New ZL1 engine assembly
Thread Starter
Advanced
Joined: Jan 2012
Posts: 98
Likes: 11
From: Greenfield, WI
New ZL1 engine assembly
I am starting the assembly of my new from scratch ZL1 using the 12370850 bare block from Chevrolet Performance. I am having a hard time finding out where I need to install the oil bypass valve(s) by the filter boss. I have a couple of diagrams that I got from Chevrolet Performance showing where they go if using an oil cooler but I will not be using one. Does anyone have any experience building one of these and know which hole(s) the 25013759 valve(s) get installed in when no oil cooler is used? The holes by the filter boss are different on this block than other BBC blocks.
