OK its an old caravan! An 86 with a 2.2 mileage unknown. Its making a knocking noise that to me sounds like loose rod bearings. I see that people are saying that this engine is prone to pistons slap or wrist pins. If that is or was the case why didn't Chrysler fix the problem in production. Most engines don't incounter this problem. Anyway I just bought a set of new rod bearings for 25 bucks and plan on installing them tomorrow. I'll let you know how it goes. P.S. I drive it daily and it has no guage just a oil light that doesn't come on.