Engine "Tick"

I agree one of the lifters. They are hydraulic, on a 318'which means they pump up with oil. That's why sometimes the noise goes away when the engine warms up ie. The oil warms up and flows easier. Now, with lifters with 115,000 miles on them and I assume a lot of age, the lifters or just one lifter isn't pumping up any more, hence the ticking noise. Remedy? New lifters. Also a tic sound could come from exhaust manifold leak. You would be able to feel that with your hand on a cold motor. The other noise could be a rod knocking but that doesn't sound like a tic. However my first instinct are the lifters.