Cylinder Block Inspection - Mazda B-Series 1997 Workshop Manual

B1
INSPECTION / REPAIR
7. Measure the camshaft journal-to-bearing clearance by
measuring the journal diameter and the bore diameter.
Subtract the journal diameter from the bore diameter to
determine the clearance.
Clearance: 0.025-0.076mm (0.0014.003 in)
Maximum: 0.15mm (0.006 in)
8. Measure the camshaft end play.
Caution
Prying against the camshaft pulley with the valve
train load on the camshaft can break or damage the
pulley. Therefore, the rocker arm adjusting nuts
must be backed off, or the rocker and shaft assem-
bly must be loosened sufficiently to free the cam-
shaft. After checking the camshaft end play, adjust
the valve clearance.
(1) Push the camshaft toward the rear of engine. Install a
dial indicator so the indicator point is on the camshaft
gear.
(2) Zero the dial indicator. Pull camshaft forward and
release it. Compare reading with specifications. If end
play is excessive, replace the thrust plate.
(3) Remove dial indicator.
End play: 0.025-0.177mm (0.001--0.007 in}
End play: 0.229mm (0.009 in) Max
CYLINDER BLOCK
1. Check the cylinder block for the following. Repair as
necessary.
(1 ) Leakage damage
(2)
Cracks
(3) Scoring of wall
2. Using a straightedge, measure the cylinder block deck for
distortion in six directions.
Distortion:
0.07mm (0.003 in) per 152.4mm (6.0 in}
Overall distortion:
0.152mm (0.006 in)
3.
If distortion exceeds the maximum, replace the cylinder
block.