CAMSHAFT INSPECTION

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Caution
•  If the exhaust camshaft is replaced, replace all of the rocker arms (No.2) at the same time. (Only vehicles with IDEVA)

1.   Set the No.1 and No.5 journals of the camshaft on V-blocks.

2.   Measure the camshaft runout using the dial gauge.

•  If it exceeds the maximum specification, replace the camshaft.
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Maximum camshaft runout
0.030 mm {0.0012 in}

3.   Measure the cam height using the micrometer as shown in the figure.

•  For the exhaust camshaft of the vehicles with IDEVA, inspect the 3 types of cams (normal cam, high lift cam, low lift cam).
•  If it is less than the minimum specification, replace the camshaft.

Vehicles with IDEVA

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Vehicles without IDEVA

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Standard cam height [Intake camshaft]
34.43 mm {1.356 in}
Standard cam height [Exhaust camshaft]
Normal cam: 40.46 mm {1.593 in}
High lift cam [Vehicles with IDEVA]: 38.23 mm {1.505 in}
Low lift cam [Vehicles with IDEVA]: 36.76 mm {1.447 in}
Minimum cam height [Intake camshaft]
34.23 mm {1.348 in}
Minimum cam height [Exhaust camshaft]
Normal cam: 40.39 mm {1.590 in}
High lift cam [Vehicles with IDEVA]: 37.78 mm {1.487 in}
Low lift cam [Vehicles with IDEVA]: 36.69 mm {1.444 in}

4.   Measure the journal diameter using the micrometer. Measurement positions total four and are in the X and Y directions, at two points (A and B) as shown in the figure.

•  If it is less than the minimum specification, replace the camshaft.
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Note
•  The journal diameter of only the exhaust camshaft No.1 journal differs.
Standard camshaft journal diameter [Intake camshaft]
25.950—25.975 mm {1.0217—1.0226 in}
Standard camshaft journal diameter [Exhaust camshaft]
No.1 journal: 33.950—33.975 mm {1.3367—1.3375 in}
Except No.1 journal: 25.950—25.975 mm {1.0217—1.0226 in}
Minimum camshaft journal diameter [Intake camshaft]
25.920 mm {1.0205 in}
Minimum camshaft journal diameter [Exhaust camshaft]
No.1 journal: 33.920 mm {1.3354 in}
Except No.1 journal: 25.920 mm {1.0205 in}

5.   Measure the camshaft journal oil clearance using the following procedure:

(1)  Clean the camshaft journal and the journal receptacle part.
(2)  Put the camshaft on the cylinder head with the rocker arm detached.
(3)  Cut the plastigauge to the same length as the journal width and position it parallel to the camshaft.
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(4)  Install the camshaft caps. (See CYLINDER HEAD ASSEMBLY (II).)
(5)  Remove the camshaft caps. (See CYLINDER HEAD DISASSEMBLY (I).)
(6)  Measure the camshaft journal oil clearance.
•  If it exceeds the maximum specification, replace the cylinder head.
Standard camshaft journal oil clearance [Intake camshaft]
0.025—0.071 mm {0.0010—0.0027 in}
Standard camshaft journal oil clearance [Exhaust camshaft]
No.1 journal: 0.025—0.075 mm {0.0010—0.0029 in}
Except No.1 journal: 0.025—0.071 mm {0.0010—0.0027 in}
Maximum camshaft journal oil clearance [Intake camshaft]
0.101 mm {0.00398 in}
Maximum camshaft journal oil clearance [Exhaust camshaft]
0.105 mm {0.00413 in}

6.   Measure the camshaft end play using a dial gauge.

•  If it exceeds the maximum specification, replace the cylinder head or camshaft.
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Standard camshaft end play
0.087—0.207 mm {0.0035—0.0081 in}
Maximum camshaft end play
0.98 mm {0.039 in}