Done some searching, it appears that 4.0 engines with a casting #0331 have the habit of cracking up between #3 and #4 exhast valves.
My question is, has anybody figured out exactly which years and models are affected? Did they ever fix it? When?
What is a direct drop in replacement for the defective heads?
These heads have the newer ignition system attachments and older heads will not work without modifications.
My question is, has anybody figured out exactly which years and models are affected? Did they ever fix it? When?
What is a direct drop in replacement for the defective heads?
These heads have the newer ignition system attachments and older heads will not work without modifications.