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Who Repairs Tachometers?
Posted by: WhenIm64 ()
Date: April 19, 2017 05:37PM

This question was asked of me by a local club member. How should I know? I drive a Rampside with the basic instrument cluster -- a speedometer and a gas gauge. And the speedometer isn't necessary most of the time. smiling smiley

Anyway, this club member has a '65 Corsa in which the tach is now bouncing through about a 500 RPM range all the time.

Where should he turn?

WhyImWhenIm64

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Re: Who Repairs Tachometers?
Posted by: SoloCP ()
Date: April 19, 2017 06:13PM

Try Williamsons Instruments, They restored a 60's Air Guide Tach, Great Service.
[r.search.yahoo.com]-

Don
Kansas City
HACOA
61 Lakewood
62 Monza aka (Flicka)
62 Rampside
63 700 Sedan 3 Speed
64 Spyder Coupe (Bill Pierson Car)
64 Monza Convertible,140/4 Speed,Electric Heat,Kelsey Hayes Wheels
64 Spyder Blown, (Dave Bolduc Car)
65 Corsa 3.1 Liter Triple Weber (aka Unsafe)
65 Corsa 140/4 Speed with Triple Weber
66 Avenger, Corvair Turbo, Fuel Injected, Air to Water intercool 140. (Michael Mann Car)
67 Monza 110 Auto. Sugar Bear

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Re: Who Repairs Tachometers?
Posted by: SoloCP ()
Date: April 19, 2017 06:17PM

Try this www.williamsons.com

Don
Kansas City
HACOA
61 Lakewood
62 Monza aka (Flicka)
62 Rampside
63 700 Sedan 3 Speed
64 Spyder Coupe (Bill Pierson Car)
64 Monza Convertible,140/4 Speed,Electric Heat,Kelsey Hayes Wheels
64 Spyder Blown, (Dave Bolduc Car)
65 Corsa 3.1 Liter Triple Weber (aka Unsafe)
65 Corsa 140/4 Speed with Triple Weber
66 Avenger, Corvair Turbo, Fuel Injected, Air to Water intercool 140. (Michael Mann Car)
67 Monza 110 Auto. Sugar Bear

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Re: Who Repairs Tachometers?
Posted by: 66vairman ()
Date: April 20, 2017 09:00AM

WhenIm64 Wrote:
-------------------------------------------------------
> This question was asked of me by a local club
> member. How should I know? I drive a Rampside
> with the basic instrument cluster -- a speedometer
> and a gas gauge. And the speedometer isn't
> necessary most of the time. smiling smiley
>
> Anyway, this club member has a '65 Corsa in which
> the tach is now bouncing through about a 500 RPM
> range all the time.
>
> Where should he turn?

A few folks have done them, but tend to stop doing them after awhile.

Due to the large sweep of the Corsa tachometer the meter assembly is tough to mechanically calibrate. I did my own cars and half a dozen for buddies. I'm not a business and don't charge. I average ten hours per tachometer to get them to read accurately. This is probably why folks don't want to repair them. The other issue is the spring on the needle armature fails. About a third of the units I've worked on had that problem. The meters are OBSOLETE (Note DELCO used three different meter designs - all work electrically the same). After a few tries I gave up trying to repair the springs. The electronics is reliable and easy to fix. The old capacitors have to be replaced, but the other electronic components are usually good.

You said "the tach is now bouncing through about a 500 RPM
range all the time." - that suggests the needle armature spring(s) is broken - not good. The springs don't just return the needle, they are also conductors for the needle armature. When a needle armature spring breaks the meter circuit is open and the needle looses tension.

There are still spare tachometers out there so there is no demand for a modern replacement, but it could be done.

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