Does my lousy sounding 4.0 need a rebuild?
I am sure that someone has asked about this but I couldn't find it. Why does the Jeep 4.0 six get so noisy as it ages? The engine in my '99 Cherokee (170,000 miles) rattles and knocks but every Jeep guy I talk to says "it's normal - just keep driving it." I really depend on this Jeep and I don't want to end up stuck somewhere with a thrown rod or something. The engine has good compression, good oil pressure, doesn't burn much oil, and makes good power for what it is. How do I tell if this engine needs rebuilding?