overheating! ><

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Oct 19, 2010 | 08:56 AM

#16

djb383

CF Veteran

Joined: Nov 2009

Posts: 8,172

Likes: 17

From: The Republic of TEXAS

Year: 1998

Model: Cherokee

Engine: 4.0L HO

Quote:

Originally Posted by majormatt125

ill try that. its not quiet 50/50

A good 16psi rad cap plays a much larger role in boil-over protection than antifreeze/coolant. Antifreeze/coolant is mainly for freeze protection, corrosion/rust protection and water pump lubrication.

Can OBD-I systems be scanned for coolant temp?

Oct 19, 2010 | 10:51 AM

#17

xj35s

Junior Member

Joined: Sep 2010

Posts: 46

Likes: 0

From: Dahlonega, GA

Year: 1992

Model: Cherokee

Engine: 4.0L

If you dont use your a/c get rid of the condenser. I did that and my overheating problems were solved. The radiator now has unrestricted airflow.

Oct 19, 2010 | 02:52 PM

#18

n_a_i_w

Senior Member

Joined: Jun 2010

Posts: 695

Likes: 0

From: Arizona

Year: 2000

Model: Cherokee

Engine: 4.0

replace the radiator cap. if its not working right you will overheat..

Oct 20, 2010 | 01:59 PM

#19

majormatt125

Thread Starter

Member

Joined: Sep 2010

Posts: 217

Likes: 0

From: russell kansas

Year: 1993

Model: Cherokee

Engine: 4.0 inline 6

ill try that today

Oct 20, 2010 | 03:27 PM

#20

XJDavid

Junior Member

Joined: Sep 2010

Posts: 35

Likes: 0

From: Round Rock, TX

Year: 2001

Model: Cherokee

Engine: 4.0

Maybe check the belt layout. If the water pump is turning backwards you'll have overheating issues.

Oct 20, 2010 | 05:07 PM

#21

majormatt125

Thread Starter

Member

Joined: Sep 2010

Posts: 217

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From: russell kansas

Year: 1993

Model: Cherokee

Engine: 4.0 inline 6

Quote:

Originally Posted by djb383

A/C condenser clear/clean, not plugged with mud/bugs/trash? Verified overheating with a gauge other than the factory dash gauge? New t-stats have been known to be bad, rarely. Like rich said, test it.

FWIW, here's pics of a 180 t-stat closed and wide open at 195.

i tested my old one and got boiling water. it didnt appear to be opening

Oct 20, 2010 | 05:08 PM

#22

majormatt125

Thread Starter

Member

Joined: Sep 2010

Posts: 217

Likes: 0

From: russell kansas

Year: 1993

Model: Cherokee

Engine: 4.0 inline 6

Quote:

Originally Posted by XJDavid

Maybe check the belt layout. If the water pump is turning backwards you'll have overheating issues.

belt layout is fine

Oct 20, 2010 | 05:08 PM

#23

majormatt125

Thread Starter

Member

Joined: Sep 2010

Posts: 217

Likes: 0

From: russell kansas

Year: 1993

Model: Cherokee

Engine: 4.0 inline 6

i just changed the t stat. ig ill find out tn if it over heats.

Oct 20, 2010 | 07:23 PM

#24

kemjeep

Member

Joined: Jul 2010

Posts: 182

Likes: 1

From: nanticoke pa

Year: 2000

Model: Cherokee

Engine: 4.o

X2 on the radiator cap

Oct 22, 2010 | 10:38 AM

#25

majormatt125

Thread Starter

Member

Joined: Sep 2010

Posts: 217

Likes: 0

From: russell kansas

Year: 1993

Model: Cherokee

Engine: 4.0 inline 6

its still getting hot and everything is new. could it be a head gasket?

Oct 23, 2010 | 06:10 AM

#26

a737mech

Junior Member

Joined: Apr 2010

Posts: 87

Likes: 0

From: SC

Year: 1996

Model: Cherokee

Engine: i6 4.0

How many miles? Or you the original owner? If not how often did the previous owner change oil? Could be oil sludge in motor cloging oil pump. Remove rocker cover see if oil is getting to head this happened to me.