Cadillac Misfits
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Author Topic: Nice?Good deal?  (Read 988 times)
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Denrep
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"Smoke was rollin' from out'a the back..."


« Reply #15 on: April 08, 2016, 12:13:32 PM »

Ol' fashion spark, chip, or flame tests would  ID the material well enough for our purposes.
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...When I started to gain on that Cadillac!
Denrep
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"Smoke was rollin' from out'a the back..."


« Reply #16 on: April 08, 2016, 12:18:23 PM »

I get the theory...
but right now, strictly from memory of their appearance,   I have a hunch that the OE Cad gears are steel.  

One of these days we can get one in hand and give it at least a rudimentary test.  



I have one on the shelf. Do I just take a magnet to it?

Missed that Russ. Cool.
Touch it to a bench grinder and compare results to spark chart.
Drill with a small sharp drill bit and see if the cut makes chips (iron) or shavings (steel).

There's more but these are easy and the least destructive.
« Last Edit: April 08, 2016, 12:37:11 PM by Denrep » Logged

...When I started to gain on that Cadillac!
Russ
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« Reply #17 on: April 09, 2016, 01:44:55 PM »

I remembered I made a priming tool from an old dizzy.  The machine shop shaved off the teeth on the gear, as the connecting point to the oil pump shaft is the bottom part of the gear.  The surface where the gear teeth were, is nice and smooth.
Tool a magnet to it, and it sticks.   Where is this so called spark chart?  Goggle it?

I don't have time to do the drill bit test, as I'm heading out soon to pick up a 62 Fleetwood parts car.
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63 4 window sedan, series 62

2006 Chevy Silverado 2500 HD
Denrep
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"Smoke was rollin' from out'a the back..."


« Reply #18 on: April 09, 2016, 02:14:10 PM »

If the machine shop "shaved" rather than "ground" the gear, and it's real smooth... sounds like steel.
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guidematic
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« Reply #19 on: April 09, 2016, 02:53:42 PM »


 I always figgered they were steel. Case hardened like a cam. Then coated to help run in. The updated HT4100 gears are like that.

 Mike
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The liar must have a good memory, and must also construct more lies to prop up the lies. It becomes a house of cards, and eventually the winds of truth will blow down that house of cards.

 The truth speaks for itself, and in turn justifies itself. Lies justify nothing.

 That is the case of the entire history of the 20th century. The lies cannot be sustained. Revisionism are those winds of truth, and soon that house of cards will come down and expose the liars.

1970 Fleetwood Brougham 68169
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1990 Brougham d'Elegance 6DW69
1991 Seville STS 6KY69
1994 Fleetwood Brougham 6DW69
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« Reply #20 on: April 09, 2016, 04:18:19 PM »

The distributor gear must be softer than the cam gear by design since it is designed to be the replaceable wear part and the old flat tappet cams are case  hardened iron so if the gear is steel it must be very soft steel.
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