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Old 11-10-2013, 05:39 PM   #1
neb_subi
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Default Heat treaded crank or overheated?

Ive recently pulled a crank out of a spun motor and have come across this crank (pictured right) I have read that the rainbow colored ones are the new heat treaded cranks, is this true? I have not seen one until now. I just figured that is was over heated from the rod bearing failure?

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Old 11-10-2013, 05:57 PM   #2
carnz-pj-410
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Yeah that is a 12200AA330(heat treated) crank
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Old 11-10-2013, 06:08 PM   #3
Blackfin
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Another pic of that crank for reference:

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Old 11-10-2013, 06:27 PM   #4
cowboy_Rob
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Just another confirmation that looks just like my heat treated crank I bought new. The amount of heat it takes to get that purple on steel your block probably would've melted
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Old 11-10-2013, 06:55 PM   #5
neb_subi
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Quote:
Originally Posted by cowboy_Rob View Post
Just another confirmation that looks just like my heat treated crank I bought new. The amount of heat it takes to get that purple on steel your block probably would've melted
Ya kind of figured.
Hopefully the journal can be fixed now
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Old 11-10-2013, 06:57 PM   #6
neb_subi
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Out of curiosity what are the numbers on the crank?
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Old 11-10-2013, 09:50 PM   #7
BB2006LGT
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Sometimes it's best to get a new crank when cranks have special things to harden them done. I am not sure how deep the heat treating goes on Subaru cranks, but usually I only will grind a forged crank.
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Old 11-11-2013, 11:33 AM   #8
neb_subi
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Yes I took eh crank in today and was going to need to get turned. Wasn't all about that and having to get different sized bearings. So now it's either deal with it and do it or get a new crank
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Old 11-11-2013, 12:03 PM   #9
cowboy_Rob
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New crank from Subaru is stupid cheap. By the time you get it turned and buy different bearings its not even worth screwing around with
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Old 11-11-2013, 12:34 PM   #10
neb_subi
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Yes that seems like the better idea
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