Author Topic: Under Hood Insulation 68 SS  (Read 1984 times)

RAS68

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Under Hood Insulation 68 SS
« on: February 28, 2018, 10:32:41 PM »
I want to ask the forum about under hood insulation for my 68 SS 396 Coupe. I am aware of several threads which address this topic ( see two of them below). However, the first thread is up to 10 years old so I am wondering what is the latest consensus on under hood insulation. Cook_dw tried to revive the question in 2015 but he got only one reply. The second thread has some good tips on clips and some great pictures. I recently bought the molded insulation pad from REM and the Classic Industries original style clips. The quality appears to be very good but I am having a few issues. The pad is very thick and getting the clips to go in is difficult to say the least and some of the clips keep popping out. I have an original GM SS hood so its not the clip hole size. Also, the pad has a green tint to it and it keeps shedding this abrasive green dust from it. I had an original Firebird some years ago with the original insulation ( worn but still there) and I don't remember it having this texture or the green tint. Two of the pictures on thread 2 show black tint pads with the texture I remember and one of the pictures shows the green heavily molded pad. Thread 1 has a recommendation from Jerry M that you should just buy the non molded pad which he says looks more original. However, that recommendation is from 2008. I hope some members will reply on this subject to bring it up to date on the various pads available, how to get the clips to stay in and relate their experiences and give me some recommendations. Thanks.
Allen

http://www.camaros.org/forum/index.php?topic=3331.msg21783#msg21783
http://www.camaros.org/forum/index.php?topic=13891.msg121196#msg121196
'68 SS L34 07C NOR

BULLITT65

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Re: Under Hood Insulation 68 SS
« Reply #1 on: February 28, 2018, 10:49:16 PM »
I have seen the green tint you are referring to. A very nice pad other than that shedding. Would spraying it black keep all the fibers together and look more correct?

I am looking for a original hood insulation for my 69 (Good used) . I think to many guys just toss the old one when buying  new.
1969 garnet red Z/28 46k mile unrestored X77
-Looking for 3192477 (front) spiral shocks 3192851 (rear)
-Looking for an original LOF soft ray windshield
-Looking for original Delco side post negative battery cable part # 6297651AV

RAS68

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Re: Under Hood Insulation 68 SS
« Reply #2 on: March 01, 2018, 03:46:11 AM »
Thanks for the reply Bullitt65 - I may try your idea of painting it lightly. I hope some others will chime in with their experiences on the hood insulation.
'68 SS L34 07C NOR

169INDY

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Re: Under Hood Insulation 68 SS
« Reply #3 on: March 01, 2018, 03:57:20 AM »
I was one of the complainers back then about the diameter of the air cleaner recess not being the correct diameter and the result was insulation rubbing the air cleaner chrome lid top. Keep in mine there is a new molded version that does not replicate the proper contours  they are marketing now. The REM versions I got in the late 90's early 2000's was a very nice color & thin enough that the trouble clips were just a few.
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

69Z28-RS

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Re: under hood insulation pads
« Reply #4 on: March 03, 2018, 04:43:34 AM »
I replaced my original hood pad with a new one purchased thru Chevrolet Parts dept in Apr-May 1976.  It has a 'greenish tint...

Gary
Gary W / 09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe, '70 Mach I 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

169INDY

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Re: under hood insulation pads
« Reply #5 on: March 03, 2018, 10:21:43 PM »
Cowl (04C LOS Z11) Take off in 1995 & Camaro Club Mag.

Jim
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

RAS68

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Re: Under Hood Insulation 68 SS
« Reply #6 on: March 04, 2018, 01:53:40 PM »
Thanks for the reply's, the info and the great pictures. I appreciate it. This is why I come to CRG Forum for my restoration questions - its an excellent resource. If anyone else has pictures of original hood pads please post them. Also if anyone has any experience installing the molded repro pad please post that as well.  I still wish the molded REM pads were more black than green. I sprayed my repro pad with a light dusting of flat black vinyl and upholstery paint and I am much happier with color. It still has a slight green tint but not as much.
Allen
'68 SS L34 07C NOR

Pacecarjeff

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Re: Under Hood Insulation 68 SS
« Reply #7 on: December 22, 2018, 07:19:47 PM »
What did you do about the clips not holding?  I just got my REM pad - -the original clips wound not hold.
this new pad is thicker than the one i got from them 20 years ago. 
Back then the clips were a challenge, but eventually got them all to hold.

I even went and bought a set of the repro CHQ clips, that are advertised as being longer, but they work worse then the originals.  won't grab for even a minute.  For now I have the fat plain ones on - hoping that over time i can switch them one at a time as the pad settles into place.
The color seems a little greener then I remember, but that doesn't bother me.
Any other ideas or recommendations?  anyone modify their original clips in any way?  Duct tape?  lol
thanks.....  J

169INDY

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Re: Under Hood Insulation 68 SS
« Reply #8 on: December 22, 2018, 07:41:22 PM »
Two things I have done;
a) Taking a small jewelers or model train file and dress and accentuate the "Barb" of the clip giving it more "TOOTH" to grab the sheet-metal hole in the hood structure.

b) Took a flap of a matchbook and trimmed and folded it and jammed  it in the split of the retainer to force it (the retainer) to have more spreading force after the retainer is seated in the hood hole.

c) Make sure your insulation punched hole is concentric to the hole in the hood structure so there is NO side or insulation pucker forces trying to unseat the retainer.

d) Gently heat the plastic retainer to soften the "wings" of the retainer to give it some flex and relax some of the unseating forces.


Keep at it and carry spares as needed.

Jim


Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

Pacecarjeff

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Re: Under Hood Insulation 68 SS
« Reply #9 on: December 22, 2018, 08:02:58 PM »
I did cut some of the retainer with an exacto knife, made the flairs a little bigger. That seems to be holding at least the first one did. thanks for the help I probably should have tried that right away.

Mike S

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Re: Under Hood Insulation 68 SS
« Reply #10 on: December 22, 2018, 08:50:52 PM »
Standby.....I'm taking pictures of how to deal with the clips.

Mike
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

Pacecarjeff

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Re: Under Hood Insulation 68 SS
« Reply #11 on: December 22, 2018, 08:56:46 PM »
Only 2 held.  This is very frustrating to say the least.
My polite way of saying.... lol   

Mike S

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Re: Under Hood Insulation 68 SS
« Reply #12 on: December 22, 2018, 09:10:15 PM »
 I've been there and also lost some original clips while driving.
Attached are photos I just took to demonstrate how to shape the clips just enough to easily snap into position.
It works easy if you have a heat gun, but a hair dryer will work good too. You will need a large socket (I used a 34mm socket) and a 1/2" socket on an extension (the extension will save your fingers from getting burnt).
Don't be afraid to get the clip hot enough to be malleable, but don't melt it or overdo the pressing part.

Good luck!
Mike
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

Pacecarjeff

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Re: Under Hood Insulation 68 SS
« Reply #13 on: December 22, 2018, 09:13:09 PM »
Gonna try this right now.  Thank you...  edit: Mike S, this seems to be working very nicely...   :D

oh... FYI,  I did not have any metric tools, so I used a 1-3/8"  seemed to also work just as well...   lol  :P
« Last Edit: December 22, 2018, 10:00:13 PM by Pacecarjeff »

Pacecarjeff

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Re: Under Hood Insulation 68 SS
« Reply #14 on: December 22, 2018, 11:31:33 PM »
Many of them worked just right - but still have 4 or 5 problem holes.  Even the flat top clips won't stay in place.  :(