302 V8 Valve Lifter question
#1
#2
#3
#4
If it's a dull lifter noise, I wouldn't worry about it. My 91 Bronco 5.0 has had a dull lifter noise since it had 19 miles on it when I bought it. The dealer said it's normal noise. I guess they were right as it now has over 123,000 noisy miles on it. If it's more of a clatter or metallic noise, you gotta problem. These lifters can also collapse which means the oil cup won't return back to the top of the lifter. It won't pump much oil to the rocker and will be a hard noise. One way to find out is to run the engine at idle with the suspected valve cover off. It's messy but you know what's going on by watching for oil at the rockers.