1989 Range Rover Classic
I recently had a top-hatted custom 4.6L built for my range rover classic, and while it runs great, tons more power and good oil pressure, I've noticed this knocking sound that appeared after about 500 miles, and has steadily gotten louder (now at about 800 miles). I don't think it's the bottom end (rod bearing or something), since the oil pressure is 50psi when cold, 30psi when hot at idle, so is it piston slap perhaps? Or something else? I took it back to my engine builder and he says he can't hear anything wrong, and my dad says he can barely hear anything, but I swear I certainly can, can any of you? What is it??? The motor is under warranty and the shop that built it is very accommodating/willing to help, but they say they can't hear anything wrong. The first video is at idle, the second is while driving (phone taped under the hood, bad sound starts at the 30 second mark).