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C2 Instrument Cluster Restoration Recommendation

 
Old 04-08-2019, 04:55 PM
  #21  
68hemi
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Originally Posted by 99Silverbullet View Post
Starting the restoration on my 65 and need the instrument cluster restored and all gauges tested.

Who do you recommend for this and who is reasonably priced?

Thanks!
http://corvettespecialtiesofmdwest.c...ricing_c2.html
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Old 04-08-2019, 06:14 PM
  #22  
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Default Tank sender frying fuse??



Another aspect of my cluster refresh... the fuse driving the temp and fuel gauges blew. Replaced. Blew. Process of elimination identified the pink wire going to the fuel sender. With everything else connected but the pink wire... no blown fuse.

Hmmm...

Picture is the underside of my new gas tank with it's new fuel sender. The pink (+12v coning from the fuse in question) goes on 'I' and the tan goes on 'S' - goes back to the gauge. Wires only fit one way. An ohm meter gives curious results.

I is effectively GROUNDED. I to ground is 0.

S to ground is a few ohms - like 5.

I to S is a few ohms - like 5, and identical to S to ground.

Call me crazy, but I don't think that I should equal ground. But at least the short is sitting in gasoline. What could POSSIBLY go wrong with 10 amps coursing through a gas tank? After all, it's only for a second or two until the fuse blows.

I tossed the old sender, so I don't even have that to compare to. What I'm curious about is - what SHOULD be the resistance values?

I think I'll be looking for a warranty replacement.... but before I drain and yank, if anyone has 'good' values, I'm interested...
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Old 04-14-2019, 11:24 AM
  #23  
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Originally Posted by as400jockey View Post
...

Does anyone know if it's possible to re-introduce some oil into the gauge, and if so, what type? I have some very thin synthetic oil that I use to lube small electric fan motors. It has a hypodermic-like tube, so if there's someplace where I can squirt it into the gauget, then I have a shot... And then any guesses as to how much - a drop? 1ml? 3ml?...
.
I answered my own question... I removed the gauge from the stamped housing. The gauge face is riveted to the gauge, so there's no access there. After removing the phenolic board from the back of the gauge, there is no access to adding oil, so it looks like it is what it is. Hopefully it'll be stable once juice is applied. If it bounces around while driving I'll post back here just to let the Universe know...
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Old 04-14-2019, 03:33 PM
  #24  
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Originally Posted by as400jockey View Post

Another aspect of my cluster refresh... the fuse driving the temp and fuel gauges blew. Replaced. Blew. Process of elimination identified the pink wire going to the fuel sender. With everything else connected but the pink wire... no blown fuse.

Hmmm...

Picture is the underside of my new gas tank with it's new fuel sender. The pink (+12v coning from the fuse in question) goes on 'I' and the tan goes on 'S' - goes back to the gauge. Wires only fit one way. An ohm meter gives curious results.

I is effectively GROUNDED. I to ground is 0.

S to ground is a few ohms - like 5.

I to S is a few ohms - like 5, and identical to S to ground.

Call me crazy, but I don't think that I should equal ground. But at least the short is sitting in gasoline. What could POSSIBLY go wrong with 10 amps coursing through a gas tank? After all, it's only for a second or two until the fuse blows.

I tossed the old sender, so I don't even have that to compare to. What I'm curious about is - what SHOULD be the resistance values?

I think I'll be looking for a warranty replacement.... but before I drain and yank, if anyone has 'good' values, I'm interested...
The "I" is power from the ignition switch as the C2s use a "powered" sending unit (unlike the C1 and C3 cars)... This system is a voltage divider..

Use the attached document to measure things...
Attached Files

Last edited by Frankie the Fink; 04-14-2019 at 03:39 PM.
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Old 04-15-2019, 09:00 AM
  #25  
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Thanks for that. It's amazing the level of detail that is available for this car.

I told my wife recently that "don't worry, honey... the NEXT Corvette will be much quicker!!"
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Old 04-16-2019, 10:45 AM
  #26  
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Default Fuel tank sender to avoid...


beware?

A follow up on my tank sender debacle for others to ponder.

I bought a bunch of stuff at Eckler, including this offending sender. The offer two versions - one is more 'correct', and one is about $10 less. I'm not planning on more than the occasional Father's Day car show at the local church, so I opted to save the $10. Bad choice.

I returned the defective sender. They won't have the same one in stock until July (ouch! I already missed the single best weekend weather in recent memory). To my benefit, they replaced it with the 'more correct' one at no extra charge. So thanks to them for that.

I suggested to them that someone needs to tear down the one I sent back and find the short. That thing could have killed someone (i.e. ME) and burned down my house. I am happy not to have another one of those. I suggested that they cancel their order for more from that supplier and stick only with the better one.

I attached a pic from the Eckler web site where I bought it, and another that certainly looks identical from Rock Auto's web site. Steer clear...
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Old 04-16-2019, 12:25 PM
  #27  
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Originally Posted by as400jockey View Post

I told my wife recently that "don't worry, honey... the NEXT Corvette will be much quicker!!"
What did she throw at you?
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Old 04-24-2019, 09:57 AM
  #28  
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I got the new sender. My HF Multimeter tells me that I to Ground is about 100 ohm. The other to ground varies from zero to 100 ohm. Just like it should.

I am back on the road again!!
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Old 04-24-2019, 01:16 PM
  #29  
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Originally Posted by as400jockey View Post
I got the new sender. My HF Multimeter tells me that I to Ground is about 100 ohm. The other to ground varies from zero to 100 ohm. Just like it should.

I am back on the road again!!
The correct resistance range should be 0-90 ohms to bew a match for the gauge in the dash cluster.
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Old 04-24-2019, 02:43 PM
  #30  
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Originally Posted by as400jockey View Post
I'm knee-deep into refurbishing my instrument cluster on my 66 coupe. My temp gauge is working, but from what I've read elsewhere, the dampening oil must have dried up, because the needle goes 'boing...oing...oing..oing' (think 'mouth harp') before it settles in.
Temperature gauge does not use damping fluid, only the gas gauge has it.
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Old 04-24-2019, 03:46 PM
  #31  
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Originally Posted by slalomfiend View Post
Roger Scott at http://www.corvetteinstrumentservice.com/
did an excellent job on my cluster, gauges and clock.


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Old 04-24-2019, 05:57 PM
  #32  
Frankie the Fink
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The repro sending units have 90 (ohms) embossed on them but are slightly off to the high side - they'll work fine...
The damping in the fuel gauge is bad-to-horrible...in the 63 at least....I quit worrying about it and only refer to it when its stable...
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