Engine - Oversize Tappet Bores

Number: 84-29

Section: 6A (VI)

Date: Dec., 1983
Subject: OVERSIZE TAPPET BORES ON
2.0L LQ2 AND LQ5 ENGINES


Model and Year: 1983-84 CAVALIER
TO: ALL CHEVROLET DEALERS


Some Tonawanda built 2.0L L4 LQ2 and 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 P/N 5233545.