Water hose to heater core at the firewall broke

STRPUZZLE

MEMBER
1999 CHEVROLET SILVERADO
V8
4WD
AUTOMATIC
158,966 MILES

The water hose to heater core at the firewall broke. It has a plastic fitting that is attached to the firewall tube. How do you take this piece off?

Saturday, July 25th, 2009 AT 4:04 PM

4 Replies

SONOBOB

MEMBER
3 POSTS

I had to use an AC/fuel line disconnect tool that I picked up as a set of six at auto zone or advance auto. Can't recall the exact price, but it wasn't too expensive...$10 or so.
Here's a pic of the set... this guide will show you how.

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

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

+1

Monday, August 3rd, 2009 AT 7:02 PM

JJAMONTAN

MEMBER
2 POSTS

Did you figure out how to get this part off? I have the same problem with my 1999?

Was this

answer

helpful?

Yes

No

Sunday, June 13th, 2010 AT 8:09 PM

BOTIBILL

MEMBER
1 POST
1984 CHEVROLET SILVERADO
5.7L
V8
2WD
AUTOMATIC
75,000 MILES

I have a shut off valve in the small hose and I want to put a ball valve shut off in because the old one drips a little water. Is the small heater hose the inlet and is that the one I should put the shut off valve in? And what size is the small heater hose usually? I’m thinking 5/8 inch. Any help would be appreciated.

Was this

answer

helpful?

Yes

No

Friday, April 30th, 2021 AT 4:37 PM (Merged)

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

Yes, The heater hose size is 5/8. The inlet to the heater core is the hose coming off the water pump. The return line from the heater core exits to the intake manifold. Hope this helps and thanks for using 2CarPros.

Danny-

Was this

answer

helpful?

Yes

No

Friday, April 30th, 2021 AT 4:37 PM (Merged)