[slyalfa]

I have torn down 2 164 block and both show very bad wear and scratches on the crank.
I have never seen this kinda of wear on a nitrated crank.
both my verde and my spider cranks look brand new when I tear them down.
The verde had 260K and very damaged mains and the crank still looked perfect.
The 164 bearing were in better shape but the cranks look trashed.
I wanted to set up a good v6 but all my cores seem to have bad cranks.
Should look for a 2.5 crank and make 2.8's or have them reground?
how hard is it to find a good crank? This is getting frustrating.

 

[Alfisto Steve]

Don't know answer but I have a good 86 GTV6 2.5L crank in my spares.

I have a bad 3.0L 164 one too. Spun main bearing rest look fine.

I had three good 164 cranks I have used or sold now.

I bet they all are/were nitrided though.

 

[peglegtom]

I've Been Told,

but have not confirmed, that 164 cranks are nitrided. If the crank is bad in the LS that i'm in the process of pulling, I'll check it out. I'm a metallugist and easily do it at work. If the crank is good, however, I'm not ging to cut it up, which is what you need to do.