1986-1987 Production Turbo Block 3.8 Liter
Casting number 25526109



86-87 Production Block Top View
86=-87 Production Block Side View
Features of Note:
  • Notice the solid lifter valley with holes drilled for oil return.
  • Notice the knock sensor provision ( hole on right side of picture)
Features of Note:
  • Notice the four bolt holes per cylinder
  • Notice the flat boss for a water jacket drain between the freeze plugs.



86-87 Production Block Bottom View
86-87 Production Block Front View
Features of Note:
  • Rear main is pretty beefy (left side of picture)
  • Oil Pickup mount is at the top and right side of picture
Features of Note:
  • Notice turbo oil return hole (top left of block)
  • Cam oil galleries are to either side of cam journals (no plugs in picture)

Submitted by:

Ken Mosher