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Engine - Turbo & Block Modifications and upgrades to maximize your Dodges turbo output & Improving strength and durability - pistons to crank.

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Old 12-11-2012, 05:59 PM   #1
forged crank??  
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I am in the process of trying to buy a forged 2.2 common block crank. Atleast that is what the seller says it is. Can someone tell me where I would find the casting/part number that is stamped into this crank? Also how do you tell the difference between a common block crank and the other cranks, and how do you tell the difference between a 2.2 and 2.5 crank?
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Old 12-11-2012, 06:29 PM   #2
Re: forged crank??  
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look at the casting line. Cast cranks will have a very thin casting or parting line. Forged cranks have a wide line, like almost an inch. A 2.5 crank will be stamped with 2.5 on it.

Commonblock cranks have a lager diameter but shorter snout for the crank gear, non-commonblock have a narrower but longer snout for the crank gear.
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Old 12-11-2012, 06:59 PM   #3
Re: forged crank??  
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The common block cranks take a smaller front crank seal than the '
non-common block ones.

Forged cranks have a wide parting line on them, where as cast cranks have a thin parting line.
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Old 12-12-2012, 02:27 AM   #4
Re: forged crank??  
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Thanks for the info. It does have the wide parting line also the smaller seal diameter. So I'm pretty sure it is a common block forged crank from the info you guys gave me. I do not see any 2.5 stamped on it anywhere there are some #s stamped into the crank (doesn't look factory though) those #s are 35348 also in another spot 4168 and 6AL. The 6AL looks like it is the only factory #s cast onto the crank, the other #s looks like they where hand stamped. I have done a search on 2.2/2.5 crank casting #s and they do not match any of those, there is not enough #s. Where would I find the casting #s and 2.5 located on the crank?
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Old 12-12-2012, 08:16 AM   #5
Re: forged crank??  
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chrysler never made a 2.5 forged crank. if it is forged it will always be a 2.2 crank.

other forged crank indicators-

forged cranks will have a shiny appearance compared to a cast crank.

with a crank sitting on the ground standing straight up lightly tap it with a hammer, a cast crank will make a dull "thud" sound , a forged crank will ring like a bell when struck. this test will only work if crank is sitting on the ground.
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Old 12-12-2012, 10:02 AM   #6
Re: forged crank??  
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You could always take a pic and post it on here and someone can chime in.
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Old 12-12-2012, 06:59 PM   #7
Re: forged crank??  
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All the info has really been helpful. I figured it out it is a forged crank and I bought it. Thanks again
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Old 12-12-2012, 07:19 PM   #8
Re: forged crank??  
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Quote:
Originally Posted by ohnotagain View Post
with a crank sitting on the ground standing straight up lightly tap it with a hammer, a cast crank will make a dull "thud" sound , a forged crank will ring like a bell when struck. this test will only work if crank is sitting on the ground.
And a Masi forged crank will ring way longer than a T2 forged crank. Odd.
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Old 12-12-2012, 07:51 PM   #9
Re: forged crank??  
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it weighs more right ?
more molecules to get excited when ya tap it
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Old 12-12-2012, 08:07 PM   #10
Re: forged crank??  
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oh yea it's like twice as much. Let me put it this way, I can take a Forged T2 shortblock or a 2.5 shortblock, attach my engine stand attachment to them, and lift them up into the engine stand by myself. When I got my Masi longblock we unloaded it out of the back of the caravan with an engine hoist right onto the engine stand. I tore it down to just the shortblock and thought ok I'll yank this off the stand and put it on the floor to take the bracket off of the block for the engine stand. I slid it out and as soon as it came free it went straight to the floor! I couldn't slow it down at all!

This is off Thedodgegarage: "Crankshafts- forged vs. cast. Forged is stronger but weighs 6-7 more pounds more than a cast crank! (The 2.2 16V Maserati forged crank is even worse- it's 23 pounds heavier then a cast crank)

I guess I'll have to weigh them to see. It's going to be interesting to see how fast it revs by losing almost 20lbs off the crankshaft. :)
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