Deck it or not
Posted: July 23rd, 2023, 3:19 pm
This is my first build ever. So here’s the plan. I got a 99 XJ 4.0 engine in the machine shop, I sources a 258 Crank short snout out of a 80’s pacer. The head is already done and we’ve moved onto the block. I’m wanting to use the 4.0 connecting rods and KB438C pistons with a compression of 9.3:1. We are boring the cylinders to 30 over. I’ve already ordered the pistons.
In talking with the machine shop I’m wondering if the block needs to be decked down? Our main goal is to put the engine into an 83cj7 and use it as a fun cruising jeep. No mudding or rock crawling.
The machine shop thought it would be fine to level out the deck and then maybe take a little off the deck to tighten the quench but not enough to necessitate new push rods.
Th dish on the pistons is -21cc
The compression height is 1.353 on the pistons.
Any advice I can get would be appreciated
In talking with the machine shop I’m wondering if the block needs to be decked down? Our main goal is to put the engine into an 83cj7 and use it as a fun cruising jeep. No mudding or rock crawling.
The machine shop thought it would be fine to level out the deck and then maybe take a little off the deck to tighten the quench but not enough to necessitate new push rods.
Th dish on the pistons is -21cc
The compression height is 1.353 on the pistons.
Any advice I can get would be appreciated