1992 MAZDA PROTEGE engine

ASSEMBLY
2311082-04
05UOBX-17
OSUOBX-17
SPACER TANG
OIL RING
SPACER ENDS
-I
a
5. Tap the piston pin in with the SST until the pin contacts the
clip.
If the pin cannot be installed easily, replace the connecting
rod.
6. Install the second clip into the clip groove in the piston.
7. Check the oscillation torque of the connecting rod. If the
large end does not drop by its own weight, replace the pis-
ton and/or piston pin.
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.
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 Fl 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).
132-69

ASSEMBLY B2
r
03UOB2-09
__~~
05UOBX-188
.
OWOBX-19(
WIDTH
I
05UOBX-19
(7) Remove the main bearing caps, and measure the Plasti-
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 B2-64.)
Oil clearance: 0.018-0.036mm (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 C= mark.
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 : 0.080-0.282mm (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 bearlng width
Standard:
2.500-2.550mm (0.0984-0.1004 in)
0.25mm (0.010 in) oversize:
2.625-2.675mm (0.1033-0.1053 in)
0.50mm (0.020 in) oversize:
2.750-2.800mm (0.1083-0.1102 in)
0.75mm (0.030 in) oversize:
2.875-2.925mm (0.1132-0.1152 In)
B2-71

B2 ASSEMBLY
RUBBER SLEEVE
I
OYJOBX-192
03UOB2-17
03UOB2-09 2 '0
05UOBX-196 Piston and Connecting Rod Assembly
Caution
l Protect the connecting rod bolts with rubber sleeves
to prevent damage to the crankpin journals.
1. Apply a liberal amount of clean engine oil to the cylinder
walls, pistons, and piston rings.
2. Check the piston rings for correct end gap alignment.
3. Insert each piston assembly into the cylinder block with the
F mark facing the front of the engine. Use a piston ring com-
pressor (commercially available).
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-
netting rod when installing the connecting rod cap.
Tightening torque:
47-50 N-m (4.8-5.1 m-kg, 35-37 &lb)
Oil clearance: 0.028.0.088mm (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 82-64.)
3. Measure the connecting rod side clearances.
Side clearance: 0.1 lo-0.282mm (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.

ASSEMBLY B2
MATCHING MARKS
CYLINDER BLOCK (EXTERNAL PARTS)
Toraue SPecifications 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:
47-50 N*m (4.8-5.1 m-kg, 35-37 ft-lb)
19-25 (1.9-2.6, 14-19)

157-l 67
(16-17, 116-1’23)

OIL SEAL.’
/ GASKET. NEW
[SO--110 cm-ka. 69-95 in-lb) 16-26 (1.6-2.7,
13-20
16-21
(1.6-2.1, 12-16)
GASKET, NEW
SEAT FACE
SEAT FACE
N-m (m-kg, ft-lb)
05UOBX-19
B2-7:

B2 ASSEMBLY
x9 05UOBX-20
OWOBX-203
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.
5. Install the rear cover.
Tightening torque:
7.8-l 1 N*m (80-l 10 cm-kg, 69-95 in-lb)
Oil Pump
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 oil pump body.
3. Press the oil seal in evenly with a suitable pipe.
Oil seal outer diameter: 44mm (1.73 in)
4. Install the oil pump and a new gasket.
Tightening torque:
19-25 N#m (1.9-2.6 m-kg, 14-19 ft-lb)

ASSEMBLY
05UOBX-221
I 0311082-10
Cylinder Head
1. Install the cylinder head.
2. Apply clean engine oil to the bolt threads and seat faces.
3. Tighten the cylinder head bolts in two or three steps in the
order shown.
Tightening torque:
76-61 Nsrn (7.7-8.3 m-kg, 56-60 ft-lb)
Water Thermoswitch, Heat Gauge Unit
1. Install the water thermoswitch.
Tightening torque:
5.9-8.8 N#m (60-90 cm-kg, 52-78 in-lb)
2. Install the heat gauge unit.
Tightening torque:
6.4-9.3 N.m (65-95 cm-kg, 56-82 in-lb)
Thermostat, Thermostat Cover
1. Remove all foreign material from the thermostat cover
mounting surface.
2. Install the thermostat with the jiggle pin facing upward.
Caution
l The printed side of the gasket must face the ther-
mostat.
3. Install a new gasket and the thermostat cover.
Tightening torque:
19-26 N-m (1.9-2.6 m-kg, 14-19 ft-lb)
HLA
1. Apply clean engine oil to the friction surfaces.
2. If the HLA are being reused, install them in the position from
which they were removed.
3. Verify that the HLA move smoothly in their bores.
05UOBX.223
B2-81

B2 ASSEMBLY
DlSTRlBUfOR
DRIVE GROOVE
-- 03umx-01
-
05UOBX-05
--____--
udOBX-056
---I
Camshaft
Note
l The exhaust camshaft is grooved for the distribu-
tor drive.
1. Apply clean engine oil to the camshaft journals and bearings.
2. Install the camshaft in position.
Caution
l Do not allow any sealant on the camshaft journal
surfaces.
3. Apply silicone sealant to the shaded areas shown in the
figure.
4. Install the camshaft caps according to the cap number and
arrow mark.
5. Install the camshaft cap bolts and tighten them in two or
three steps in the order shown in the figure.
Tightening torque:
11.3-14.2 Nlm (1.15-l .45 m-kg, loo-126 in-lb)
6. Apply a small amount of clean engine oil to the lip of a new
camshaft oil seal.
7. Push the oil seal slightly in by hand.
Caution
l The oil seal must be tapped in until it is flush with
the edge of the camshaft cap.
8. Tap the oil seal in evenly with a suitable pipe and a hammer.
Oil seal outer diameter: 48mm (1.89 in)
Seal Plate
1. Install the seal plate on the cylinder head.
Tightening torque:
7.8-l 1 N-m (80-l 10 cm-kg, 69-95 in-lb)
~,. ,
03”oEm10:
B2-82

ASSEMBLY B2
AUXILIARY PARTS
Toraue Specifications
19-25 19-25
O-RING, NEW
(1.9-2.6, 14-19) (1.9-2.6, 14-19)
-
I 19-25
mfi GASKET. NEW (1.9-2.6, 14-19)
37-52
(33-5.3, 27-38)
(3.8-5.3, 27-38)
7.8-11 N.m /
(80-110 cm-kg, 69-95 in-lb)
N.m (m-kg, A-lb)
.-. 05UOBX-23
Engine Hanger
1. Install the front and rear engine hangers.
OYJOBX-238
Tightening torque:
37-52 N*m (3.8-5.3 m-kg, 27-38 ft-lb)
82-87