Best ways are to checkc oil pressure by mechanical gauge, if it's low something is going on in the bottom end. If you short out each cylinder one at a time then that wold tell you it's aproblem in the cylinder that you tested. Menaing rod bearing or piston. But if the sound doesn't change when you incresase or decrease the rpm it 's hard telling what it is. Eng trans problems should increase or decrease as rpm goes up or down. It cold be lifter or valve guide noise. It cold also be piston slap but that wold increase or decrease with rpm. It might be a wrist pin but shorting the cylinder would let you know that. Fords never really had cam problems like chevys so I don't think so without actually hearing it and doing tests can't tell you much. One thing that i'm pounding my brain here is there was some problem with carbon brekaing off pistons and making noise, normally a decarbonizer fixed that. It's the same at ford or gm dealers you spray in carb let soak for a couple hours and then start the car an ddrive it.
Sunday, April 22nd, 2012 AT 9:05 PM