1986-1987 Production Heads 3.8 Liter
Casting number 25518445

TOP

COMBUSTION CHAMBER

Features of Note:
  • Notice the typical Buick shaft mounted rockers
  • Notice valve cover bolts on the outside rails vs. center holes in FWD covers
  • Cast number (red oval)
Features of Note:
  • Notice the four bolt holes per cylinder
  • Notice the bridged water passages at the end of the head decks

EXHAUST SIDE

INTAKE SIDE

Features of Note:
  • Square exhaust ports
Features of Note:
  • Tall retangular intake ports
  • EGR provision in the center of the head

Submitted by:

Ken Mosher
kenmosher@home.com