Heater hoses

MOONDOG321

MEMBER
1999 CHEVROLET TAHOE
V8
2WD
AUTOMATIC
165,000 MILES

My cooling system has been slowly losing coolant. On heater hose that attaches to block just behind the alternator there is a lot of crud/dried red junk at the connection. So, assuming this is leaking how do I replace this hose? It has a weird connection. Is it some type of quick-connect fitting?

do i need to replace the hose that has the male end attached, the female connector threaded into the block or both to stop the leak?

5 Replies

MMPRINCE4000

MECHANIC
8,548 POSTS

Yes it is a quick connect fitting.

There are two types, one has plastic tabs, you squeeze them and connection pulls apart. This may take some work, because it looks to be pretty crudded up. If metal connection, you can buy an inexpensive special tool at any auto parts stores to remove.
Most cooling system are the plastic type. I would also flush the cooling system and get rid of that Dex-Cool (my opinion). Prestone, Peak and auto parts store brands can be used, they mix with any color, all makes, all models. This guide can help you fix it

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

Please let us know what you find. We are interested to see what it is.

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Friday, May 29th, 2009 AT 9:03 AM

MOONDOG321

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3 POSTS

Do I need to replace the hose with the male end or the female connection that threads into the engine?

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Sunday, May 31st, 2009 AT 12:44 PM

MMPRINCE4000

MECHANIC
8,548 POSTS

There is an "O" ring that provides the acutal seal. I would clean it up and inspect the O ring.

You can replace the O ring if you think it needs it and the plastic or metal ring should also be replaced.

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Monday, June 1st, 2009 AT 7:19 AM

ABDO.JBEILY

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1 POST
1998 CHEVROLET TAHOE

Hi i have something connected to the heaterHOSE

sometime when i turn the suv on i can see drops of water going out so i wanna know if it is normal, i have checked the hoses connection and they are good no leakage thanks .

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Friday, February 19th, 2021 AT 8:36 PM (Merged)

TJOE20

MEMBER
1 POST

I actually just replaced the part you're talking about the other day. It's called a heater control valve, I picked one up at NAPA for $14.99. It stopped that from leaking and isn't to hard to install.