Re: cast or steel crank 440
[Re: 71 R/T]
#664072
04/07/10 09:40 PM
04/07/10 09:40 PM
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Joined: Nov 2006
Posts: 3,407
S.E. Florida, USA
rrunner
master
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master
Joined: Nov 2006
Posts: 3,407
S.E. Florida, USA
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Quote:
Thanks for the replies.The balacer I think is the original as it is as grungy as the rest of the motor.I was kind of thinking that it may be converter balance weights as they are the size of a half a stick of gum each.I can't seem to see the letter on the pad just 440 and a few numbers at the bottom of pad gonna pull the compressor and get a better look.What should the letter be for a steel crank?
There will be a E on the pad after the 440 stamping. The E stands for cast crank. If you look at the crank flange, where the flex plate bolts up, you can ID a forged crand by a 1/4 or so kinda flat fordging line. A cast crank will have a thiner more raised casting line.
The weight you described sounds like converter balance weights as the cast crank balance weight is a thicker weight.
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Re: cast or steel crank 440
[Re: 71 R/T]
#664075
04/07/10 11:13 PM
04/07/10 11:13 PM
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Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
dave571
master
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master
Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
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Quote:
I just purchased a 440 the cast date on the block is 1973 so I assume it came in a 1974 vehicle.The motor is complete and was out of the car when I got it.My question is it a steel or cast crank?It has the thin balancer that is used on steel cranks but when I pulled the starter to bar the motor over I seen 2 small weights on the converter so I thought only cast cranks had weights on the converter.
a 73 dated block would likely come in a 73, nbuless it was dated late in 73. They didn't keep them laying around back then.
In any case, it sounds forged to me. A 440 should be in 73. I have seen 74's forged too, so I think the split came in 74, even though common thinking is otherwise.
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Re: cast or steel crank 440
[Re: Commando1]
#664077
04/08/10 06:21 PM
04/08/10 06:21 PM
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Joined: Nov 2006
Posts: 3,407
S.E. Florida, USA
rrunner
master
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master
Joined: Nov 2006
Posts: 3,407
S.E. Florida, USA
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Quote:
Smaller damper and weights on the TC....
One thing left to do. Drop the pan.
Why drop the pan? Just look at the cast/fordging mark on the cranks flange.
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Re: cast or steel crank 440
[Re: 71 R/T]
#664079
04/08/10 07:17 PM
04/08/10 07:17 PM
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Joined: Jan 2003
Posts: 25,949
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,949
Rio Linda, CA
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As stated earlier, if there is no E stamped near the 440 on the top pad, it left the factory with a forged crank.
The INTERNET, the MISinformation superhighway
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suffix E would denote that it originally (& probably still does) had a cast crank in there
