Cylinder Head: Assembly

WARNING: This page is about a different variant/trim than selected.

NOTE: If installing the original valves, make sure the valves are installed in the same position from which they were removed. Coat the valve stems with clean engine oil.

Lubricate and install the intake and exhaust valves.

Material: Engine Oil - SAE 5W-20 - Synthetic Blend Motor Oil / XO-5W20-Q1SP (WSS-M2C945-B1)

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NOTE: Use valve stem seal pliers (such as BeTooll HW0107 or equivalent).
- Lubricate the valve stem seal with clean engine oil.
  Material: Engine Oil - SAE 5W-20 - Synthetic Blend Motor Oil / XO-5W20-Q1SP (WSS-M2C945-B1)
- Use commercially available valve stem seal pliers to install the valve stem seal.
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NOTE: Use a small screwdriver and multi-purpose grease to install the valve collets.

Using the special tools, install the valve springs, valve spring retainers and the valve collets. Use Special Service Tool: 303-300 (T87C-6565-A) Set, Valve Spring Compressor., 303-350 (T89P-6565-A) Compressor, Valve Spring., 303-472 (T94P-6565-AH) Adapter, Valve Spring Compressor., 303-1249 Valve Spring Compressor.

Material: Motorcraft® Multi-Purpose Grease Spray / XL-5-A (ESB-M1C93-B)

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NOTE: Only use hand tools when removing or installing the spark plugs, or damage can occur to the cylinder head or spark plug.

Install the spark plugs.

Torque: 115 lb.in (13 Nm)

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Install the cylinder head plug.
Torque: 21 lb.ft (29 Nm)

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Install the bracket and the bolt.
Torque: 17 lb.ft (23 Nm)

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Install a new CHT sensor.
Torque: 89 lb.in (10 Nm)

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Visually inspect the intake manifold gasket for nicks, cuts and abrasions. If these conditions are not present, the gaskets may be re-used.

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NOTE: Apply threadlock 262 to the intake manifold bolt threads.

Install the intake manifold and tighten the bolts in sequence shown.

Material: Motorcraft® Threadlock 262 / TA-26 (WSK-M2G351-A6)

Torque: Stage 1: Tighten bolts 1 and 2 to: : 18 lb.in (2 Nm) Stage 2: Tighten bolts 3 and 4 to: : 18 lb.in (2 Nm) Stage 3: Tighten bolts 1 and 2 to: : 159 lb.in (18 Nm) Stage 4: Tighten bolts 3, 4, 5 and 6 to: : 89 lb.in (10 Nm) Stage 5: Retighten bolts 1 and 2 to: : 159 lb.in (18 Nm) Stage 6: Retighten bolts 3, 4, 5 and 6 to: : 89 lb.in (10 Nm)

Fig 1: Intake Manifold Bolts Tightening Sequence
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Verify that the CAC seal remains correctly located.

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1. Install the CAC, the bolts and the stud bolts.
2. Hand tighten bolts 7 and 10.
3. Hand tighten the remaining bolts.
4. Tighten the bolts and the stud bolts.
  Torque: 89 lb.in (10 Nm)
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Lubricate with clean engine oil and install the valve tappets.
Material: Engine Oil - SAE 5W-20 - Synthetic Blend Motor Oil / XO-5W20-Q1SP (WSS-M2C945-B1)

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NOTE: Failure to position the cylinder head on wooden blocks may cause cylinder head damage.

NOTE: Make sure that the valves are clear of the wooden blocks.

Position the cylinder head on wooden blocks. Use the General Equipment: Wooden Block
NOTE: Failure to follow the camshaft tightening procedure can result in damage to the camshafts.

NOTE: Make sure that the camshafts and camshaft bearing caps are installed in their original locations or damage to the engine may occur.

NOTE: Make sure that the mating faces are clean and free of foreign material.

NOTE: Apply clean engine oil to the bearing surfaces of the camshafts, camshaft bearing caps and the VCT bridge.
- Tighten the bolts evenly, half a turn at a time, until the camshaft bearing caps and the VCT bridge are seated against the cylinder head.
  Material: Engine Oil - SAE 5W-20 - Synthetic Blend Motor Oil / XO-5W20-Q1SP (WSS-M2C945-B1)
  
  Torque: Stage 1: Tighten bolts 1 through 16 to: : 62 lb.in (7 Nm) Stage 2: Tighten bolts 17 through 20 to: : 89 lb.in (10 Nm) Stage 3: Tighten bolts 1 through 16 an additional: : 45 deg. | Stage 4: Tighten bolts 17 and 18 an additional: : 70 deg. | Stage 5: Tighten bolts 19 and 20 an additional: : 53 deg.
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1. Using the flats of the camshaft, rotate the camshaft to place the cam lobe at base circle, with the lobe pointed away from the tappet.
2. Use a feeler gauge to measure the clearance of each valve and record its location. Use the General Equipment: Feeler Gauge
3. Repeat to measure all of the lobe/tappet clearances.
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NOTE: Select tappets using this formula: ideal tappet thickness = measured clearance + the existing tappet thickness - nominal clearance. Select the closest tappet size to the ideal tappet thickness available and mark the installation location.

NOTE: The nominal clearance is 0.0112 in (.285 mm) for intake and 0.0167 in (.425 mm) for exhaust.

NOTE: The acceptable clearances after being fully installed is 0.009-0.013 in (.24-.33 mm) for intake and 0.015-0.019 in (.38-.47 mm) for exhaust.
NOTE: Failure to follow the camshaft loosening procedure can result in damage to the camshafts.

NOTE: Note the location and orientation of each camshaft bearing cap and the position of the camshaft lobes on the No. 1 cylinder for installation reference.
- Loosen the camshaft bearing caps 2 turns at a time until all tension is released from the camshaft bearing caps in sequence shown.
- Remove the bolts and the camshaft caps.
- Remove the camshafts.
- Discard the bolts.

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