Cylinder Head(s)

If a cylinder head (6049) is to be replaced, refer to Cylinder Head in the Disassembly and Assembly portion of this section, and transfer all valves, valve springs (6513), spark plugs (12405), etc., to the new cylinder head. Clean and inspect all parts, and reface the valves. Refer to Section 03-00. Check all assembly clearances before assembling the new or used parts to the new cylinder head.

Removal

1. Remove the upper and lower intake manifold (9424).

2. Remove the valve cover (6582).

3. Lift tensioner and remove drive belt (8620). Remove the engine air cleaner intake tube (9A624) from the left cylinder head assembly.

   If the left cylinder head is being removed, remove the air conditioning compressor/power steering bracket at the front of the cylinder head, complete with accessories. Remove oil level dipstick (6750) and oil level indicator tube (6754) assembly and speed control bracket, if so equipped.

4. Disconnect the generator wiring harness and secondary air injection pump hoses, if the right cylinder head is to be removed. Remove the three bolts attaching the generator/secondary air injection pump bracket to the cylinder head. Remove the generator, secondary air injection pump (AIR pump) (9A486) and bracket as an assembly from the engine (6007).

5. Disconnect the exhaust manifold(s) from the muffler inlet pipe(s).

6. Loosen the rocker arm seat bolts so that the rocker arms (6564) can be rotated to the side. Remove the push rods (6565) in sequence so that they may be installed in their original positions.

   

7. Disconnect the secondary air injection manifold tubes (9B449) at the check valves and plug the check valve.

8. Install the cylinder head holding fixtures. Remove the cylinder head attaching bolts and lift the cylinder head off the cylinder block (6010). Remove and discard the head gasket (6051).

Installation

1. Clean the cylinder head, intake manifold, valve cover and cylinder head gasket surfaces. If the cylinder head was removed for a head gasket replacement, check the flatness of the cylinder head and block gasket surfaces. Refer to Section 03-00.

2. NOTE: Do not apply sealer to a composition gasket.

   A specially treated composition gasket is used. Position the new head gasket over the cylinder dowels on the cylinder block. Position the cylinder head on the cylinder block and install the attaching bolts. Remove the holding fixtures.

3. The cylinder head bolts are tightened in two steps for all 5.8L engines, and three steps (torque-to-yield method) for the 5.0L engine.

   • For all 5.8L engines, tighten head bolts as follows:
   • Tighten all bolts in sequence to 129-142 Nm (95-105 lb-ft).
   • Tighten all bolts in sequence to 143-151 Nm (105-112 lb-ft).
   • 5.0L engine
   • Tighten all bolts in sequence to 34-47 Nm (25-35 lb-ft).
   • Tighten all bolts in sequence to 61-75 Nm (45-55 lb-ft).
   • Turn all bolts in sequence an additional 85-95 degrees.

   When cylinder head bolts have been tightened following this procedure, it is not necessary to retighten the bolts after extended operation. However, the bolts may be checked and retightened if desired.

   

4. NOTE: Do not attempt to straighten push rods.

   Clean the push rods in a suitable solvent. Blow out the oil passage in the push rod with compressed air. Check the ends of the push rods for nicks, grooves, roughness or excessive wear. Visually check the push rods for straightness or check push rod runout with a dial indicator. Refer to Section 03-00. If runout exceeds the maximum limit at any point, discard the push rod.

5. Lubricate the end of the push rods with Multi-Purpose Grease D0AZ-19584-AA or equivalent meeting Ford specifications ESB-M1C93-B or ESR-M1C159-A and install them in their original positions. Apply Multi-Purpose Grease D0AZ-19584-AA or equivalent meeting Ford specifications ESR-M1C159-A and ESB-M1C93-B to the valve stem tips.

6. Lubricate the rocker arms and rocker arm seats (6A528) with Multi-Purpose Grease D0AZ-19584-AA or equivalent meeting Ford specification ESR-M1C159 or ESB-M1C93-B, then install the rocker arms.

   

   Item	Part Number	Description
   1	390385	Attaching Bolt
   2	6A528	Rocker Arm Seat
   3	6564	Rocker Arm
   4	6A588	Rocker Arm Fulcrum Guide
   5	—	Threaded Pedestal (Part of 6049)

7. Connect the exhaust manifold(s) at the muffler inlet pipe(s). Tighten the nuts to 35-45 Nm (26-36 lb-ft).

8. If the right cylinder head was removed, install the secondary air injection pump generator bracket and accessories on the right cylinder head. Refer to Section 03-05 to install serpentine drive belt and auto tensioner.

   If the left cylinder head was removed, install the power steering and air conditioning compressor bracket, with accessories at the front of the cylinder head. Install the oil level dipstick and oil level indicator tube assembly and speed control bracket, if so equipped.

9.  CAUTION: Do not use solutions such as brake cleaner, carburetor cleaner, etc., as these solutions can leave a residue on the machined surfaces. Use only a cleaner which meets or exceeds Ford specification WSE-M5B392-A, such as Metal Surface Cleaner F4AZ-19A536-RA or equivalent.

   Clean the valve cover gasket surfaces. Place the new gaskets on the cylinder head mating surfaces. Install the valve covers.

10. Install the upper and lower intake manifolds and related parts.

11. Install the secondary air injection manifold tube at the rear of the cylinder heads. Reconnect the air supply hose to the secondary air injection pump (F-150), unplug the check valve and connect the secondary air injection air supply hose.