Heater core replacement

ANONYMOUS

MEMBER
1984 JEEP CJ7
125,000 MILES

I have 84 cj7 with 258 6cyl how are the heater vacuum hoses to be routed? I also need to know how to change the heater core. Thanks in advance.

Sunday, February 3rd, 2013 AT 2:01 AM

7 Replies

CJ MEDEVAC

MECHANIC
11,004 POSTS

Here are the heater vacuum hoses with the electrical diagrams as well to help you see how the system works and it shows how to do a heater core. Check out the guide to walk you through the steps and the diagrams below.

https://www.2carpros.com/articles/replace-heater-core

and

https://www.2carpros.com/articles/replace-heater-hoses

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

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Sunday, February 3rd, 2013 AT 3:07 AM

CRUSER

MEMBER
1 POST

Medic,

Thanks for the post worked great I love this site.

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Sunday, August 11th, 2013 AT 12:12 PM

CJ MEDEVAC

MECHANIC
11,004 POSTS

Good to hear, please use 2CarPros anytime we are here to help.

Cheers

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Sunday, August 11th, 2013 AT 2:04 PM

MCCAND41

MEMBER
3 POSTS
1986 JEEP CJ7
4.8L
6 CYL
4WD
MANUAL
58,000 MILES

Just replaced heater core on my jeep. The hoses had been bypassed by previous owner and I need to know which hose connects to which tube on heater core?

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Wednesday, December 12th, 2018 AT 10:05 AM (Merged)

WRENCHTECH

MECHANIC
20,761 POSTS

I beg to differ here.
It definitely does matter which direction the coolant flows. It needs to enter at the lowest point and exit from the highest. Otherwise you will not keep the air out of the heater core and air doesn't provide heat. If coolant is pushed up from the bottom, it will push any air out the top and keeps the core full.