72 Dash Question - Chevelle Tech
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post #1 of 22 (permalink) Old Jan 1st, 20, 7:08 PM Thread Starter
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John
 
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72 Dash Question

Happy new year everyone!! Working on a 72 Malibu, moved the sweep dash out far enough to replace the insulation, clean test the heater core, fix a crack and a few other things and when moving the dash out I found a cushion (similar to a deck lid cushion ) between the instrument panel reinforcement assy. and the steering column mount. Found nothing in the assembly manual UPC 1A2B or UPC 9C on it. Anyone else seen these installed at that location? Pictures attached. Any help would be great.

Thanks
John
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post #2 of 22 (permalink) Old Jan 5th, 20, 1:37 PM Thread Starter
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John
 
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Re: 72 Dash Question

Ok... well maybe someone wedged it in there to stop a squeak or rattle. It didn't have the screw installed that's directly above the column.
Another question, has anyone used an epoxy type glue or any glue for repairing dash cracks with any success?? I have one directly below the radio on the right side. Vertically about 4" long, up from one of the pop rivets that I was going to try to clamp and glue on the back side.

Thanks
John
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post #3 of 22 (permalink) Old Jan 5th, 20, 3:26 PM
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I’ve used 2part epoxy right fix cracks and also body filler to fix some imperfections. Then paint with SEM landau black
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post #4 of 22 (permalink) Old Jan 5th, 20, 4:07 PM Thread Starter
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Re: 72 Dash Question

Thanks Brian, I'll give it a shot. Yours turned out nice!!
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post #5 of 22 (permalink) Old Jan 5th, 20, 4:40 PM
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Re: 72 Dash Question

Quote:
Originally Posted by 72soft-top View Post
Iíve used 2part epoxy right fix cracks and also body filler to fix some imperfections. Then paint with SEM landau black

Not on the Chevelle but I also have had extremely good luck with the two part syringe type epoxy made specifically for plastic on dash boards, plastic door panels etc. I have bought it in both cream color and black if you're concerned about it showing up somewhere it shouldn't. Brian, your dash looks VERY nice by the way. Some day mine needs that treatment.
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post #6 of 22 (permalink) Old Jan 5th, 20, 10:42 PM
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Re: 72 Dash Question

JB Weld.

Valley out the crack on the back side and fill with JB. Since its the back you don't have to put it on thin.

You can do things like rough up the plastic with some rough grit sand paper, dremel etc.

For thicker plastic use a drill and grind small holes into the plastic so the JB runs into the holes, this helps strengthen the crack and helps with longevity.

For a crack on the grain, take a piece of aluminum foil and rub the grain into the foil, put some JB on the break and lay the foil over the JB, if you do it with some practice you can fix things like gauge pods, consoles etc. I had a plastic container that had a grain to it with a pool ball size hole. Put foil on the back side reinforced with some cardboard. On the front I filled with JB and a piece of foil that had the grain rubbed onto it. After it dried I peeled the foil off and the only issue was the slight lip around the outside of the hole where the jb had built up. I used my dremel to smooth out the line and it was unnoticeable after some flat gray.

Aluminum Foil has 2 sides also...each are different.

The grill on my Chevelle is 2 pieces...JB them together...repaint.


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post #7 of 22 (permalink) Old Jan 19th, 20, 9:44 PM Thread Starter
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Re: 72 Dash Question

Going through all the lights, the clock, heater sw, e-brake sw, and everything else that doesn't work, I decided to just pull the dash. Found that the 1st, 2 wire twist bulb socket feeding the rest on the circuit strip had a bad connection that turned out to be a tarnished crimp terminal so going through terminals now. I got stuck on removing the 2 light clusters (Idiot lights). Did a search and found where HKalin and RealRed70 explained how to pull them. If you guys read this Many Thanks. Anyone know what to replace the foam gasket with that's disintegrated around the bulbs? The crack I spoke of earlier is bad enough that I'm tempted to drill the end to help stop it. So I'll probably do as Shane suggested with the tin foil on the out side to help it blend.
Anyway thanks again for the help and dam it's cold out....-4 this morning.

John
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post #8 of 22 (permalink) Old Jan 20th, 20, 8:00 PM
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Brian
 
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Now that you have the entire dash out, I would remove everything and paint the dash. It’s not hard and will look great when you’re done.

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post #9 of 22 (permalink) Old Jan 20th, 20, 10:27 PM Thread Starter
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Re: 72 Dash Question

I started gutting it tonight. Down to the last thing...the speedo. Pulled the screw in the lower right hand corner and the 2 in the back but I still seam to be missing one. So research time...I've got some plastic repair to do where 2 tabs are cracked on the lens and one barrel post is toast. Not sure yet about the foam gasket other than to see if MSC/Grainger might have some flat sheet stock to make some out of. Once I get it gutted, I can clean it and then see how bad it is, repair all of it. Then like you mention Brian, probably paint the grain areas...rabbit hole keeps getting deeper!!!

Thanks
John
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post #10 of 22 (permalink) Old Jan 20th, 20, 11:46 PM
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Quote:
Originally Posted by LTJOHN View Post
rabbit hole keeps getting deeper!!!
Welcome to the classic car restoration club. It a fun hobby and extremely rewarding when you get the project done. Problem is.... all these rabbit holes are restoration projects. Ask questions often and we can help.

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post #11 of 22 (permalink) Old Jan 22nd, 20, 3:02 AM
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Re: 72 Dash Question

Any images of pulling the clear sweep clear plastic lens off?
Any thoughts on replacing the normally crumbled gasket when putting the lens back on?

Be careful with these parts. I don't think they are available as repro parts.

* Sweep lens.
* Idiot light thin plastic color lenses (like brakes, gen, turn signal etc).
* Dash gauge light on the drivers side that has the two wires that power the first light and related circuit board to power the next 4 lights.
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post #12 of 22 (permalink) Old Jan 22nd, 20, 3:41 AM
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Re: 72 Dash Question

Here is an option that I have not used.

ShiftWorks has a tach that replaces the clock for sweep dash.
https://shiftworks.com/collections/g...ibu-tachometer.
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post #13 of 22 (permalink) Old Jan 22nd, 20, 6:53 PM Thread Starter
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Re: 72 Dash Question

Quote:
Originally Posted by Old Bear View Post
Any images of pulling the clear sweep clear plastic lens off?
Any thoughts on replacing the normally crumbled gasket when putting the lens back on?

Be careful with these parts. I don't think they are available as repro parts.

* Sweep lens.
* Idiot light thin plastic color lenses (like brakes, gen, turn signal etc).
* Dash gauge light on the drivers side that has the two wires that power the first light and related circuit board to power the next 4 lights.
I haven't been able to find many parts for the sweep dash. NO speedo lens, colored lens and the only 2 wire twist plug for the circuit strip I could find was on e-bay made in China. The 2 main vendors for dash wiring aren't willing to get what they have up for sale. Very limited stock is how they put it.
I did a search where (Hank) HKalin and RealRed70 explain how to pull the indicator (Idiot) lights. On the pic below you'll see 3 plugs that were pulled from the unused end sections of the lights. I used a box knife blade to carefully pry them out. That gives you access to 3 screws that hold the light echelon in, then the 3 screws on top and the main lens can be removed.
The foam gasket material I'm still looking for. I can find foam at a box store but the thickness is another thing.
Once I got it gutted I found where someone bent the frame which probable caused the crack. Probable when putting some junk blue light special radio in.... Oh boy!!
Sorry about the upside down pic.

John
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post #14 of 22 (permalink) Old Jan 22nd, 20, 7:06 PM Thread Starter
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John
 
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Re: 72 Dash Question

Quote:
Originally Posted by Old Bear View Post
Here is an option that I have not used.

ShiftWorks has a tach that replaces the clock for sweep dash.
https://shiftworks.com/collections/g...ibu-tachometer.
I spotted one of those on Classicchevrolet.com site. Haven't seen anything on how well they hold up or work though. I was going to take the clock apart, clean the contacts and test it. Then go on from there.

John
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post #15 of 22 (permalink) Old Jan 22nd, 20, 8:10 PM
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RonO.
 
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Re: 72 Dash Question

On some dash fixes, this mesh along with a 2 part epoxy works out great.
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