F 150 Heritage 4WD Pickup V8-5.4L CNG VIN M (2004)
Camshaft: Technical Service Bulletins
Engine - Camshaft/Valve Lash Adjuster Design Change
TSB 04-24-24
12/13/04
CAMSHAFT AND LASH ADJUSTER DESIGN
CHANGE - 5.4L 3V ENGINE
FORD:
2004-2005 F-150
ISSUE
The 5.4L 3-valve engine lash adjuster and camshaft design has been modified for the 2005 model year (MY). Do not use 2005 MY parts when servicing
a 2004 MY engine, or 2004 MY parts when servicing a 2005 MY engine. If parts are intermixed during a service repair, the engine may exhibit noises
on affected cylinders and engine damage may result.
ACTION
Order and install parts for the correct model year engine. The following Inspection Procedure can also be used to visually confirm the application of a
part.
NOTE
THE ENGINE MODEL YEAR SHOULD BE CONFIRMED BY CHECKING THE ENGINE TAG LOCATED ON THE VALVE COVER. A 2004
MY ENGINE WILL HAVE CODE 4G-692-AA AND A 2005 MY ENGINE WILL BE IDENTIFIED AS 5G-692-AA.
INSPECTION PROCEDURE
2004 and 2005 MY camshafts can be visually identified by the location of the variable cam timing phaser (VCT) pin notch in relation to the machining
lug, as seen on the end of the camshafts (Figures 1-2).
