NOS GM#3856223 CRANKSHAFT

[JBB]

Hi Scuncio.
I checked competition products, they are sold out.
( is this the shop in Wisconsin?)

[Hotrodpaul]

Is this crank factory Nitrided and Cross Drilled as used in L78 applications? I purchased a 6223 crank off ebay several years ago that was Nitrided (Gray color) but the Mains were not cross drilled. It was a factory GM crank.
I did cross drill it on my Bridgeport Mill since it was used in an L78 application.



Paul

[JBB]

Hi Paul. 70 Z in that color is cool. Anyway, the crank is nitrided from the factory, but not cross drilled, and I wonder if this was done at the factory. Any thoughts?
I will try to find a picture to post, I don't have a camera
anymore.

[JBB]

Paul, this crank was for my 69 L-78 Camaro that is long
gone. I only have this and a couple of other parts left. Paul I also noticed that the crank I have is not all grey in color, but has different shades of grey along the journals and connecting rod points. This is indicative of factory heat treating. (not saying yours isn't)....Joel

[DarrenX33]

Hmmm... I do need one...

[427king]

There are a few different cranks 1] the ebay nos ones that are from 125 to 275 are mostly all seconds[due to handling] that were from a bus company from about 7 years ago . They were strapped to palats 100 at a time or so and almost all are nicked,rusty,or need to be cut or whatever,ive heard there were 3000 of them and one outfit bought them all. 2] 7115s are the real L88 niotrated cranks and expensive 3] the cross drilled,black green and pink nos 6223s were used in counter L88s after the 7115s ran out around 1980 but not the factory 68 and 69s which used 7115,they are just as good as the 7115 and less money 4]there are also those grey looking non crossdrilled pieces that someone puts red dots on to look new ,i say they are used and someone is trying to sell them as nos. i bought a few and they were way under spec.I think they are PAW core?cranks being sold as nos for whatever reason, still a good deal for under 200.00 if you can get one that doesnt need to be cut. make sure the crank you get is in the box or from someone you know or it will probably be a second or blemish,and in some cases a returned crank to GM that someone didnt want or was out of spec. I have bought a few nice nos cranks for 125.00,im not sure how anyone can sell them so inexpensively.It cost that just to have one turned,any crank in the gm box[or if you know for sure its true nos] is worth buying.

[JBB]

Well I sure don't know about it as much as the 427 king, but I would guarantee STD/STD on the dimentions, and have it mag tested. I KNOW this is brand new and not junk, it was for my 69 L-78 Camaro, and if you know how car extremists are, you know this had to be good. Joel

[JBB]

All gone. thanks for your help........take care...Joel

[PeteLeathersac]

Thanks Joel & Chuck...this post turned into some great education for the rest of us!.

~ Pete