Tappet Inspection (3.0L); Cylinder Block Inspection (3.0L) - Mazda B-Series 1997 Workshop Manual

INSPECTION / REPAIR
TAPPET
1. Clean all tappet parts in clean so1ven.t and wipe them with
a
clean, lint-free cloth.
2.
Inspect tappet for signs of pitting, scoring or excessive
wear. Replace the entire assembly if tlie plunger is not free
in the body. The plunger should drop to the bottom of the
body by its own weight when assembled dry.
3. The tappets can also be checked witt-I a hydraulic tester to
test the leakdown rate. Follow the instructions of the test
unit manufacturer.
4. Measure the tappet diameter.
Diameter: 22.206mm (0.874 in)
5. If the tappet diameter is not within specifications, replace
the tappet.
6. Measure the tappet oil clearance by measuring the tappet
bore diameter and subtracting the tappet diameter from
the bore diameter.
Tappet oil clearance:
Standard: 0.01 8-0.069mm (0.0007-0.0027 in)
Limit: 0.127mm (0.005 in)
7.
Measure the collapsed tappet gap.
Collapsed tappet gap (nominal):
2.23-4.77mm (0.088-4.1 89 in)
4BUOB2-108
CYLINDER BLOCK
1
.
Check the cylinder block for the following and repair as
necessary:
(1) Leakage damage
(2) Cracks
(3) Scoring of wall
2. Using a straightedge, measure the cylinder block decks
for distortion in six directions.
Distortion: 0.08mm (0.003 in) per 152.0mm (6.0 in)
3.
If distortion exceeds the maximum, replace the cylinder
block.
4. Measure the cylinder bore diameter in X and Y directions
at three levels (A,B,C), as shown.
Cylinder bore diameter
rnm {in)
Cylinder bore diameter P'iston color code
1
89.009-89.035 i3.5043-3.5053)
1
Red
I