Camshaft, Engine
INSPECTION AFTER REMOVALCamshaft Runout
1. Put V-block on precise flat table, and support No. 2 and 5 journal of camshaft.
CAUTION: Do not support journal No. 1 (on the side of camshaft sprocket) because it has a different diameter from the other four locations.
2. Set dial indicator vertically to No. 3journal.
3. Turn camshaft to one direction with hands, and measure the camshaft runout on dial indicator. (Total indicator reading)
Limit: 0.02 mm (0.001 inch)
4. If it exceeds the limit, replace camshaft.
Camshaft Cam Height
1. Measure the camshaft cam height with micrometer.
Standard cam height
Intake 44.865 - 45.055 mm (1.7663 - 1.7738 inch)
Exhaust 43.925 - 44.115 mm (1.7293 - 1.7368 inch)
Cam wear limit: 0.2 mm (0.008 inch)
2. If wear exceeds the limit, replace camshaft.
Camshaft Journal Oil Clearance
CAMSHAFT JOURNAL DIAMETER
^ Measure the outer diameter of camshaft journal with micrometer.
Standard:
No. 1 25.938 - 25.955 mm (1.0212 - 1.0218 inch)
No.2, 3, 4: 25.953 - 25.970 mm (1.0218 - 1.0224 inch)
CAMSHAFT BRACKET INNER DIAMETER
^ Tighten camshaft bracket bolt with the specified torque.
^ Measure the inner diameter A of camshaft bracket with bore gauge.
Standard: 26.000 - 26.021 mm (1.0236 - 1.0244 inch)
CAMSHAFT JOURNAL OIL CLEARANCE
^ (Oil clearance) = (Camshaft bracket inner diameter) - (Camshaft journal diameter).
Standard:
No. 1 0.045 - 0.083 mm (0.0018 - 0.0033 inch)
No.2, 3, 4: 0.030 - 0.068 mm (0.0012 - 0.0027 inch)
^ If the calculated value out of the standard, replace either or both camshaft and cylinder head.
NOTE: Camshaft bracket cannot be replaced as a single part, because it is machined together with cylinder head. Replace whole cylinder head assembly.
Camshaft End Play
^ Install dial indicator in thrust direction on front end of camshaft. Measure the end play of dial indicator when camshaft is moved forward/backward (in direction to axis).
Standard: 0.115 - 0.188 mm (0.0045 - 0.0074 inch)
^ Measure the following parts if out of the limit.
^ Dimension A for camshaft No. 1 journal
Standard: 30.500 - 30.548 mm (1.2008 - 1.2027 inch)
^ Dimension B for cylinder head No. 1 journal bearing
Standard: 30.360 - 30.385 mm (1.1953 - 1.1963 inch)
^ Refer to the standards above, and then replace camshaft and/or cylinder head.
Camshaft Sprocket Runout
1. Put V-block on precise flat table, and support No. 2 and 5 journal of camshaft.
CAUTION: Do not support journal No. 1 (on the side of camshaft sprocket) because it has a different diameter from the other four locations.
2. Measure the camshaft sprocket runout with dial indicator. (Total indicator reading)
Limit: 0.15 mm (0.0059 inch)
^ If it exceeds the limit, replace camshaft sprocket.
Valve Lifter and Adjusting Shim
Check if surface of valve lifter and adjusting shim has any wear or cracks.
^ If anything above is found, replace valve lifter.
^ When replacing adjusting shim, refer to EM-224, ADJUSTMENT.
Valve Lifter Clearance
VALVE LIFTER OUTER DIAMETER
^ Measure the outer diameter of valve lifter with micrometer.
Standard: 33.965 - 33.975 mm (1.3372 - 1.3376 inch)
VALVE LIFTER HOLE DIAMETER
^ Measure the inner diameter of valve lifter hole of cylinder head with inside micrometer.
Standard: 34.000 - 34.016 mm (1.3386 - 1.3392 inch)
VALVE LIFTER CLEARANCE
^ (Valve lifter clearance) = (Valve lifter hole diameter) - (Valve lifter outer diameter)
Standard: 0.025 - 0.51 mm (0.0010 - 0.0200 inch)
^ If the calculated value is out of the standard, referring to each standard of valve lifter outer diameter and valve lifter hole diameter, replace either or both valve lifter and cylinder head.
CAMSHAFT AND CAMSHAFT BEARING:
CAMSHAFT AND CAMSHAFT BEARING