86 CGT tapping engine

[Mark Donohoe]

After completing the timing belt job, I started the engine to see how it
sounded.  The engine will tap for 15-20 minutes while sitting in the
garage before it quietens.  Do you think this is lifter noise and what
might be the cause?  Some backgound info about this car:  116,000 miles,
sat in a guy's driveway for years, rarely being driven.  Could there be
something wrong with the oil pump?  When the tapping stops, it sounds
great.  Any ideas here?

Mark Donohoe