C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

By pass heater core

Thread Tools
 
Search this Thread
 
Old Jul 16, 2017 | 06:15 PM
  #1  
548Smit's Avatar
548Smit
Thread Starter
Heel & Toe
 
Joined: Jun 2017
Posts: 15
Likes: 0
Default By pass heater core

I would like to know how to by pass the heater core as the copit get hot even with heater switch in the off position, some one said to put a shut off valve in the 5/8 s side of the water line, will it cause a problem with the remanding flow of antifreeze. It's a 77 with air.. Also would like to know is it possible to drop a 502 big block in how much work is involved, Any one that does the engine installation in south jesery

Last edited by 548Smit; Jul 16, 2017 at 08:50 PM.
Reply
Old Jul 16, 2017 | 07:47 PM
  #2  
sunflower 1972's Avatar
sunflower 1972
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Sep 2016
Posts: 2,213
Likes: 971
From: Wauconda IL
Default

Search is your friend. There are plenty of posts on this topic.
Reply
Old Jul 17, 2017 | 09:35 AM
  #3  
Street Rat's Avatar
Street Rat
Le Mans Master
Supporting Lifetime
15 Year Member
Conversation Starter
Community Favorite
 
Joined: Aug 2010
Posts: 5,339
Likes: 546
From: Central Texas
Default

Here is one link...

https://www.corvetteforum.com/forums...off-valve.html

And a picture of my set up...


Reply
Old Jul 17, 2017 | 12:50 PM
  #4  
BKbroiler's Avatar
BKbroiler
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
Default

No bypass is needed at all. Get pipe plugs, one for the water pump heater hose connection and one for the intake manifold - two different sizes. Eliminate the hoses entirely. I did this on my 77 years ago.
Reply
Old Jul 17, 2017 | 01:24 PM
  #5  
John 65's Avatar
John 65
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2003
Posts: 5,381
Likes: 416
From: N J
Default

I used the same shut off valve like Street Rat did and it works great.

It's very ez swapping in a BB engine. I put one in my 77. For the most part it's pretty much a bolt in, nothing high tech about it.

Upgrade the cooling system and obviously a different exhaust, along with all the BB brackets and pulleys. Good news is the stock springs, if in good shape and the stock hood works fine.
Reply
Old Jul 17, 2017 | 03:42 PM
  #6  
dochorsepower's Avatar
dochorsepower
Drifting
10 Year Member
 
Joined: Sep 2010
Posts: 1,412
Likes: 50
From: Laguna Niguel California
Default

I've had mine plugged for over 20 years. Saves that heat circulating thru interior.
Reply

Get notified of new replies

To By pass heater core





All times are GMT -4. The time now is 05:04 AM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE