Hey all, '94 e150 with a 4.9l 6, 190k. Doesn't use any oil and mostly runs ok. The valves don't make any noise at idle, while accelerating or decelerating. But when going down a hill (especially at highway speed), and the van "catches up with the engine" so there's no load, there's a godawful clattering until I either let off a bit or give it enough gas to put a load on the engine again. Any idea what would cause that? Thanks!
if he looks into changing the lifters, he'll have the valve cover off in the process, and at least take a look around. i've put 300s through hell and never had a valve spring problem, nor have i heard of it being a common problem with 300s. but i have had lifter problems on them