2000 Sunbird L4-121 2.0L VIN B 2-bbl (1984)
Lifter / Lash Adjuster: Technical Service Bulletins
Engine - Oversize Tappet Bores
Number 84-6 (Gasoline)-9A
Date 12/83
Subject:
OVERSIZE TAPPET BORES - 1983-84 2.0L LQ5 J2000 ENGINES
"Please discard previous bulletin 84-6 (Gasoline)-9".
Some Tonawanda built 2.0L L-4 LQ5 engines may have been produced with 0.26 mm oversize tappet bores. The oversize tappet bore is identified with a
vertical stripe of white paint on both sides of the tappet bore inside the tappet cavity. In addition, the cylinder block has a steel stamp with ".26 OS" on
the top right front machining pad. If one of the oversize hydraulic valve lifters requires replacement, use part number 5233545.