XL-7 Limited 4WD V6-2.7L (2002)
Camshaft: Testing and Inspection
Inspection
Cam Wear
Using a micrometer, measure cam height "a". If measured height is below its limit, replace camshaft.
Intake cam height
Standard: 40.402 - 40.562 mm (1.5906 - 1.5969 inch)
Limit: 40.300 mm (1.3581 inch)
Exhaust cam height
Standard: 39.428 - 39.588 mm (1.5523 - 1.586 inch)
Limit: 39.400 mm (1.5512 inch)
Camshaft Runout
Set camshaft between two"V" blocks, and measure its runout by using a dial gauge.
If measured runout exceeds specified limit, replace camshaft.
Camshaft runout Limit: 0.04 mm (0.002 inch)
Camshaft Journal Wear
Check camshaft journals and camshaft housings for pitting, scratches, wear or damage.
If any malcondition is found, replace camshaft or cylinder head with housing. Never replace cylinder head without replacing housings.
Check clearance by using gauging plastic. The procedure is as follows.
1. Clean housings and camshaft journals.
2. Make sure that all valve lash adjusters are removed and install camshaft to cylinder head.
