Frontier 2WD L4-2.5L (QR25DE) (2005)
Camshaft: Testing and Inspection
INSPECTION AFTER REMOVAL
Camshaft Runout
1. Put V-block on a precise flat table, and support No. 2 and 5 journals of camshaft.
CAUTION: Do not support No. 1 journal (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 the camshaft runout on the dial indicator. (Total indicator reading)
Standard: Less than 0.02 mm (0.0008 inch).
4. If out of the standard, replace camshaft.
Camshaft Cam Height
1. Measure the camshaft cam height with a micrometer.
Standard:
Intake : 45.015 - 45.205 mm (1.7722 - 1.7797 inch)
Exhaust : 43.975 - 44.165 mm (1.7313 - 1.7388 inch)
Cam wear limit : 0.2 mm (0.008 inch)
2. If wear is beyond the limit, replace camshaft.
Camshaft Journal Oil Clearance
CAMSHAFT JOURNAL DIAMETER
Measure the outer diameter of camshaft journal with a micrometer.
Standard:
No.1 : 27.935 - 27.955 mm (1.0998 - 1.1006 inch)
No.2, 3, 4, 5 : 23.435 - 23.455 mm (0.9226 - 0.9234 inch)
CAMSHAFT BRACKET INNER DIAMETER