Speaking of HLAs
On my last service I changed the timing belt and cam seals amongst other things and decided to clean out the HLAs.
My lifters didn't tick, but I'd heard it becomes a problem as the motor gets older.
I read somewhere (Mnet maybe) that cleaning them out stops the dreaded tick.
When I pulled them apart they had a horrible black sludge inside them.
Cleaned them with solvent degreaser, brake cleaner, then assembled them with fresh oil.
They ticked like crazy for ten minutes or so but then came right.
Here's a pic of the top off the motor as it was going back together, showing the gold colour, which I think is okay for 135,000kms (84,000 miles).