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Author Topic: 68 Air Conditioning -Sealing  (Read 25735 times)
68L30
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« Reply #15 on: March 19, 2007, 08:12:59 PM »

The pic I posted is of my unrestored seal... taken 25 yr. ago.....I can't even see what I posted...LOL.I'm a car guy not a computer guy...I have another pic showing the holes. Both pics were taken showing the whole engine compartment after adding some chrome and headers.I cropped out everything else and tried to just show what is relevent here..I sent you a PM  lakeholme  ....


Steve
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lakeholme
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« Reply #16 on: March 20, 2007, 09:04:49 AM »

Steve and I are emailing back and forth.  Looks like he has an exception to what we had figured out before.
BTW, if anyone thought I was negatively questioning Steve from my post above, that was completely not my intention!  I'm actually excited about him being able to document an exception... That's one of the great things about CRG!  Grin
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Phillip
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Planning 2016 Sentimental Tour, AACA (and restoring a 40 Buick Special for it)
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"Charlotte AutoFair, presented by the Hornets Nest Region, AACA, is the largest and greatest Collector Vehicle Event in the Southeast USA."
68L30
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« Reply #17 on: March 20, 2007, 11:28:46 AM »

We'll get it figured out....What is the build date of your car? I have seen lots of other 68's with the hole and always thought they should be there.....Good discussion..



Steve
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lakeholme
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« Reply #18 on: March 20, 2007, 11:34:50 AM »

Steve,

My car is a 12D.  It does not have the holes.

Note Ed's post above about the 68 (and 69) AIM.  That's what I have been going by.
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Phillip
HNR-AACA, Senior Master
Planning 2016 Sentimental Tour, AACA (and restoring a 40 Buick Special for it)
AACA Southeastern Division Spring Meet Chair
"Charlotte AutoFair, presented by the Hornets Nest Region, AACA, is the largest and greatest Collector Vehicle Event in the Southeast USA."
68L30
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« Reply #19 on: March 20, 2007, 06:45:20 PM »

Ok......I did some digging and found a TSB on 68 Camaro air problems..

68-T-73
Ia
Dec.20,1968

Subject..

A/C hoses rupturing or blowing off 1968 Camaro

"Excessive compressor head pressures due to high engine compartment air temp has also been noted as a contributing factor to hose failure.Special under hood sealing at the radiator support to improve air displacement has been released for production (effective 6-19-68) and for service."


Steve
« Last Edit: March 20, 2007, 06:58:36 PM by 68L30 » Logged
68L30
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« Reply #20 on: March 20, 2007, 06:53:39 PM »

Another interesting point is the installation of the seals to the baffles.They were stapled at the factory,but this TSB mentions installation with #8-32 screws....This would confirm the retro fit of the seals on 68 Camaros built before  ?? (what date)..


i'm convinced GM was aware of the problems with underhood temps and was tring to come up with solutions during the 68 production...I also believe an adheisive backed rubber weather strip was not a very good solution...Just look at where it is located...and the heat factor + the use of glue..There also is not one other similar seal used on a 68 without some form of fastener of mounting channel... Clips were added but the question should be when.....6-19-68 is a pretty good start for now..IMHO..Thoughts?


Steve   
« Last Edit: March 20, 2007, 06:56:26 PM by 68L30 » Logged
lakeholme
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« Reply #21 on: March 21, 2007, 09:08:24 AM »

Great info., Steve!

I'd say 6-19-68 could be the starting point of planning for pins.  Could have been implemented by your build date...
I also note that the TSB was issued a year after my car was made... 

John and Ed, if you see this, I'd love to know what you think.
« Last Edit: March 21, 2007, 10:00:23 AM by lakeholme » Logged

Phillip
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Planning 2016 Sentimental Tour, AACA (and restoring a 40 Buick Special for it)
AACA Southeastern Division Spring Meet Chair
"Charlotte AutoFair, presented by the Hornets Nest Region, AACA, is the largest and greatest Collector Vehicle Event in the Southeast USA."
Ed Bertrand
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« Reply #22 on: March 21, 2007, 12:52:24 PM »

I'll let John comment, but this sounds reasonable. Since the last recorded change to the 1968 AIM was on June 3rd, 1968, and the Bulletin references June 19th, 1968, it apprears that it just missed making the AIM by 2 weeks.

I'd like to see if we have other 1968 A/C cars in the database built after the June 19th reference with the clips. I don't know how long it takes from the release of a bulletin to manufacturing actually starting the process, but in this case, there's an actual date so I would say it probably occured as written.

Kurt, do we have any other late cars with A/C and the clips?

John, your comments please...

Ed


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Ed Bertrand
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« Reply #23 on: March 21, 2007, 01:47:41 PM »

I just went back to my (limited) database and found the following:

1. Los Angeles car (VIN 124378L347058). Built in mid to late July. Does NOT have the seal or the holes for the clips (picture 1 below).

2. Norwood car (VIN 124378N463076). Athough the seal's in the way, it appears to have the clips (picture 2 below).

3. Norwood car (VIN 124378N480620). Holes for the clips (picture 3 below).



Picture 1 - Los Angeles Car (VIN 124378L347058):





Picture 2 - Norwood car (VIN 124378N463076):





Picture 3 - Norwood car (VIN 124378N480620):



Ed
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lakeholme
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« Reply #24 on: March 21, 2007, 03:01:10 PM »

Ed,

So are the Norwood #2 and #3 cars you listed above, May and June build dates?  If that's true, that pulls the date of the clips up till May?

BTW, thanks for the clip hole pictures.  It helps to know what you're looking for.

By any chance could someone post a picture of the clip?
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Phillip
HNR-AACA, Senior Master
Planning 2016 Sentimental Tour, AACA (and restoring a 40 Buick Special for it)
AACA Southeastern Division Spring Meet Chair
"Charlotte AutoFair, presented by the Hornets Nest Region, AACA, is the largest and greatest Collector Vehicle Event in the Southeast USA."
Ed Bertrand
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« Reply #25 on: March 21, 2007, 03:16:02 PM »

Phil,

No, number 2 and 3 are from July, 1968. Unfortunately, I don't have any Norwood A/C cars from June.

The number 1 picture (Los Angeles) is also a July car, but note that there are no holes for the clips (and no seal itself). This is the only LA car I have with A/C for July. None for June either so I have VERY limited information.

I'm hoping Kurt has more and can chime in here.

Ed
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mark x22
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« Reply #26 on: March 21, 2007, 07:00:10 PM »

this is on a 1969 , the radiator to core support seals i made . if you buy a new top seal use a paper punch to put the holes in ,a razor might leave a corner that can tear .if you look at an original 1967 core support they dont have the dimples for the clip holes .




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lakeholme
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« Reply #27 on: March 22, 2007, 08:40:55 AM »

Mark,
I have ordered a new core seal. Now, I'm trying to decide about clips or tape.  With my 68 12D build date, the AIM says tape.  I really appreciate the clip pictures, however.

Are the shroud seals you made door insulation?  How are they attached?  Glue or tape?  How's that working?
We've got a question if the tape worked well with the heat.

Thanks for the input...
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Phillip
HNR-AACA, Senior Master
Planning 2016 Sentimental Tour, AACA (and restoring a 40 Buick Special for it)
AACA Southeastern Division Spring Meet Chair
"Charlotte AutoFair, presented by the Hornets Nest Region, AACA, is the largest and greatest Collector Vehicle Event in the Southeast USA."
JohnZ
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« Reply #28 on: March 22, 2007, 10:45:18 AM »

Ed, the third car in your post above must have originally had the seal and had it removed at some point; those clip holes were "drill at assembly", and they wouldn't have gone to the trouble of manually drilling the nine holes without also installing the seal.
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mark x22
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« Reply #29 on: March 22, 2007, 05:19:07 PM »

i looked in the yellow pages for foam rubber and found a place that sells it in flat sheets and just cut to fit .it has a skin on one side.  i used black 3M weather strip glue, you can get it with self adhesive backing . its been on for years . does you core support have the dimples ?  if you drill holes watch out for the condenser underneath them .
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