The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 01-05-2020, 02:43 AM   #1
IronCanine
I'm trying....

 
IronCanine's Avatar
 
Join Date: Oct 2013
Location: Athens, GA
Posts: 1,760
Red Assembly Mark on A/C boxes

On some A/C boxes there was a red paint mark from the factory. At least I interpret it as paint. I have seen many more boxes without a mark than ones with a mark. I believe it to be a Harrison mark, not a final assembly plant mark. But I am speculating. It appears on other GM makes of the era and on vehicles from different assembly plants. The location of the mark can vary. Most all I have seen were at the top front, but I have seen it at the bottom and side. Here are a few pics I've collected from the board at large and from members directly. First two pics are St. Louis trucks, fifth pic is Flint. The fourth pic is from our build and an attempt to recreate this mark. I have had conversations with members about the meaning of this mark and found no consensus. I didn't have much luck noodling around the Corvette, Chevelle or Camaro forums either. F.A.A.Benny would be a good voice to offer an informed perspective on this.

I'm not aware of other threads discussing this and thought a discussion and pics might be of use to someone down the road (and I have an affinity for factory processes/markings). If nothing else maybe we can get another thread with factory underhood A/C pics.
Attached Images
     
__________________
1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076
1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352
1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555

"Sometimes I wonder if zander208 was even real..."
IronCanine is offline   Reply With Quote
Old 01-05-2020, 09:24 AM   #2
BigBird05
Registered User
 
Join Date: Aug 2019
Location: Cheraw
Posts: 210
Re: Red Assembly Mark on A/C boxes

That mark is usually a quality control mark.
BigBird05 is offline   Reply With Quote
Old 01-05-2020, 09:34 AM   #3
IronCanine
I'm trying....

 
IronCanine's Avatar
 
Join Date: Oct 2013
Location: Athens, GA
Posts: 1,760
Re: Red Assembly Mark on A/C boxes

Quote:
Originally Posted by BigBird05 View Post
That mark is usually a quality control mark.
That was my assumption due to the limited frequency.
__________________
1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076
1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352
1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555

"Sometimes I wonder if zander208 was even real..."
IronCanine is offline   Reply With Quote
Old 01-05-2020, 10:39 AM   #4
DeadheadNM
Carpe manana


 
DeadheadNM's Avatar
 
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 9,253
Re: Red Assembly Mark on A/C boxes

Good thread. Here are some Flint assembled 72 K5s w red dot.
Attached Images
   
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547
1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308

Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland
DeadheadNM is offline   Reply With Quote
Old 01-05-2020, 10:56 AM   #5
maverickmk
Senior Member
 
maverickmk's Avatar
 
Join Date: Nov 2019
Location: Altamonte Springs FL
Posts: 305
Re: Red Assembly Mark on A/C boxes

I am no AC expert, but I wonder if it is either the high side or the heat/exit side - ?
__________________
Never let facts get in the way of a good story.

1969 GMC Short Step Side
maverickmk is offline   Reply With Quote
Old 03-23-2020, 09:23 PM   #6
davischevy
Senior Member
 
davischevy's Avatar
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 7,157
Re: Red Assembly Mark on A/C boxes

That is new one for me. I'll probably spend all morning tomorrow out back doing "Research".
__________________
other Larry









I find it ironic that the colors red, white, and blue stand for freedom,...... until they're flashing behind you.
davischevy is offline   Reply With Quote
Old 03-23-2020, 09:47 PM   #7
IronCanine
I'm trying....

 
IronCanine's Avatar
 
Join Date: Oct 2013
Location: Athens, GA
Posts: 1,760
Re: Red Assembly Mark on A/C boxes

That'd be great Larry. Pics if you can.
__________________
1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076
1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352
1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555

"Sometimes I wonder if zander208 was even real..."
IronCanine is offline   Reply With Quote
Old 03-23-2020, 10:21 PM   #8
davischevy
Senior Member
 
davischevy's Avatar
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 7,157
Re: Red Assembly Mark on A/C boxes

Quote:
Originally Posted by IronCanine View Post
That'd be great Larry. Pics if you can.
I have a half dozen original paint Chevelles too. I will look them over too.
__________________
other Larry









I find it ironic that the colors red, white, and blue stand for freedom,...... until they're flashing behind you.
davischevy is offline   Reply With Quote
Old 03-24-2020, 01:49 PM   #9
72swbcamo
Active Member
 
Join Date: Dec 2003
Location: Waterbury, CT
Posts: 571
Re: Red Assembly Mark on A/C boxes

I have two A/C units and half of a housing where the mark would be. One has the red mark, not a nice round circle, more like the red mark in the last picture in the thread. I have no idea what it means but it sure is a great conversation starter. I'm sure someone on this site will come up with the definitive answer.
72swbcamo is offline   Reply With Quote
Old 03-24-2020, 08:40 PM   #10
davischevy
Senior Member
 
davischevy's Avatar
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 7,157
Re: Red Assembly Mark on A/C boxes

The first two pictures are a St Louis manufactured truck.

The third is Fremont built.
Attached Images
   
__________________
other Larry









I find it ironic that the colors red, white, and blue stand for freedom,...... until they're flashing behind you.
davischevy is offline   Reply With Quote
Old 03-24-2020, 09:02 PM   #11
IronCanine
I'm trying....

 
IronCanine's Avatar
 
Join Date: Oct 2013
Location: Athens, GA
Posts: 1,760
Re: Red Assembly Mark on A/C boxes

Thanks for posting Larry. That's a lot of red marks! The last one really looks like a brush stroke.
__________________
1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076
1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352
1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555

"Sometimes I wonder if zander208 was even real..."
IronCanine is offline   Reply With Quote
Old 03-24-2020, 09:08 PM   #12
davischevy
Senior Member
 
davischevy's Avatar
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 7,157
Re: Red Assembly Mark on A/C boxes

The first one does too.
Attached Images
 
__________________
other Larry









I find it ironic that the colors red, white, and blue stand for freedom,...... until they're flashing behind you.
davischevy is offline   Reply With Quote
Old 03-25-2020, 11:32 PM   #13
davischevy
Senior Member
 
davischevy's Avatar
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 7,157
Re: Red Assembly Mark on A/C boxes

I found another one today. This is a 56,000 mile C10 we bought out of the estate of the original owner. Fremont built.
Attached Images
  
__________________
other Larry









I find it ironic that the colors red, white, and blue stand for freedom,...... until they're flashing behind you.
davischevy is offline   Reply With Quote
Old 03-26-2020, 09:46 AM   #14
maverickmk
Senior Member
 
maverickmk's Avatar
 
Join Date: Nov 2019
Location: Altamonte Springs FL
Posts: 305
Re: Red Assembly Mark on A/C boxes

If I understand correctly, the high side of an AC system has the larger hose and is the warm hose. I'm thinking that is why there is red markings near the larger line - ?
__________________
Never let facts get in the way of a good story.

1969 GMC Short Step Side
maverickmk is offline   Reply With Quote
Old 03-26-2020, 11:21 PM   #15
davischevy
Senior Member
 
davischevy's Avatar
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 7,157
Re: Red Assembly Mark on A/C boxes

I found this one on a 72 Monte Carlo on the tube itself.
Attached Images
 
__________________
other Larry









I find it ironic that the colors red, white, and blue stand for freedom,...... until they're flashing behind you.
davischevy is offline   Reply With Quote
Old 03-26-2020, 11:24 PM   #16
davischevy
Senior Member
 
davischevy's Avatar
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 7,157
Re: Red Assembly Mark on A/C boxes

This one is on a low mileage 69 Impala.
Attached Images
  
__________________
other Larry









I find it ironic that the colors red, white, and blue stand for freedom,...... until they're flashing behind you.
davischevy is offline   Reply With Quote
Old 03-27-2020, 09:02 AM   #17
toolboxchev
Registered User
 
Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,130
Re: Red Assembly Mark on A/C boxes

Sone form of QC check mark. Or verification the system is sealed, charged, assembled properly.
toolboxchev is offline   Reply With Quote
Old 03-27-2020, 10:11 AM   #18
IronCanine
I'm trying....

 
IronCanine's Avatar
 
Join Date: Oct 2013
Location: Athens, GA
Posts: 1,760
Re: Red Assembly Mark on A/C boxes

Quote:
Originally Posted by toolboxchev View Post
Sone form of QC check mark. Or verification the system is sealed, charged, assembled properly.
Larry (davischevy) has quite a lot of these in his stash. It seems to me there are a lot more floating around without the mark than with. And we have shown the same mark from different assembly plants. Unlike other assembly marks that we have shown to vary from plant to plant (see any one of our factory markings threads-there are a few on here). Because this mark seems to be consistent from plant to plant on different makes and models...I think it's a Harrison mark. I would think that the box assembly would come from Harrison as a subassembly to be mounted on the truck. Keith Seymore might weigh in as I don't think this assembly process would have changed much on the square bodies (of which he has direct knowledge). But if it is a Harrison mark, then it's got to be QC mark of some sort and not an indication of charge. Now I know that Larry has found red marks on hoses...that could be an indication of charge or factory assembly check. But his examples of this are other GM models-not trucks.
__________________
1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076
1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352
1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555

"Sometimes I wonder if zander208 was even real..."
IronCanine is offline   Reply With Quote
Old 03-27-2020, 10:51 AM   #19
Keith Seymore
Registered User
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 7,933
Re: Red Assembly Mark on A/C boxes

I agree completely, IronCanine.

K
__________________
Chevrolet Flint Assembly
1979-1986
GM Full Size Truck Engineering
1986 - Feb 2019
Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926
My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524
Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/
Keith Seymore is offline   Reply With Quote
Old 03-27-2020, 12:41 PM   #20
davischevy
Senior Member
 
davischevy's Avatar
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 7,157
Re: Red Assembly Mark on A/C boxes

Here is a 62 Impala. The marks are on the hoses at the rear of the compressor and the core support.
Attached Images
    
__________________
other Larry









I find it ironic that the colors red, white, and blue stand for freedom,...... until they're flashing behind you.
davischevy is offline   Reply With Quote
Old 03-27-2020, 07:16 PM   #21
IronCanine
I'm trying....

 
IronCanine's Avatar
 
Join Date: Oct 2013
Location: Athens, GA
Posts: 1,760
Re: Red Assembly Mark on A/C boxes

Quote:
Originally Posted by Keith Seymore View Post
I agree completely, IronCanine.

K
This is one of the great moments of my life. I think I may make a T shirt out of this. Thanks Keith.

Quote:
Originally Posted by davischevy View Post
Here is a 62 Impala. The marks are on the hoses at the rear of the compressor and the core support.
Cool pics Larry. Thanks for posting.
__________________
1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076
1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352
1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555

"Sometimes I wonder if zander208 was even real..."
IronCanine is offline   Reply With Quote
Old 03-27-2020, 09:31 PM   #22
davischevy
Senior Member
 
davischevy's Avatar
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 7,157
Re: Red Assembly Mark on A/C boxes

My 71 Chevelle SS 454. A friend of mine bought this car new.

Edit; This car was built in Arlington, TX
Attached Images
  
__________________
other Larry









I find it ironic that the colors red, white, and blue stand for freedom,...... until they're flashing behind you.

Last edited by davischevy; 03-30-2020 at 09:37 PM.
davischevy is offline   Reply With Quote
Old 03-30-2020, 08:32 PM   #23
FirstOwner69
Senior Member
 
FirstOwner69's Avatar
 
Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,241
Re: Red Assembly Mark on A/C boxes

This is on a '72 currently on Phoenix Craigslist. Looks like a Janesville truck.
https://phoenix.craigslist.org/evl/c...092213597.html
Attached Images
 
__________________
Jim
FirstOwner69 is online now   Reply With Quote
Old 03-30-2020, 09:42 PM   #24
IronCanine
I'm trying....

 
IronCanine's Avatar
 
Join Date: Oct 2013
Location: Athens, GA
Posts: 1,760
Re: Red Assembly Mark on A/C boxes

Great addition Jim. Best one I've see.
__________________
1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076
1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352
1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555

"Sometimes I wonder if zander208 was even real..."
IronCanine is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:28 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com