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1981 Radiator / Heater Core Hoses

G

gambit

Guest
I am about to change out all my hoses and wanted some advice before I charge right in there. In reguards to the heater core..... I cant see where the heater hose connects to, can I do it from the engine compartment or do I need to get to them from inside the car to replace the hoses? I am going to replace the hot water shut off valve as well. There is a piece of metal pipe about 6 inches long in the middle of the hose from the water pump to the heater core, I think its to keep it from touching the headders and melting, should that be attached to something? its just kind of floating aroudn now, with nothing to attach it to anywhere. Any other ideas or comments before I start?
 

bill81vette

Moderator
Joined
Jan 17, 2004
Messages
4,272
Location
Troy,NY
Corvette
1981 dark blue metallic
I changed a couple of mine last year.I remember the metal pipe,but I don't know its purpose.the heater hoses connect under the right side of the firewall.I used a sharp utility knife to cut the old ones off as to not pull on the heater core when they come off,as they have probably been on there for 25 years!!!
 
Joined
Apr 29, 2001
Messages
2,141
Location
Rio Rancho, NM
Corvette
1981 HD Suspension; ZN1 Option
In the L81, the metal pipe near the water pump is loosely shaped like a "Z" or stretched "S", and it is used for routing the hose around the A-C compressor bracket. It also has a metal tab with a hole, so that it can be secured to the pivot bolt for the compressor.

I am not aware of another metal pipe for these hoses...:confused

GerryLP:cool
 

6880 Mike

Well-known member
Joined
Jun 30, 2006
Messages
2,723
Location
The Bluegrass State
Corvette
1968 convertible; 1980 L-82
...In reguards to the heater core..... I cant see where the heater hose connects to, can I do it from the engine compartment or do I need to get to them from inside the car to replace the hoses?...

They will be easier to see from underneath. My advice is not to tug on the hoses on the heater core end. They tend to stick. If you tug them, you run the risk of breaking the tubes loose and will create a heater core leak for yourself. Remove the clamps, then cut the old hoses away.

While you're under there, make sure the AC evaporator case drain hole is open.

:)
 

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