Re: 318 crank in a 340????
[Re: ahy]
#154828
11/22/08 11:02 AM
11/22/08 11:02 AM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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balance will be different too.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: 318 crank in a 340????
[Re: buildanother]
#154831
11/22/08 11:45 AM
11/22/08 11:45 AM
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Joined: Apr 2007
Posts: 2,327 Glendale, AZ
69L78Nova
Banned. Forever.
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Banned. Forever.
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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The 318 crank went cast in 1973. Forged just like the 340 until then
1969 Nova 454/M21/3.31 Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD 5.0/4R70W/3.55 (Daily driver)
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Re: 318 crank in a 340????
[Re: 69L78Nova]
#154832
11/22/08 12:45 PM
11/22/08 12:45 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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There are actually part numbers for cast cranks in 318's starting in 67 IIRC. It's a common myth that 318's were steel cranks. I've never torn down a LA family 318 that wasn't cast
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Re: 318 crank in a 340????
[Re: 69L78Nova]
#154834
11/22/08 02:57 PM
11/22/08 02:57 PM
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Joined: Jan 2003
Posts: 4,150 lewiston, ID
cornucopia
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Joined: Jan 2003
Posts: 4,150
lewiston, ID
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Quote:
The 318 crank went cast in 1973. Forged just like the 340 until then
untrue...I have pulled apart MANY 68-72 vintage 318s and they all had cast cranks...
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Re: 318 crank in a 340????
[Re: moretoys]
#154838
11/22/08 04:09 PM
11/22/08 04:09 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:
Is the general rule of thumb about cast crank having the thicker balancer gone??
It's a general rule that never applied to 318's or 273's.
As mentioned, 318s are neutral ballanced with either cast or forged crank.
Here are some part numbers
year cid material cast#/forge#
64-67 273 forged 2128278, 2128869, 2205700
68-69 273 cast 2658268, 2658393
67-73 318 cast 2658278, 2658393
74-86 318 cast 2658278, 2658393, 3462387 2658391
68-72 340 forged 2532457, 2843868
73 340 cast 3462387
71-86 360 cast 3418640, 3418641, 3418642
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