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L48 cast or forged crank?
I have a 1969 block casting number 3956618 suffix code is T0923CNJ, original heads were 3927186, now vortec, would this block more likely have come with a cast or forged crankshaft from the factory? I just put a new oil pan gasket on and forgot to check the number on the crank while I had it off, and I really don't want to pull it back off just to check one number, the output of this engine isn't really "forged" necessary, but it may be in the future. So I would like to know if maybe most came with forged or if only 10 came with them. Thank you.
2 Answers
- Shaun H-ALv 79 years agoFavourite answer
Factory Forged cranks back then were not what people thought they were. Just like the old rectangle port Big Block heads, which the stock small block Vortec heads (having half the port volume) yet out flow those heads. LOL.
Source(s): Camshaft design/manufacture, full competition race engine building/development, failure analysis of internal engine components, Carb blueprinting, drive-ability/MPG/durability expert, chem analysis of fuel, super-tuner. - ?Lv 79 years ago
Most were cast but you can look when next you soup it up some. A wide seam is forged, a narrow seam is cast.
