does fine as long as its not above 80 outside. I can turn the heater on if I'm driving slower than 45 and it will help keep it in check. It's never overheated past the hash mark past the middle. I've changed the fan relay and the thermostat. It doesn't show any classic signs like white in oil or coolant smell in oil to indicate blown head gasket. The oil is the right level and plenty of coolant in resivoir.

What should I check and start replacing?
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Old 08-12-2018, 01:03 AM   #2 (permalink)
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Originally Posted by ckenney35 View Post
I've got an issue and I'm a little confused. My 03 liberty is overheating but the thing about it is if I'm driving faster than 45 than it does fine as long as its not above 80 outside. I can turn the heater on if I'm driving slower than 45 and it will help keep it in check. It's never overheated past the hash mark past the middle. I've changed the fan relay and the thermostat. It doesn't show any classic signs like white in oil or coolant smell in oil to indicate blown head gasket. The oil is the right level and plenty of coolant in resivoir.

What should I check and start replacing?
Maybe I should clarify. The normal temp on the gauge is the hash mark in the middle....when car starts to overheat I have pulled over and shut off before it has ever gotten to the next hash mark up from that. Just saying that to hope that I've not done and damage to engine

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Old 08-12-2018, 02:56 AM   #3 (permalink)
 
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waterpump maybe?
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Old 08-12-2018, 04:48 AM   #4 (permalink)
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Is the electric fan actually coming ON?

You may have air in the system and need to burp the air out.

Is coolant a mix of clean water and HOAT anti-freeze?

Radiator clean of insects, grass etc.?

System under pressure when warm ie. radiator cap working properly?

Could be thermostat or water pump.
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Old 08-12-2018, 10:19 AM   #5 (permalink)
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Originally Posted by Billwill View Post
Is the electric fan actually coming ON?

You may have air in the system and need to burp the air out.

Is coolant a mix of clean water and HOAT anti-freeze?

Radiator clean of insects, grass etc.?

System under pressure when warm ie. radiator cap working properly?

Could be thermostat or water pump.
Don't see an electric fan, I see the belt driven fan

How would I burp the system

Weird thing is I do not see a radiator cap. There is a cap on the overflow resivoir but that's it.

I don't see any bugs on radiator but just in case is it safe to wash with hose or power wash at local car wash

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Old 08-12-2018, 10:21 AM   #6 (permalink)
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Originally Posted by Billwill View Post
Is the electric fan actually coming ON?

You may have air in the system and need to burp the air out.

Is coolant a mix of clean water and HOAT anti-freeze?

Radiator clean of insects, grass etc.?

System under pressure when warm ie. radiator cap working properly?

Could be thermostat or water pump.
Also not sure of coolant, it's whatever the tire place put in when I had it flushed last year

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Old 08-12-2018, 11:57 AM   #7 (permalink)
 
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How many miles on your 2003 KJ?
No electrical cooling fan Huh? You sure there is not an electrical fan?
Post a photo of what you have in there...
HOAT 0r Zerex-G05 coolant only...flush at the dealer would be recommended!
If it is high mileage throw a new water pump in there, the plastic impeller OEM pumps get eaten by the wrong coolants.
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Old 08-12-2018, 05:44 PM   #8 (permalink)
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ok so is your fluid Green or pink? If it's green, your screwed. The shop put in the wrong stuff and you likely have jelly all through your system.

If it's pink then let's move on:

- As far as I know all Liberty's of that year had both a belt driven fan and electric fan if equiped with the towing package. If the belt driven fan is moving and you can hear the clutch kicking in and out then your good most likely.

- Check for leaks, especially along the corner facing engine, driver's side, of the radiator. There is a plastic bracket there which tends to crack. If you are not maintaining pressure you will have problems.

- Burp the system. You can either use the official way by using the burp plug or park on an incline and let the engine idle will usually do it.

- Fluid at right level?

If the shop mixed your fluids and you are no longer running HOAT then your only safe course of action is to go get a full flushing at a site which uses an under pressure, heated flush with CLR. Even then you will likely continue to have jelly in the system.
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Old 08-12-2018, 08:38 PM   #9 (permalink)
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Originally Posted by JBDive View Post
ok so is your fluid Green or pink? If it's green, your screwed. The shop put in the wrong stuff and you likely have jelly all through your system.

If it's pink then let's move on:

- As far as I know all Liberty's of that year had both a belt driven fan and electric fan if equiped with the towing package. If the belt driven fan is moving and you can hear the clutch kicking in and out then your good most likely.

- Check for leaks, especially along the corner facing engine, driver's side, of the radiator. There is a plastic bracket there which tends to crack. If you are not maintaining pressure you will have problems.

- Burp the system. You can either use the official way by using the burp plug or park on an incline and let the engine idle will usually do it.

- Fluid at right level?

If the shop mixed your fluids and you are no longer running HOAT then your only safe course of action is to go get a full flushing at a site which uses an under pressure, heated flush with CLR. Even then you will likely continue to have jelly in the system.
I found the electric fan but haven't been able to check if it's kicking on or not yet. The fuse is good though.

Coolant is an orange or almost rust color. I'll be honest it looks like there is rust in the resivoir and on the cap. I do remember the auto shop I take it to told me I could only use dex-cool coolant because it's made by Chrysler.

I also noticed this today while checking hoses for leaks. I can squeeze the top hose on radiator and hear fluid going through hose but whenever I squeeze bottom hose it's almost hard as a rock and I can feel what I assume is rust buildup or something but I don't hear fluid rushing through like on top hose.

If the coolant hurt system how much is the flush gonna cost me and how easy is a water pump change. I'm moderately mechanicly inclined changed many things on my card in the past. As long as I don't have to change engine I should be okay to do myself

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Old 08-12-2018, 08:39 PM   #10 (permalink)
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Originally Posted by LibertyTC View Post
How many miles on your 2003 KJ?
No electrical cooling fan Huh? You sure there is not an electrical fan?
Post a photo of what you have in there...
HOAT 0r Zerex-G05 coolant only...flush at the dealer would be recommended!
If it is high mileage throw a new water pump in there, the plastic impeller OEM pumps get eaten by the wrong coolants.
It's got 267,000 miles on it but no one knows exact mileage. It was towed behind a camper most of its life before I got it

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