Worth hanging onto a 12 counterweight crank? - JeepForum.com
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post #1 of 9 Old 09-10-2019, 10:33 AM Thread Starter
DaveMueller
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Worth hanging onto a 12 counterweight crank?

I'm sending a '74 cracked 258 block to the junk yard at the end of summer. I'm pretty sure it has the 12 counterweight crankshaft. Is it worth hanging on to? I have no idea how many miles the engine has, it came in my '76 CJ5.

Same for the old cast iron mated manifolds (in good shape), think anyone will need them?

THanks


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post #2 of 9 Old 09-10-2019, 12:21 PM
only in a jeep cj
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Keep the crank and rods.
I’d sell them for 100 bucks years ago. Should be worth more now.
But that was when building strokers out of 4.0 blocks was popular.
Now it’s all about LS style swaps.
You can at least pull a few bearing caps and see if it’s worn bad...
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Ed
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post #3 of 9 Old 09-10-2019, 12:37 PM
only in a jeep cj
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Keep the crank and rods.
Iíd sell them for 100 bucks years ago. Should be worth more now.
But that was when building strokers out of 4.0 blocks was popular.
Now itís all about LS style swaps.
You can at least pull a few bearing caps and see if itís worn bad...

Ed
1975 CJ-6 1983 CJ-8
1986 CJ-7 Laredo 1986 TJ-7 Trail Jeep
2003 Inca Gold TJ Rubicon
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post #4 of 9 Old 09-12-2019, 02:46 PM
RedNeckCorvette
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This stuff is all history, Keep that in mind when ditching parts. There is someone in need or there will be.
RN
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post #5 of 9 Old 09-12-2019, 03:45 PM
agear
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I read somewhere the "heavy" (12 weights) was smoother runninh

1984 jeep cj7, 258 I6, rebuilt T176,rebuilt Dana 300, amc 20 , dana 30, 4.10's Trac-lok in rear , 4.10's detroit soft locker in dana 30, 2.5 inch bds suspension lift, 1 inch polyurethan body mount lift. Line ex. weber carburetor. factory tach. factory clock ,oem replacement speedomter cluster, and oil pressure gauge, factory volt gauge.
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post #6 of 9 Old 09-13-2019, 02:57 AM
Axhammer
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If you ever drive to the Outer Banks bring it with you. Iíll take off your hands and make your efforts worthwhile. Donít junk it!

1985 CJ-7 258/auto Red paint, white Hardtop
2017 JKU SAHARA Silver paint, Black Hardtop
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post #7 of 9 Old 09-13-2019, 09:35 AM Thread Starter
DaveMueller
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Quote:
Originally Posted by Axhammer View Post
If you ever drive to the Outer Banks bring it with you. Iíll take off your hands and make your efforts worthwhile. Donít junk it!
If only you would have replied a few days ago, my parents are in OBX on vacation this week!

The 12 counterweight may or may not be smoother running, but since it has more rotating mass it stores more energy which is good for slow speed moving like rock crawling. But it's less zippy since it takes more energy to get to higher rpms quickly. Cruising, there's no advantage to either one.

I'm going to pull the sheet metal, crank and cam, spray them with oil and hide them in the garage somewhere.

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post #8 of 9 Old 09-13-2019, 09:54 AM
dirtdudeaz
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If you're building another engine, keep it for a stroker. If you don't need it sell the rods and crank; strokers are still popular. You should be able to get more than $100 easily (150-300).
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post #9 of 9 Old 09-14-2019, 09:41 AM
Axhammer
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My offers stands. If you still have the 12 CW (heavy) crankshaft and are planning on driving to the Outer Banks, whether it is next week or next year, or three years from now, let me know and I’ll take it off your hands at a fair Price. The good thing for you is they don’t make them anymore so the value will only increase. I don’t even have a current plan or need for that crank, kinda like the spare “103” N cranks (Pontiac 455) I have out in the garage. When you have cars that are no longer manufactured, like AMC and Pontiac, it’s better to have and not need than to need and not have. You never know when you might want to build an engine that makes real power, and that AMC crank will do it.

1985 CJ-7 258/auto Red paint, white Hardtop
2017 JKU SAHARA Silver paint, Black Hardtop
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