Spark Plug - Service on Engines With Aluminum Heads
Bulletin 86-6-17Date May '86
Ref. No. 86-126-6
SUBJECT: SPARK PLUG SERVICE ON ENGINES WITH ALUMINUM HEADS
MODELS AFFECTED: 1982 THROUGH 1986 MODELS EQUIPPED WITH 1.8L OHC ENGINES (VIN CODES J AND O)
Removing spark plugs from 1.8L OHC engines with aluminum heads for inspection, servicing or replacement, is a relatively simple task but it does require care and attention.
NOTICE: To remove spark plugs from engines with aluminum heads, allow the engine to cool. The heat of the engine, in combination with a spark plug that has run for many hours, may cause the spark plug to seize.
Whenever spark plugs are to be reused, the crushable design gasket, part number 5612328, must be replaced each time the spark plug is removed. The correct spark plug installation torque is 18-22 ft.lbs. (25-30 N-m).
NOTICE: Over tightening of a spark plug can cause stretching of the spark plug shell and could allow blowby to pass through the gasket seal between the shell and insulator. Over tightening also results in extremely difficult removal.