Ordering a crank from autozone..

M

mk3ftMFw

Mini Toon Burnout!! FTW!!
Jan 24, 2007
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If i do have a pretty effed up crank, i can get a discount from autozone. I was looking at their remanufactured cranks.. Does this sound like a good idea/bad idea?

http://autozone.com/R,APP485447/veh...partType,00229/shopping/partProductDetail.htm


Forging #6M Blueprint series, matched bearing sets, plastiguage, and bolt boots included. All units are radiused for strength, hand chamfered for increased oiling, indexed for straightness, also shot peened & stress relieved for durability. *** Call 1-888-834-7458 for application verification and estimated delivery time prior to ordering ***
Click to expand...

Also what does the Forging #6M blueprint series mean?
 
Yellow 13

Yellow 13

Lurker
Apr 4, 2006
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mk3ftMFw said:
Also what does the Forging #6M blueprint series mean?
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I'm guessing its a 6M crank, not a 7M. MKIII's came with either, 7M being in the later year models.

Link doesnt work, but I think it'd be cheaper to just get yours reground.
 
M

mk3ftMFw

Mini Toon Burnout!! FTW!!
Jan 24, 2007
95
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Cincy
TOMA70E said:
I'm guessing its a 6M crank, not a 7M. MKIII's came with either, 7M being in the later year models.

Link doesnt work, but I think it'd be cheaper to just get yours reground.
Click to expand...

I must be talking to the wrong people... I've called a few shops and theyre asking almost exactly as much as an entire KIT from autozone would cost me. That and when you get the crank machined, you lose a nitride layer which hardens the crank. It makes it easier to scratch again..

Yeah i think your right about the 6M crank, I want the 7m one just because of personal preference.

How much have you guys forked outt o get your machined??????
 
Q

quake

toyota tech
Apr 13, 2005
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r.i.
mk3ftMFw said:
I must be talking to the wrong people... I've called a few shops and theyre asking almost exactly as much as an entire KIT from autozone would cost me. That and when you get the crank machined, you lose a nitride layer which hardens the crank. It makes it easier to scratch again..

Yeah i think your right about the 6M crank, I want the 7m one just because of personal preference.

How much have you guys forked outt o get your machined??????
Click to expand...
first off bring your crank to a machine shop with a balancer. Next have it measured and let them tell you if they can reuse it or not bring the block and rods also rods checked and resized line hone the block balance all then you reassemble. All my machine work cost me 1800.00 then you have a fresh engine replace all seals replace and shim the oil pump
 
suprarich

suprarich

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Nov 9, 2005
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mk3ftMFw said:
That and when you get the crank machined, you lose a nitride layer which hardens the crank. It makes it easier to scratch again..


How much have you guys forked outt o get your machined??????
Click to expand...


Toyota does not nitrite the crank. There is no nitrite layer to lose when grinding a factory crank. A stock factory crank is induction heated by flame on the rod journals. Grinding a stock crank will not weaken the hardness, it is a forged steel crank and has the same hardness all the way through. Full service on your crank should not cost more than 250.00, unless it is cracked, bent (.030), or needs welding on the snout.
 
3p141592654

3p141592654

90T
Oct 11, 2005
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Not to be an ass, but nitrite is what you use to make hot dogs!

You use nitride (usually silicon nitride) for cutting tools and the like, due to its hardness, thermal stability, and resistance to wear.
 
suprarich

suprarich

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3p141592654 said:
Not to be an ass, but nitrite is what you use to make hot dogs!

You use nitride (usually silicon nitride) for cutting tools and the like, due to its hardness, thermal stability, and resistance to wear.
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Sorry, my spelling finger does not always work. Nitride when you are speaking of crankshaft hardness treating is not a thing at all. Nitriding is a process, not a tangible object. Nitriding of steel is the process of placing the object in a oven heated to 1050 degrees, then the oven is saturated with nitrogen gas. The gas is absorbed by the heated steel and increases the tensile strenght. the depth that the steel is hardened depends on how long the process is performed. The treatment we use is called 20 hr or 60hr treating. 20 hour will do a depth of about .001, 60 hr will do a depht of about .013.
Cost about 1.85 per lb or nitrogen with a 100lb minimum. A crank will use about 3-7 lbs of nitrogen.
 
suprarich

suprarich

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Nov 9, 2005
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mkIIIman089 said:
LMAO.... me too!
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Why laugh? That is what the blueing around the rod journals are from. It is an annealing process to stress relieve the crank after machine the raw forging, and to slightly case harden the area where the journal meets the crank. This process is done on lots of cranks today. I see it on a lot on ls-1, lt-1, and ford steel cranks.
 
I

IJ.

Grumpy Old Man
Mar 30, 2005
38,728
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I come from a land down under
ROFLMAO @ "Induction flame hardening"

clue=electricity and shit loads of it ;)

Definition: A widely used process for the surface hardening of steel. The components are heated by means of an alternating magnetic field to a temperature within or above the transformation range followed by immediate quenching. The core of the component remains unaffected by the treatment and its physical properties are those of the bar from which it was machined, whilst the hardness of the case can be within the range 37/58 Rc. Carbon and alloy steels with a carbon content in the range 0.40/0.45% are most suitable for this process.
 
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