What crank

[sammie]

Just took the oil pan off to clean it up and take a look inside. This is a 340x block that was in a car I bought recently. Is this a cast or steel?

 

[yellow rose]

Hard to tell from that picture. Take a closer shot of the crank pins.

BTW, are you sure it’s an X block?

 

[pishta]

forged,,,see the rounded edges of the throws......cast are sharp cornered.

 

[toolmanmike]

Look at the wide parting line on the row under and to the right of the pick up screen. Forged.

 

[yellow rose]

forged,,,see the rounded edges of the throws......cast are sharp cornered.

Wow. You guys have way better sight than I do. Is the picture a bit blurry for you?? It is for me with and without my glasses. Probably need to get an appointment and get checked.

 

[pishta]

I always just look at crank throws, from a mile away you can tell if its rounded or squared off.

 

[sammie]

Thank you guys! Awesome! That made my day a little better!

 

[cudamark]

Forged crank, but, it shouldn't look like either of the ones Pishta posted. It should look forged like the one on the left, but, have the front and rear rod journal hole like the one on the right.

 

[Krooser]

Mopar cast cranks are cast steel.... Nothing wrong with those.

 

[K.O. SWINGER]

Anything's possible but I certainly would be surprised to find a cast crank in a X block.

 

[Captainkirk]

I vote forged. The counterweights are drilled for balancing. Cast cranks are externally balanced.

 

[Bodyperson]

Forged crank, but, it shouldn't look like either of the ones Pishta posted. It should look forged like the one on the left, but, have the front and rear rod journal hole like the one on the right.

But only for the 340 heavy rods. 273 and early 318 forged cranks do not have the connecting rod journals drilled because they use lighter rods.

 

[Captainkirk]

But only for the 340 heavy rods. 273 and early 318 forged cranks do not have the connecting rod journals drilled because they use lighter rods.

This is a 340 X block.

 

[Bodyperson]

This is a 340 X block.

That could readily accept a 273 crank. Just saying. Some people use 273 rods and light pistons for quick revving engines. Who knows what crank may be in there. I was just stating a fact for the OP's information.

 

[Captainkirk]

That could readily accept a 273 crank. Just saying. Some people use 273 rods and light pistons for quick revving engines. Who knows what crank may be in there. I was just stating a fact for the OP's information.

Gotcha. Makes sense in that context.

 

[Bodyperson]

Gotcha. Makes sense in that context.

Ya, I guess the context was out of wack. I'll try harder next time

 

[Captainkirk]

Ya, I guess the context was out of wack. I'll try harder next time

I hate when that happens...