Tech Notes:
Engine Block Identification

1975-1980
20R

      1981-1984
22R / RE
     

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

                 

Deck Height 11.280"
(Pan Rail to Top of Deck)

          Deck Height 11.280"
(Pan Rail to Top of Deck)
       

Deck Height 11.090"
(Pan Rail to Top of Deck)


     
     

Deck Height 9.120"
(Crankshaft Center to Top of Deck)

      Deck Height 9.120"
(Crankshaft Center to Top of Deck)
     

Deck Height 8.950"
(Crankshaft Center to Top of Deck)


     
     

Stock Bore 88.5MM - 3.484"

      Stock Bore 92MM - 3.622"      

Stock Bore 92MM - 3.622"


     
     

Max Overbore 90MM - 3.544"

      Max Overbore 94MM - 3.701"      

Max Overbore 94MM - 3.701"

        Turbo Max Overbore
93MM - 3.661"
     

Turbo Max Overbore
93MM - 3.661"

                 

Note:  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.


Return to TECH NOTES Main Page