1968 Plymouth GTX

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PostPosted: Sat Jan 05, 2019 4:21 pm
'68 Coronet R/T wrote:Sprayed more epoxy today.
Rotors:
Upper Control Arms and hardware:
Steering Knuckles:
Hood:
Hood support structure:


Hey 68, I have a couple more of my typical rookie questions;

1) On those pieces like the Steering Knuckles, rotor and control arms, is the epoxy going to be the final finish or will you shoot some SS or BC/CC?
2) At the areas of your hood where you welded in the hood inner support plates, did you grind to bare metal first, then weld, then re-epoxy?
Sent by the random thoughts from the voices in my head...

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PostPosted: Sat Jan 05, 2019 5:01 pm
Control arms, steering knuckles, suspension, rotors, calipers, rear axle, driveshaft and anything that is under the car and not exposed to direct sunlight will get two coats of black epoxy and that's it.

When welding I epoxy both sides and then use a wire wheel on a pneumatic grinder and clean up the spot and the edges of the hole where I will weld.

After welding I coat with more epoxy, either by spraying or small paint brush.
1968 Coronet R/T


ACTS 16:31

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PostPosted: Mon Jan 07, 2019 9:28 pm
Needed to dismantle the brake pedal assembly:
Brake Pedal Assembly.JPG


Blasted and epoxied then reassembled:
Brake Pedal Assembly in Epoxy 1.JPG

Brake Pedal Assembly in Epoxy.JPG


Working on the K-frame which is a real mess from years of oil leakage and dirt. Hope to get it in epoxy tomorrow. Also working on the disc brake calipers. Turns out they are from a 1975 Dodge Dart but if I can make them work I will.

Upper control arms are ready to be rebuilt:
Upper Control Arms in Epoxy.JPG


Steering knuckles ready to be installed:
Steering Knuckles in Epoxy.JPG


Still waiting on the sway bar weld-on brackets to arrive. Guess they were back ordered. Also waiting for the sealer so I can put the hood back together.
1968 Coronet R/T


ACTS 16:31

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PostPosted: Tue Jan 08, 2019 9:00 am
Ground off the old welds and removed what was left of the sway bar brackets:
Lower Conrtol Arm Brackets removed.JPG


Decided to dismantle the disc brake calipers:
Disc Brake Calipers.JPG


The piston wells looked pretty bad but will clean up with a hone after de-greasing.
Disc Brake Caliper Piston Well.JPG


I will reinstall the pistons, air bleed screw and banjo bolts prior to sandblasting the housing. These parts will be replaced when rebuilding the calipers anyway.
1968 Coronet R/T


ACTS 16:31

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PostPosted: Wed Jan 09, 2019 6:43 pm
K-Frame and calipers in epoxy:
K-Frame in Epoxy.JPG

Brake Calipers in Epoxy 1.JPG


Reassembled the hood using 3M 4274 Duramix NVH sealer. Clamped it together for now and after the 24 hour cure time I will spot weld it together.
1968 Coronet R/T


ACTS 16:31



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PostPosted: Wed Jan 09, 2019 9:29 pm
Pics after spot welds Please

Curious Do you spot weld through the adhesive?
There are some on Market you do but I believe you do spot welds before it cures.
Dennis Barnett
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.

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PostPosted: Wed Jan 09, 2019 11:34 pm
This one says you can weld through the adhesive, however I did not put adhesive in the weld areas.
I clean the spots of any primer before spot welding.
1968 Coronet R/T


ACTS 16:31

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PostPosted: Thu Jan 10, 2019 9:09 pm
Spot welded the hood back together.
Hood Spot Welds.JPG

Hood Spot Welds 1.JPG


I was having a hard time getting the welder set to produce the desired plug weld. Finally flattened a piece of copper pipe and clamped it behind the flange area to use as a heat sink. That helped immensely.

Ran a DA over the hood to reveal low spots. The black epoxy works good for this as the low spots retain their shine.
Hood Epoxy Sanded 1.JPG


Went a head circled all the trouble areas:
Hood Low Spots Circled 1.JPG


The following I call my disaster area. Someone had taken a body hammer and used the pick end to "cave and pave" as I call it.
I started with a hammer and dolly raising the low spots which of course stretched the metal into a high spot.
This will be a good spot to learn how to use my new shrinking disc and slap hammer. :goodjob:
Hood Diaster Area.JPG
1968 Coronet R/T


ACTS 16:31



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PostPosted: Sun Jan 13, 2019 12:07 pm
I LOVE My Shrinking Disk! Absolutely Favorite tool in my arsenal besides my New Tig followed closely by my new my New Plasma cutter I just Fired up for the first time, day before yesterday. Its been sitting there all set up for a couple months now just got around to trying it out WOW! It Rocks! Was kinda afraid of it lol. Sliced through some 1/4' steel Square tube for the Rotisserie like Soft Butter!


On Your Spot welds
Are you Plug welding with a Mig or are you using an actual Spot welder?
I Have a real Spot welder Its a small 220/110 unit I got for Xmass several YEARS ago actually a Long time ago now, I still haven't ever tried it out But I will soon on current project. The Tongs are Kinda short like to find a Good long set for it.
Dennis Barnett
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.

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PostPosted: Sun Jan 13, 2019 4:20 pm
My MIG has a selector for Spot/Continuous/Stitch cycles.

I was using .023" wire because of the thickness of the metal but the holes made by the spot weld cutter are around 3/8" diameter and it takes 3-4 second spot weld setting to fill those holes.

Maybe I should have use the .035" wire?
1968 Coronet R/T


ACTS 16:31
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