Camshaft, Camshaft Chain. Camshaft, Camshaft Cap Wear

Camshaft, Camshaft Cap Wear

The journal wear is measured using plastigage (press gauge), which is inserted into the clearance to be mea­sured. The plastigage indicates the clearance by the amount it is compressed and widened when the parts are assembled.

• Cut strips of plastigage to journal width. Place a strip on each journal parallel to the camshaft with the camshaft in­stalled in the correct position and so that the plastigage will be compressed between the journal and camshaft cap.

• Install the camshaft caps, tightening the bolts in the cor­rect sequence.

Torque -Camshaft Cap Bolts: 12 N-m (1.2 kgf-m, 8.5ft-lb)

NOTE

O Do not turn the camshaft when the plastigage is be­tween the journal and camshaft cap.

• Remove the camshaft caps again, and measure the plas-tigage width [A] to determine the clearance between each journal and camshaft cap. Measure the widest portion of the plastigage. Plastigage Scale [B]

• If any clearance exceeds the service limit, measure the camshaft journal diameter and the camshaft bearing in­side diameter.

• If any of the measurements is beyond the service limit, replace the worn part and check the clearance again.

Camshaft Journal, Camshaft Cap Clearance
Standard: 0.030 ~ 0.071 mm (0.0012 ~ 0.0028 in.)

Service Limit: 0.16 mm (0.006 in.)

Camshaft Chain Guide Wear

• Visually inspect the rubber [A] on the guides.

• If the rubber is damaged or cut, replace the guides.