Camshaft, Engine
Camshaft Runout
1. Put V block on precise flat bed, and support No. 2 and No. 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 a dial indicator vertically to No.3 journal.
3. Turn camshaft to one direction with hands, and measure camshaft runout on a dial indicator. (Total indicator reading)
Limit 0.02 mm (0.0008 inch)
^ If it exceeds the limit, replace camshaft.
Camshaft Cam Height
^ Measure camshaft cam height.
Standard:
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)
^ If it exceeds the limit, replace camshaft.
Camshaft Journal Oil Clearance
CAMSHAFT JOURNAL OUTER DIAMETER
^ Measure outer diameter of camshaft journal with a micrometer.
Standard:
No. 1 25.938 - 25.955 mm (1.0212 - 1.0218 inch)
No. 2, 3, 4, 5 25.953 - 25.970 mm (1.0218 - 1.0224 inch)
CAMSHAFT BRACKET INNER DIAMETER
^ Tighten camshaft bracket bolt with specified torque. Refer to "INSTALLATION" for the tightening procedure.
^ Measure the inner diameter "A" of camshaft bracket with an inside micrometer.
Standard 26.000 - 26.021 mm (1.0236 - 1.0244 inch)
CAMSHAFT JOURNAL OIL CLEARANCE
^ (Journal oil clearance) = (Camshaft bracket inner diameter) - (Camshaft journal outer diameter)
Standard:
No.1 0.045 - 0.083 mm (0.0018 - 0.0033 inch)
No. 2, 3, 4, 5 0.030 - 0.068 mm (0.0012 - 0.0027 inch)
^ If out of the standard, replace either or both camshaft and cylinder head.
NOTE: It is impossible to replace only camshaft bracket as camshaft bracket is manufactured with cylinder head. Replace the whole cylinder head assembly.
Camshaft End Play
1. Install camshaft in cylinder head. Refer to "CAMSHAFT" for tightening procedure.
2. Install a dial indicator in thrust direction on front end of camshaft. Measure the camshaft end play 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 standard.
- 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
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 No. 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 camshaft sprocket runout with a 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 or adjusting shim.
^ When replacing adjusting shim. Refer to "Valve Clearance".
Valve Lifter Clearance
VALVE LIFTER OUTER DIAMETER
^ Measure outer diameter of valve lifter with a micrometer.
Standard 33.965 - 33.975 mm (1.3372 - 1.3376 inch)
VALVE LIFTER HOLE DIAMETER
^ Measure inner diameter of valve lifter hole of cylinder head with an 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 - 0.051 mm (0.0010 - 0.0020 inch)
^ If 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