cb performance crank identification?

my56sedan

Is therr anybody who knows the specs on a pn#18682 cb 82mm crank? Or maybe how I can find out? Its from the early 80's and still in the box. I want to make sure its worth using.

miniman82 · Posted: Thu Apr 02, 2009 5:33 pm Post subject:

Why not call CB and ask them? A couple of those guys have been there that long- Bob for sure.
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Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

Bashr52 · Posted: Thu Apr 02, 2009 8:18 pm Post subject:

Cb usually stamps the crank with a stroke.

my56sedan · Posted: Thu Apr 02, 2009 8:41 pm Post subject:

well, Im trying to find out what material its made out of. Im sure it forged and not cast, but I would like to make sure before I use it.

stoneloco808 · Posted: Thu Apr 02, 2009 9:51 pm Post subject:

Are there any stampings of any kind anywhere on the crankshaft? If so, please post up what you find.

miniman82 · Posted: Thu Apr 02, 2009 10:40 pm Post subject:

Pics?
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Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

my56sedan · Posted: Fri Apr 03, 2009 6:21 am Post subject:

box says PN# 18682 and crank is stamped the same

my56sedan · Posted: Fri Apr 03, 2009 12:51 pm Post subject:

CB just wrote back. They said they were sorry but they dont have any of that information anymore.........

Type 5 Joe · Posted: Fri Apr 03, 2009 12:54 pm Post subject:

It can be visually Identified.... Post a picture.

Howard 111 · Posted: Fri Apr 03, 2009 1:23 pm Post subject:

I had a CB crank many years ago. It was not a chromoly crank, and after several calls to CB about what it was made of, I decided to use it.

2 runs down the track, and the flywheel loosened. I tore the engine down, and there were cracks on the edges of several rod journals.

I stayed away from CB for many years after that, and they went through some major changes.

I imagine the info CB had on that crank went in the trash at the beginning of the company rebuild.

CB is a fine company now, and makes quality parts, but it wasn't always that way. I wouldn't use that crank unless you can have it tested and determine what it's made of.

.

turboblue · Posted: Fri Apr 03, 2009 2:01 pm Post subject:

Many years ago just about all CB cranks were cast.
Forged cranks then were not very affordable to the average consumer.
Here is a picture that should help identify a cast from a forged crankshaft.

It is the parting line that tells all.
These are not VW crankshafts but they still apply.

Narrow parting line is a cast crank.

Image may have been reduced in size. Click image to view fullscreen.

Wide parting line is a forged crank.

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Gary

Turbo VW Sand Drag Buggy

"If you don't run into the Devil every once in awhile, you must be going in the same direction!"

Type 5 Joe · Posted: Fri Apr 03, 2009 2:23 pm Post subject:

I think the old CB Cast crank had a thick parting-line boss that looks like the forged chevy crank.

The CB cast crankshaft is alot more massive than a forged VW crank. I can tell at a glance.

my56sedan · Posted: Fri Apr 03, 2009 3:11 pm Post subject:

Im not sure that its cast. Ive been told that cast doesnt have a ring to it. Kinda just a thud. This one has a ring to it when tapped and it looks like most other forged cranks. Maybe Im just a tard for listening to so many different people. Ill get some pics up tonight.

Type 5 Joe · Posted: Fri Apr 03, 2009 4:19 pm Post subject:

A "Ring test" will work with cast or forged....

A "thud" means it is probably cracked.

my56sedan · Posted: Sun Apr 05, 2009 5:26 pm Post subject:

miniman82 · Posted: Sun Apr 05, 2009 5:48 pm Post subject:

Looks just like the 82 stroke I have in the garage...
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Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

my56sedan · Posted: Sun Apr 05, 2009 6:16 pm Post subject:

Is yours cast or forged?

stoneloco808 · Posted: Sun Apr 05, 2009 6:44 pm Post subject:

Curious how do the oil passage way plugs look like? Allen head plugs? Or looks like something like someone machined it down a bit?

my56sedan · Posted: Sun Apr 05, 2009 6:51 pm Post subject:

Nope. They look like their plugged with a metal plug.....

Type 5 Joe · Posted: Sun Apr 05, 2009 6:53 pm Post subject:

Sorry, but that is a Cast C.B. Crankshaft for sure...... Crying or Very sad


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