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Home >> Cadillac >> 2019 >> CT6 V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.2L (LTA) - Repair Instructions >> Repair Instructions >> Spark Plug Replacement
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Spark Plug Replacement

GM5187944Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
Preliminary Procedure 
Remove ignition coils as necessary.
1 Spark Plug [8x]

Procedure

  1. Loosen each spark plug 1 or 2 turns.
  2. Use a brush, or compressed air in order to remove any dirt from the spark plugs.
  3. Remove the spark plugs (1) one at a time and place each plug in a tray marked with the corresponding cylinder numbers.

Tighten 
16 N.m (12 lb ft)