How To Restore and Detail an Original Gauge Cluster

[theastronaut]

After restoring a couple gauge clusters I had a request for a "how-to" post to show the process and products I use. The cluster I'll be restoring is from a '66 parts truck, and I'll be adding a tach and air gauge. The block off plates are missing, which is okay since they'll be replaced by the tach/air gauges.



This is the starting point. The lens will need to be replaced since it's scratched and the lettering is faded, and one of the harness wires is cut.






I took these pictures to have a reference for reassembly. This way I know that all of the wiring goes back exactly where it should without guessing.











This is one of my finished clusters.

[theastronaut]

To disassemble the cluster, remove the screws that hold the individual gauge mounts and pull the units out.




There are 7 screws around the outside edge of the cluster, they hold the bezel, intermediate plate, and lens together.




There are three screws that mount the speedometer, remove them and keep the rubber grommets- they're not reproduced.




Note that there are rubber cushions around the edge of the lens that will need to be reinstalled to prevent rattles.

[theastronaut]

To restore the housing, I use 80 grit glass beads to strip the old clear coat from the outside and the green paint from the inside. After all the old paint is off, I change out the glass beads in the cabinet to new beads and lightly blast over the outside for an even, polished finish. The outside will be cleared only, so don't let the housing scrape against the inside of the blast cabinet- any marks will be visible. Don't touch the housing with bare hands or it will rust under the clear coat.






Clean the housing with compressed air only, then spray a couple coats of satin clear. I like Krylon satin clear.








After the outside is completely dried, mask it off and spray the inside green. I use Krylon Satin Jade.

[theastronaut]

For the bezel, I smooth the rough edges with a DA sander then bead blast it and prime it with Rustoleum high build. On some clusters the center bottom mounting hole area is warped and needs to be straightened.






Guide coat the primer and wetsand with 500-600 grit until all the guide coat is gone. Use a grey scuff pad to smooth the primer in the ridges.




I use SparVar S120 Silver paint. Silver is correct for 1966 bezels. This is what it will look like with smoothed edges after priming and painting. The original edges are very rough from the casting process.




64-65 bezels were painted satin black.

[theastronaut]

To restore the individual gauges, remove the screws and nuts that mount the gauges onto the gauge mount.




Remove one at a time so you can keep up with which parts go with which gauge.






Put the screws/terminals back on the gauge so they don't get lost.






With the gauges loose, clean the faces and needles with a light solvent like 3M Adhesive Cleaner.




I use a pinstriping brush and Florescent Red model car paint to repaint the needles. The color match is very close. It usually takes two coats depending on how faded the needles are. No need to mask the gauge faces since I'll use decals to cover the original painted faces.






I use decals made by Jason Wilson at Greenback Decals. They're a 100% copy of the original gauge faces and include the optional tach, vac, or air gauge decals. He also includes both 64/65 and '66 style water temp decals so you can correctly restore either style gauge.

Here's his website.
http://parklane410.wix.com/home





To apply the decals, lightly wetsand the gauge face with 1000-2000 grit to remove any roughness or embedded dirt/dust. On the speedometer you'll need to bend up the tabs that hold the "bright" indicator filter and remove it.







Clean the face and spray it with glass cleaner so the decal can be positioned.




Apply the decal and use a soft rag as a squeegee out air bubbles and excess glass cleaner.




Once it's dried cut X's in the odometer and bright lights indicator openings and fold the decal over to uncover the opening.






On the small gauges, you'll have to cut a slot to clear the needle.




Ready to install in the cluster.




The decal on the air gauge (and probably a vac gauge too) will have to be punched for the needle stem and stop pin, and slit to fit around the needle's stem.




Clean all the hardware and terminals with a wire brush.




And reassemble the gauges onto the blasted and painted gauge mounts.




The gauge mounts bolt back in the main housing.




(Aftermarket tach, wiring is different than stock)




To reset the odometer, take the speedo face off by removing the two screws at the bottom of the face, and the inner silver colored plate will come off too.






Remove the brass clip.




Slide the odometer roll all the way to the left.




And pull the roll out sideways.




There are metal "legs" that fit in a channel in the speedo housing, hold the first (left) leg and rotate the second wheel around until the "9" is facing up. Work your way down, holding the next leg over until all the wheels have 9 facing up. It's easy slip and let a digit roll over one too many so it may take a few tries. With all the digits and legs aligned you can apply the decals to each of the wheels then put it back together.






Put the face back on the speedometer, put the rubber pad on the back, and install the speedometer in the housing using the three longer screws that have rubber bushings.







That finishes the gauge restoration.

[theastronaut]

The intermediate plate needs to be painted. Sometimes they're in good enough shape that you can just clean and scuff them with a gray scuff pad, but this one had paint that was flaking so I had to strip the whole thing.


I used a scuff pad and lacquer thinner to strip it (wear gloves!). You can't blast these since they're very thin aluminum and will warp badly.






I use Krylon Satin Black after cleaning with prep solvent and wiping over with a tack rag.





The turn signal lenses can be lightly sanded with 600-800 grit and sprayed with satin clear to restore the faces if they have scratches or are chalky.




I had a pair that are in near perfect shape so I didn't have to fix the original pair.




On warning light models, the lenses can be made from sheets of translucent plastic from a arts/craft store like Hobby Lobby or Michael's. You'll have to stack a few layers together to make them dark enough, and lightly wetsand the top layer with 1500-2000 grit to knock the shine off and make them dull like the original lenses.




You can use the same translucent plastic for the "TAND'M LOCK" and "OVER SPEED" lenses. I made decals using Avery translucent adhesive backed printable sheets, with the font printed in reverse to apply to the inside of the decal as the factory did.






Installed on the intermediate plate, bend the tabs open to get the old lenses out and trim the new peices to match before installing them.







Jay (Lugnutz65) sent me these pictures that that show how adding aluminum foil tape inside the light tubes will increase the brightness of the indicator lamps. Very neat modification and one I'll be doing to my own cluster! Big thanks for the suggestion and pics Jay!!

Originally Posted by Lugnutz65

John, I decided to line each light tube with foil tape. It'd have been easier to put the tape inside those little tubes if I had elf fingers. LOL! You can see the light transmitted is whiter and brighter.

Thanks again,
Jay

I'll let the pics do the talking.

[theastronaut]

To clean and detail the wiring harness I like to remove the wrapping and clean the connectors and wires with 3M Adhesive Cleaner. That removes all the grime and stains and makes the new electrical tape stick better.

Before cleaning:




Make note of the way the factory tied the end of the wrap and also how they wrapped the tape around the clip.






Sometimes there will be cuts or modifications that will need to be fixed. I have a spare bulb holder from another junk harness to take care of this. A crimp-on butt connector can be used to fix cuts like this.






Wrap removed, wires and connectors cleaned.




After cleaning, rewrap the wiring with electrical tape, starting at the end away from the harness plugs. To make the knot at the end, clean the adhesive off the last few inches so the knot won't stick to itself.






Some harnesses had cloth friction tape instead of electrical tape. I like this better than electrical tape since it has more of a vintage/classic look. It goes on the same way as electrical tape does, except you can't remove the adhesive for the knot. Use glass cleaner as a lubricant when tying the knot.








For the final detailing, I like to use Duragloss on the wires and connectors to bring out the color and add a slight sheen. It isn't alcohol based so it won't dry out the material.






If you have any other wiring you can also wrap it for a more detailed look. There were three wires for the aftermarket tachometer so I braided them first to make them easier to wrap. I tied one end to mimick the factory wrapping style. I'm just a little OCD if you haven't noticed by now.






To clean the bulb holders take 0000 steel wool and Nevr-Dull wadding and mix them together. The steel wool will cut the oxidation off without scratching the plating much better than polish alone will.






Before and after.




Ready to install back on the cluster with new bulbs.

[theastronaut]

The (almost) finished cluster. Still need to add the modified speedometer background decal.

[brokenspoke]

Subscribed

[hopped up]

Great thread. I have a cluster i need to do this to also
Posted via Mobile Device

[rtk434]

Awesome thread. Thanks for sharing your process. You do really nice work.
Posted via Mobile Device

[Auctioneerhere]

Hands down this is the best site out there because of members like you who post things like this.

Thanks!

[Realnoisy]

Subscribed

[dougf]

This takes a lot off effort to put together a post like this, thank you! I have been wanting to do this, man you have helped me out so much just by posting!

[Blue_Aura]

Subscribed. Thanks for the write ups! Great work.
Posted via Mobile Device

[Ta2Don]

Awesome, Subscribed... Thank You!!!

[65Gregg]

Subscribed as soon as I saw the title
Posted via Mobile Device

[theastronaut]

Thanks dudes! I'll work on filling in the blanks later this week!

[LostMy65]

Added to Faq's
http://67-72chevytrucks.com/vboard/s...79#post5807579
Posted via Mobile Device

[MARTYZ]

Nice work, subsribed

[burbluv]

Please note that you must be a supporting member to post classified items. This includes but is not limited to What Its Worth, Want To Buy, Want To Trade, and For Sale. Please consider supporting the forum by subscribing. Further information on the subscription levels available are located here

If you need any further assistance with that please contact any Admin for help.

[MikeS.]

Thanks!
Posted via Mobile Device

[darkhorse970]

Very nice writeup!

[62 short step]

Nice!

[duallyjams]

Thanks