Engine – Block Identification

1975-1980 20R:

  • Deck Height 11.280" (Pan Rail to Top of Deck)
  • Deck Height 9.120" (Crankshaft Center to Top of Deck)
  • Stock Bore 88.5MM - 3.484"
  • Max Overbore 90MM - 3.544"

1981-1984 22R / RE:

  • Deck Height 11.280" (Pan Rail to Top of Deck)
  • Deck Height 9.120" (Crankshaft Center to Top of Deck)
  • Stock Bore 92MM - 3.622"
  • Max Overbore 94MM - 3.701"
  • Turbo Max Overbore 93MM - 3.661"

1985 - 1995 22R / 22RE "Laser Block"

  • Deck Height 11.090" (Pan Rail to Top of Deck)
  • Deck Height 8.950" (Crankshaft Center to Top of Deck)
  • Stock Bore 92MM - 3.622"
  • Max Overbore 94MM - 3.701"
  • Turbo Max Overbore 93MM - 3.661"

NOTES:

  • Early 81-84 22R - 22RE and Late 85-95 22R / 22RE Engine Blocks: Cylinder Heads DO NOT INTERCHANGE without considerable modifications.
  • For increased timing chain durability, ALL 1981 - 1984 should be converted to a double row timing chain, use oil pump drive and 20R - 1981 22R timing component set. For 1985 - 1995 engines, use timing chain conversion kit.

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