Puzzle: Oil Burning 4Kcsq

[ptimmerm@mashtun.jpl.nasa.gov]

This is a posting for a friend.  He has a 4kcsq with
286K on the clock.  He lost his cooling system a while
back and didn't get it stopped in time.  He had head
warpage at that time.  The oil heated and foamed as well,
so he says.  Anyhow he lost oil pressure.  After getting
it all put back together, he now has hydraulic valve clatter
which last much longer than ussual, and has progressively 
higher oil consumption.  Now up to 150 miles / quart!
Compression is at 170 for all five cylinders.  No blow
by is noted with the fill cap off.  

I have my ideas, but would like to hear others thoughts, thanks.

paul t-