C1 & C2 Corvettes General C1 Corvette & C2 Corvette Discussion, Technical Info, Performance Upgrades, Project Builds, Restorations

Heater hose size 1962 Corvette

Thread Tools
 
Search this Thread
 
Old 12-20-2015, 12:52 PM
  #1  
ohiovet
Melting Slicks
Thread Starter
 
ohiovet's Avatar
 
Member Since: Feb 2011
Location: Middletown Ohio
Posts: 2,892
Received 167 Likes on 130 Posts
2016 C1 of Year Finalist
Default Heater hose size 1962 Corvette

What is the correct heater hose size for the hose going from the water pump to the heater, pn 3747132?
And the other heater hose from the intake to the heater pn 3760989?
Thanks.
Old 12-20-2015, 12:56 PM
  #2  
Nowhere Man
Team Owner
 
Nowhere Man's Avatar
 
Member Since: Feb 2003
Location: Sitting in his Nowhere land Hanover Pa
Posts: 49,016
Received 6,945 Likes on 4,784 Posts
2015 C2 of Year Finalist

Default

One is 5/8 and the other is 3/4. I always forget which one goes where. But I know the sizes
Old 12-20-2015, 01:02 PM
  #3  
ohiovet
Melting Slicks
Thread Starter
 
ohiovet's Avatar
 
Member Since: Feb 2011
Location: Middletown Ohio
Posts: 2,892
Received 167 Likes on 130 Posts
2016 C1 of Year Finalist
Default

Originally Posted by Nowhere Man
One is 5/8 and the other is 3/4. I always forget which one goes where. But I know the sizes
I agree, but which one goes where?
I think the 3/4" one from the water pump goes through the firewall to the elbow and then is 5/8 to the heater core???
Old 12-20-2015, 01:44 PM
  #4  
Mike67nv
Melting Slicks

 
Mike67nv's Avatar
 
Member Since: Apr 2010
Posts: 2,142
Received 273 Likes on 194 Posts
2018 C2 of Year Finalist
2015 C2 of the Year Finalist

Default

The heater core inlet (lower nipple to intake manifold) gets the 5/8” hose. The heater core outlet (upper nipple to the water pump) gets the 3/4" hose.
Old 12-20-2015, 09:21 PM
  #5  
JohnZ
Team Owner

Support Corvetteforum!
 
JohnZ's Avatar
 
Member Since: Oct 2000
Location: Washington Michigan
Posts: 38,899
Received 1,858 Likes on 1,101 Posts

Default

Originally Posted by Mike67nv
The heater core inlet (lower nipple to intake manifold) gets the 5/8” hose. The heater core outlet (upper nipple to the water pump) gets the 3/4" hose.
Nope. That's true for midyears, but the '57-'62 C1's still had the old-school design with the thermostatic temp valve on the upper (inlet) core pipe from the 5/8" intake manifold fitting, and the lower core pipe was the outlet back to the 3/4" water pump fitting.
Attached Images  
Old 12-21-2015, 04:53 PM
  #6  
DZVette
Melting Slicks
Support Corvetteforum!
 
DZVette's Avatar
 
Member Since: Sep 2001
Location: Aggieland TX
Posts: 2,634
Received 736 Likes on 456 Posts

Default

Originally Posted by JohnZ
Nope. That's true for midyears, but the '57-'62 C1's still had the old-school design with the thermostatic temp valve on the upper (inlet) core pipe from the 5/8" intake manifold fitting, and the lower core pipe was the outlet back to the 3/4" water pump fitting.
Here's an updated photo of the one John posted above.
Dave Z

Old 12-21-2015, 05:51 PM
  #7  
ohiovet
Melting Slicks
Thread Starter
 
ohiovet's Avatar
 
Member Since: Feb 2011
Location: Middletown Ohio
Posts: 2,892
Received 167 Likes on 130 Posts
2016 C1 of Year Finalist
Default

Tom,
You are correct.
But it gets confusing when the pipe coming out of the heater core uses 5/8" hose to the copper elbow and then the hose coming out of the elbow is 3/4" back to the water pump.
Then you have the 3/4" to 5/8"pipe reducer in the block and so on and so forth....
Bruce B

Get notified of new replies

To Heater hose size 1962 Corvette




Quick Reply: Heater hose size 1962 Corvette



All times are GMT -4. The time now is 08:48 PM.