Valve Clearance Adjustment

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Special Tool(s) / General Equipment

Courtesy of FORD MOTOR COMPANY	303-1604Timing Peg, Crankshaft TDC
Courtesy of FORD MOTOR COMPANY	303-1605Alignment Tool, Camshaft
Feeler Gauge

Materials

Name	Specification
Engine Oil - SAE 5W-20	WSS-M2C948-B
Motorcraft® Gasket MakerTA-16	WSK-M2G348-A5

Check

Refer to: Valve Cover .
NOTE: Only rotate the crankshaft clockwise.

Rotate the crankshaft until the corresponding piston is at TDC and then measure the valve clearance(s). Use the General Equipment: Feeler Gauge
Note down each cylinder number and the valve clearances measured.
Compare the measured valve clearance(s) with the specifications. Refer to: Specifications .

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Adjustment

NOTE: The following steps are only necessary if adjustment is required.
Remove Special Service Tool: 303-1605 Alignment Tool, Camshaft.

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Refer to General Information

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NOTE: Note the position of the components before removal.

Fig 1: Crankshaft Loosening Sequence
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- Remove the valve tappet and read the thickness from the underside.
- The number on the valve tappet indicates the thickness of the bottom of the tappet. However, the number only indicates the digits after the decimal point (example: 725 = 2.725).
- Calculate the required thickness of the valve tappet with the following formula: X = S + M - V
- Required thickness of tappet = X
- Thickness of currently fitted tappet = S
- Measurement of existing valve clearance (actual value) = M
- Desired valve clearance = V

Use the chart to determine the correct size valve tappet.

Number on underside of Tappet	Grade/Thickness
700	0.1063 in (2.7 mm)
725	0.1073 in (2.725 mm)
750	0.1083 in (2.75 mm)
775	0.1093 in (2.775 mm)
800	0.1102 in (2.8 mm)
825	0.1112 in (2.825 mm)
850	0.1122 in (2.85 mm)
875	0.1132 in (2.875 mm)
900	0.1142 in (2.9 mm)
925	0.1152 in (2.925 mm)
950	0.1161 in (2.95 mm)
975	0.1171 in (2.975 mm)
000	0.1181 in (3 mm)
025	0.1191 in (3.025 mm)
050	0.1201 in (3.05 mm)
075	0.1211 in (3.075 mm)
100	0.1220 in (3.1 mm)
125	0.1230 in (3.125 mm)
150	0.1240 in (3.15 mm)
175	0.1250 in (3.175 mm)
200	0.1260 in (3.2 mm)
222	0.1269 in (3.222 mm)
250	0.1280 in (3.25 mm)
275	0.1289 in (3.275 mm)
302	0.1300 in (3.302 mm)
325	0.1309 in (3.325 mm)
342	0.1316 in (3.342 mm)
375	0.1329 in (3.375 mm)
400	0.1339 in (3.4 mm)
425	0.1348 in (3.425 mm)
462	0.1363 in (3.462 mm)
475	0.1368 in (3.475 mm)
502	0.1379 in (3.502 mm)
525	0.1388 in (3.525 mm)
550	0.1398 in (3.55 mm)
575	0.1407 in (3.575 mm)

Install the correct valve tappet.
NOTE: Make sure that the components are installed to the position noted before removal.
Install the camshafts approximately at valve overlap position cylinder No. 1.
Material Engine Oil - SAE 5W-20 (WSS-M2C948-B)
NOTE: Install all the bolts finger tight before final tightening.

Tighten each bolt 2 turns at a time.
Torque
89 lb.in (10 Nm)

Fig 2: Camshaft Bolts Tightening Sequence
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1. Turn the camshafts to measure the valve clearance.
2. Measure the valve clearances and repeat this procedure as necessary until all valve clearances are within the specified tolerance.
NOTE: Note the position of the components before removal.

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

NOTE: The component must be installed within 5 minutes of applying the sealant.

Material Motorcraft® Gasket Maker / TA-16 (WSK-M2G348-A5)

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

NOTE: The component must be installed within 5 minutes of applying the sealant.

Material Motorcraft® Gasket Maker / TA-16 (WSK-M2G348-A5)

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NOTE: Make sure that the components are installed to the position noted before removal.
Install the camshafts approximately at valve overlap position cylinder No. 1.
Material Engine Oil - SAE 5W-20 (WSS-M2C948-B)
NOTE: Install all the bolts finger tight before final tightening.

Tighten each bolt 2 turns at a time.
Torque
89 lb.in (10 Nm)

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1. Install the special service tool and the mounting bolts loosely. Use Special Service Tool: 303-1605 Alignment Tool, Camshaft.
2. Tighten the camshaft alignment tool camshaft bolts until each camshaft is held securely.
3. Tighten the camshaft alignment tool mounting bolts.
  Torque 89 lb.in (10 Nm)
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Install Special Service Tool: 303-1604 Timing Peg, Crankshaft TDC.

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NOTE: Only rotate the crankshaft clockwise.

Rotate the crankshaft slowly until the crankshaft stops.
Remove Special Service Tool: 303-1604 Timing Peg, Crankshaft TDC.

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