Engine - Coolant Loss/Cracked Cylinder Head

Number: 84-142

Section: 6 (VI)

Date: June, 1984
Subject: CRACKED CYLINDER HEAD ON 1.8L (L46 AND LJ9) AND 2.0L (LQ5, LQ2, AND LR9) L4 ENGINES


Model and Year: 1982-84 CAVALIER AND "S/T" TRUCKS
TO: ALL CHEVROLET DEALERS

ILLUSTRATION #1 - Intake Valve Spring Seat Area:

Some Cavalier and "S/T" truck engines may develop coolant loss which may be due to a cracked cylinder head. The crack develops across the #6 intake valve spring seat area and continues across and behind the #4 and #5 exhaust valve spring seat. With the aid of dye check, the crack is visible to the unaided eye (see illustration #1).