Engine is identified by eighth character of Vehicle Identification Number (VIN). See ENGINE IDENTIFICATION CODES table. VIN is located on top of instrument panel, near lower left corner of windshield. VIN is also stamped on Vehicle Certification (VC) label mounted on left door pillar.
Ford Super Duty Engine code labels are located in engine compartment, in front of radiator and on right valve cover. Label contains engine calibration number, engine build date, engine plant code and engine code. Emission calibration number label is located on upper radiator shield. This label identifies engine calibration number, engine code number and revision level. Numbers from labels are required when ordering replacement parts.
Ford Super Duty Service manual Windsor and Romeo engine plants are producing the 4.6L engine. There are several differences between these engines and many parts are not interchangeable. The best way to determine manufacturer is by the VIN number. VIN W is a Romeo engine. VIN 6 is Windsor engine. There are a couple external differences. The right valve cover on Windsor engine has 14 bolts, Romeo engine has 11 bolts. Also on Windsor engine there is a W stamped on each valve cover in area of camshaft sprocket.
FUEL PRESSURE RELEASE & FUEL LINE CONNECTIONS
- Remove fuel cap to release fuel tank pressure. Connect EFI Pressure Gauge (T80L-9974-B) to relief valve on right rear corner of fuel rail. Release pressure using valve on pressure gauge.
- Before disconnecting fuel lines, disconnect negative battery cable. To disconnect fuel lines, remove retaining clip from outside of fuel line coupling.
- Install Spring Lock Coupling Remover (D87L-9280-A) for 3/8" line or (D87L-9280-B) for 1/2" line on fuel line coupling so it enters cage opening. See Fig. 1 .
- Push spring lock coupling remover into cage opening to release female fitting from garter spring. Pull couplings apart. Remove spring lock coupling remover.
- When installing fuel lines, fit NEW fuel resistant "O" rings (Brown) on fuel lines. Before installing, lightly coat "O" rings with clean engine oil. Clean fittings, and replace garter spring (if necessary).
- Install female fitting to male fitting and push until garter spring snaps over flared end of female fitting. Ensure lines lock together and garter spring is over female fitting flared end.
- Install retaining clip. Install Black retaining clip on fuel supply line and Gray clip on fuel return line. Ensure horseshoe portion of clip is over coupling. DO NOT install retaining clip over rubber fuel line.
VALVE COVERS Removal (Left)
Disconnect negative battery cable(s). Remove air cleaner. On Expedition, Navigator and F150, unbolt power steering reservoir bracket and position reservoir, and bracket assembly aside. On all models, disconnect PCV hose from valve cover. Remove EGR manifold tube. Disconnect fuel injection electrical connections. Loosen valve cover retaining bolts. Retaining bolts are part of valve cover and should not be removed. Remove valve cover and gasket.
VALVE COVERS Removal (Right)
On E150, remove air cleaner, oil filler tube and engine cover. On all models, disconnect PCV valve hose from valve cover. Disconnect electrical connections as necessary. Disconnect heater water hose. Loosen valve cover 1999 Ford Pickup F350 Super Duty 1998-99 ENGINES 4.6L V8 - VIN W & 6 Helpme learn Repair Manuals Friday, November 24, 2006 4:21:23 PM Page 16 © 2004 Mitchell Repair Information Company, LLC. retaining bolts. Retaining bolts are part of valve cover and should not be removed. Remove valve cover and gasket.