Well, I have to guess at what it sounds like, so one possibility is low oil pressure causing the lash adjusters to not pump up. You'll hear the clicking of the rocker arms but there can still be plenty of oil flowing throughout the rest of the engine. That pertains to the double overhead camshaft engine. If you have the single-cam engine, they use the old-style lifters. The clicking will be down lower in the engine.
Both engines have a timing chain that will stretch from high mileage and can rattle against the cover. You'll hear that mostly on the passenger side of the engine.
A connecting rod knock is a deeper knock, both in pitch and location.
Loose torque converter bolts will cause a metallic banging noise that may change when shifting to "drive".
Sunday, January 12th, 2014 AT 8:16 PM