need helppp!!!

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04-11-2011, 09:53 PM

#16

Doc Brnard

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Year: 1991

Model: Cherokee

Engine: 4.0 litre

Quote:

Originally Posted by The Rooster

does his dad know how to do a compression test? and if no one knows how to do it... its time to learn

Yep.

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04-11-2011, 09:55 PM

#17

Doc Brnard

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Year: 1991

Model: Cherokee

Engine: 4.0 litre

Quote:

Have your friend join here. It will take less time, rather than going thru a middle man

Seriously. It would really help here. Especially if he can check things as they are suggested by members here. Gives people a better understanding of what's going on.

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04-11-2011, 10:03 PM

#18

Copytech

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Year: 1994

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by fishmandan

has he ever used any of that stop leak crap, maybe it has clogged up some if the coolant channels running threw the block itself. sorry about the water pump post i didnt see that till after i posted

That doesn't mean it isn't in there the factory is known to put some in "just in case"
Also sealant isn't the only thing that will plug up a cooling system. Anti freeze will go bad, that is why you are supposed to flush the system and change the coolant from time to time.

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04-11-2011, 10:09 PM

#19

The Rooster

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Year: 1990 Laredo

Model: Cherokee

Engine: 4.0 Inline 6 Renix

Quote:

Originally Posted by Copytech

I have never seen this in a 4.0 come from the factory with stop leak

.... but you are correct about the coolant and flush...

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04-11-2011, 10:22 PM

#20

jeepboy1990

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Year: 2000

Model: Cherokee

Engine: 4.0

his dad probly does

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04-11-2011, 10:44 PM

#21

The Rooster

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Year: 1990 Laredo

Model: Cherokee

Engine: 4.0 Inline 6 Renix

well do one and come back with the #'s you get...

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04-11-2011, 10:45 PM

#22

Copytech

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Year: 1994

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by The Rooster

I have never seen this in a 4.0 come from the factory with stop leak

.... but you are correct about the coolant and flush...

I have misspoken about jeep, but I know for a fact that Chevy does it, add Dexcool and you have a mess. Been there done that.

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04-11-2011, 10:48 PM

#23

The Rooster

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Year: 1990 Laredo

Model: Cherokee

Engine: 4.0 Inline 6 Renix

Quote:

Originally Posted by Copytech

I have misspoken about jeep, but I know for a fact that Chevy does it, add Dexcool and you have a mess. Been there done that.

I am going to keep that in the back of my mind... my work truck is a GMC.... and when it gets super hot its doesn't play nice... thanks for the tip...

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04-11-2011, 11:31 PM

#24

Lyon

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Quote:

Originally Posted by jeepboy1990

my friend truck keeps overheating new thermostat new water pump.
his father thinks its a pinhole in freeze plug

A freeze out plug would be pissing out antifreeze. Does it have a leak?
I assume the Jeep had the overheating issue before the water pump and t-stat was put in to try to fix it. If it was just to freshen up the parts then you have air in the system.

Check your fan clutch and electric fan and make sure everything is working properly.
Make sure the radiator is not caked up with dirt preventing important airflow.
If you have a leak, fix it. When you're coolant level gets low, it'll overheat.
More serious problems can be in the cylinder head but start with the basics.
If a vehicle was loaded with stop leak, it can cause blockages causing overheating. It tends to block up heater cores as well.