1992 MAZDA PROTEGE Workshop Manual

ASSEMBLY Bl
19 LO11 002
Body
:Part of
49 LO12 OAO)
49 8012 006
Pivot, valve
spring lifter
49 8012 OA2
Pivot, valve
spring lifter
49 8012 013
Foot
(Part of
49 B012 OA2)
49 SE01 310
Centering tool,
clutch disc For
installation of
valve seals
(B6 SOHC)
For
removal and
installation of
valves
(BP SOHC)
For
removal I
installation of
valves
For
removal I
installation of
valves
For
installation of
clutch disc 49 0636 1OOA
Arm, valve spring
lifter
49 s120 222
0
Pivot, valve
spring lifter
%
49 8012 012
Body
(Part of
49 8012 OA2)
49 B012 014
Locknut
(Part of
49 8012 OA2)
1. Clean all parts before reinstallation.
2. Apply new engine oil to all sliding and rotating parts.
3. Replace plain bearings if they are peeling, burned, or otherwise damaged.
4. Tighten all bolts and nuts to the specified torques.
Caution
l Do not reuse gaskets or oil seals.
I
3 For
removal and
installation of
valves
For
removal and
installation of
valves
(B6 SOHC)
For
removal I
installation of
valves
For
removal I
installation of
valves
23UOBl-0,
05UOBX-174
Bl-67

Bl ASSEMBLY
CYLINDER BLOCK (INTERNAL PARTS)
Torque SPecifications
12-18 N.m PROTRLklON 19mm (0.75 in)
YLINDER
(1.2-1.8 m-kg, 104-158 in-lb)
JOURNALS
AND CRANKPINS
(5.5-8.0, 40-43) WALLS
66 SOHC
47-52 (4.8-5.3, 35-38)
BP SOHC
49-51 (5.0-5.2, 36-38)
N.m (m-kg, ft-lb)
05UOBX-171
Connecting Rod
1. Assemble the SST as shown.
9MUOW143

ASSEMBLY Bl
I-
r
I 03UOBl-12
A NO.1
M
9MUOB2-14 I ‘NDENTIFICATION MARK
03UOBl-02
I
23UOBl-04
05UOBX.179
2. Set the stopper bolt (49 LO1 1 005) so that the depth L is
as specified.
Depth L
B6 SOHC
BP SOHC mm (in)
I 56.9-57.1 (2.240-2.248)
58.9-59.1 (2.319-2.327)
3. Tighten the locknut.
4. Insert the
SST No.2 into the piston pin as shown and fully
screw in the
SST No.1.
5. Apply engine oil to the piston pin.
6. Set the piston on the
SST with the F mark facing upward.
7. Assemble the piston and the connecting rod in the direc-
tion from which they were disassembled.
8. Press the piston pin into the piston and connecting rod un-
til the SST contacts the stopper bolt.
9. While inserting the piston pin, check the pressure force. If
it is less than specified, replace the piston pin or the con-
necting rod.
Pressure force:
4,905-14,715 N (500-l ,500 kg, 1 ,lOO-3,300 lb)
10. Check the oscillation torque of the connecting rod.
(Refer to page Bl-51.)
Piston Ring 1,
Install the three-piece oil rings on the pistons.
(1) Apply clean engine oil to the oil ring spacer and rails.
(2) Install the oil ring spacer with the ends upward.
Note
l The upper rail and lower rail are the same.
l The rails may be installed with either face upward. (3) Install the upper rail and lower rail
Bl-69

Bl ASSEMBLY
SPACER TANG
OIL RING
SPACER ENDS
PISTON
I
05u0Bx-180
R I
OWOBX-18.
81-70
2. Verify that both rails are expanded by the spacer tangs as
shown in the figure by making certain the rails turn smoothly
in both directions.
Caution
l The rings must be installed with the R marks
upward.
l The second ring must be installed with the scraper
face downward.
3. Apply clean engine oil to the top and second piston rings.
4. Install the second ring to the piston; then install the top ring.
Use a piston ring expander (commercially available).
5. Position the end gaps of the rings as shown in the figure.
05UOBX-182 Oil Filter Joint
1. Install the oil filter joint so that it protrudes as specified
03UOBl-21:
Protrusion: 19mm (0.75 in)
Oil Jet (BP SOHC)
1. Install the oil jets.
Tightening torque:
12-18 N*m (1.2-1.8 m-kg, 104-158 in-lb)

ASSEMBLY
f
05UOW18
THRUST BEARING
OYJOBX-18
05UOBX-18
23UOBl-04
OWOBX-181
Crankshaft
1. Before installing the crankshaft, inspect the main bearing
oil clearances as follows.
Oil clearance inspection
(1) Remove all foreign material and oil from the journals and
bearings.
Caution
l Install the grooved upper main bearings in the cyl-
inder block.
l Install the thrust bearings with the oil groove fac-
ing the crankshaft.
(2) Install the upper main bearings and thrust bearings.
(3) Set the crankshaft in the cylinder block.
Caution
l Do not rotate the crankshaft when measurlng the
oil clearances.
(4) Position Plastigage atop the journals in the axial di-
rection.
(5) Install the lower main bearings and the main bearing
caps according to the cap number and + mark.
(6) Tighten the main bearing cap bolts in two or three steps
in the order shown in the figure.
Tightening torque:
54-59 N-m (5.5-6.0 m-kg, 40-43 ft-lb)
(7) Remove the main bearing caps, and measure the P lasti-
gage at each journal at the widest point for the smallest
clearance and at the narrowest point for the largest
clearance.
(8) If the oil clearance exceeds specification, grind the
crankshaft and use undersize main bearings.
(Refer to page Bl-64.)
Oil clearance: 0.016-0.036mm (0.0007-0.0014 in)
Maximum: O.lOmm (0.004 in)
2. Apply a liberal amount of clean engine oil to the main bear-
ings, thrust bearings and main journals.
3. Install the crankshaft and the main bearing caps accord-
ing to the cap number and + mark.
61-71

Bl ASSEMBLY
05UOBX-18s
WIDTH
05lJOBX-l!
, MATCHING MARKS’,
03UOBl-1;
4. Tighten the main bearing cap bolts in two or three steps
in the order shown in the figure.
Tightening torque:
54-59 N.m (5.5-6.0 m-kg, 40-43 ft-lb)
5. Measure the crankshaft end play.
End play : 0.060-0.262mm (0.0031-0.0111 in)
Maximum: 0.30mm (0.012 in)
6. If the end play exceeds the maximum, grind the crankshaft
and install an oversize thrust bearing or replace the crank-
shaft and thrust bearing.
Thrust bearing width
Standard:
2.500-2.550mm (0.0964-0.1004 in)
0.25mm (0.010 in) oversize:
2.625-2.675mm (0.1033-0.1053 in)
0.50mm (0.020 in) oversize:
2.750-2.600mm (0.1063-0.1102 in)
0.75mm (0.030 in) oversize:
2.675-2.925mm (0.1132-0.1152 in)
Piston and Connecting Rod Assembly
Caution
l Protect the connecting rod bolts with rubber sleeves
to prevent damage to the crankpin journals.
OSUOBX-192
Connecting Rod Cap
1. Measure the connecting rod bearing oil clearances using
the same procedure as for the main bearing oil clearance.
Caution
l Align the matching marks on the cap and the con-
necting rod when installing the connecting rod cap.
Tightening torque:
47-52 N-m (4.6-5.3 m-kg, 35-36 ft-lb)
. . . . . . . . . . . . . . . . . . .
B6 SOHC
49-51 N.m (5.0-5.2 m-kg, 36-36 ft-lb)
. . . . . . . . . . . . . . . . . . . BP SOHC .-’
Bi-72

ASSEMBLY Bl
23UOEl-04
03UOBl-1:
MATCHING MARKS
‘\, 1
0311081.132
Oil clearance: 0.028-0.068mm (0.001 l-0.0027 in)
Maximum: O.lOmm (0.004 in)
2. If the oil clearance exceeds the maximum, grind the crank-
shaft and use undersize bearings. (Refer to page Bl-64.)
3. Measure the connecting rod side clearances.
Side clearance: 0.11 O-0.262mm (0.0043-0.0103 in)
Maximum: 0.30mm (0.012 in)
4. If the clearance exceeds the maximum, replace the con-
necting rod and cap.
5. Apply a liberal amount of clean engine oil to the crankpin
journals and connecting rod bearings.
6. Install the connecting rod caps with the matching marks
aligned.
7. Tighten the connecting rod cap nuts in two or three steps.
Tightening torque:
47-52 N-m (4.8-5.3 m-kg, 35-38 ft-lb)
. . . . . . . . . . . . . . . . . . . 66 SOHC
49-51 N*m (5.0-5.2 m-kg, 36-38 ft-lb)
. . . . . . . . . . . . . . . . . . . BP SOHC
Bl-73

Bl ASSEMBLY
CYLINDER BLOCK (EXTERNAL PARTS)
Torque Specifications
19-25
(1.9-2.6, 14-19)
GASKET, NEW
OIL SEAL,
NEW
7.6-11 N.m
(60-l 10 cm-kg,
69-95 in-lb)
GASKET, NE
16-21 (1.6-2.1, 12--15)-j
R
A -22% / 7.6-11 N.m
(60-110 cm-kg, 69-95 in-lb) 6-103 w
,..6-10.6,
71-76) 16-26
(1.6-2.7, 13-20)
7.6-11 N-m
(60-110 cm-kg, 69-95 in-lb)
N.m (m-kg, R-lb)
Bl-74
OWOBX-201 0
Rear Cover
1. Apply a small amount of clean engine oil to the lip of a new
oil seal.
2. Push the oil seal slightly in by hand.
Caution
l The oil seal must be pressed in until it is flush with
the edge of the rear cover.
3. Press the oil seal in evenly with a suitable pipe.
Oil seal outer diameter: 1OOmm (3.94 in)
4. Apply silicone sealant to the shaded area shown in the
figure.