2001 Jeep Cherokee overhaul
Seasoned Member
Joined: Oct 2015
Posts: 484
Likes: 17
From: Dunedin FL
Year: 1997
Model: Cherokee (XJ)
Engine: 4.0
Stage 0 is fixing what's broken, if you're running within spec (that takes some research and some testing) you shouldn't need to take it apart. Getting it there requires what you're doing now ie: fixing leaks, tracking down codes, replacing worn components, freshening up fluids/connections.
Aside from forced induction, there isn't much you should need to do internally if it runs well with no funny sounds or obvious issues.
Aside from forced induction, there isn't much you should need to do internally if it runs well with no funny sounds or obvious issues.
CF Veteran
Joined: Nov 2017
Posts: 3,700
Likes: 238
From: Groton, MA
Year: 1995
Model: Cherokee(XJ)
Engine: I6 4.0L
This getting it to stage 0 is what I'm trying to figure out. Before I did much reading, I figured a rebuild kit would be the way to go. Based on responses like the one by Basslicks at the start of this thread, I don't think so anymore. How do I make sure I get back to stage 0? Also, yes, I plan on fixing the do that? For the record, I've changed an engine before, but never taken one apart. I'm sure I will need to as part of this project.
As for the 0331, does a good compression test mean it hasn't happened yet, and I only need to worry about it going forward? I honestly haven't driven it long enough to know of any coolant leaks yet. I only notice oil on the underside of the car and some on my garage floor. Good oil pressure on the gauge and good temp there too.
As for the 0331, does a good compression test mean it hasn't happened yet, and I only need to worry about it going forward? I honestly haven't driven it long enough to know of any coolant leaks yet. I only notice oil on the underside of the car and some on my garage floor. Good oil pressure on the gauge and good temp there too.
CF Veteran
Joined: Nov 2017
Posts: 3,700
Likes: 238
From: Groton, MA
Year: 1995
Model: Cherokee(XJ)
Engine: I6 4.0L
A full detail of identifying whether you have the defective 0331 or a properly replaced one.
Edit - Oil analysis is a good idea regardless of whether the defective head has been replaced or not.
