engine noise ?? Whats else to try

[gr8lite]

1995 Range Rover country LWB , 125k miles


developed a tick or clatter a week ago. Sounded like lifter noise , lifters were replaced. Noise still there. Possibly rockers or rocker shafts worn? Swapped rockers and shafts from a good running , quiet, '95 4.2. Noise still there. Start the engine cold , approx 10 - 15 mins the noise starts. Sometimes goes away, comes back, etc... Shut it off for 15 mins , start up same deal.

Thoughts? A bad lifter ? The inside of this engine is clean , clean , clean. The previous owner claims only synthetic, it looks like it.

Thanks to all!

[I Leak Oil]

Could be anything. Bearings, wrist pin, broken ring, valve....How's the oil pressure? Compression? Lead down test? You sure it's internal to the motor and not something else under the hood?