Main Bearing Cap Assembly Note; Piston Ring Assembly Note; Piston Assembly Note - Mazda 2006-2008 RX7 Engine Workshop Manual

Main Bearing Cap Assembly Note

1. Install the main bearing caps in the order
indicated in the figure.
2. Tighten the main bearing cap bolts using the SST
(49 D032 316).
Tightening torque
Plastic region tightening bolt (Bolt stem
length 110 mm)
(1) 44—46 N·m {4.5—4.6 kgf·m, 32.5—33.9
ft·lbf}
(2) 175°—185°
Elastic region tightening bolt (Bolt stem
length 104 mm)
(1) Apply engine oil to all bolts.
(2) 3—7 N·m {30.6—71.3 kgf·cm, 26.6—61.9 in·lbf}
(3) 23—27 N·m {2.4—2.7 kgf·m, 17—19.9 ft·lbt}
(4) 38—42 N·m {3.9—4.2 kgf·m, 28.1—30.9 ft·lbt}
(5) Loosen all the bolts. (no remaining torque.)
(6) 3—7 N·m {30.6—71.3 kgf·cm, 26.6—61.9 in·lbt}
(7) 18—22 N·m {1.9—2.2 kgf·m, 13.3—16.2 ft·lbt}
(8) 87.5°—92.5°

Piston Ring Assembly Note

1. Install the two oil control ring segments and spacer.
2. Verify that the second ring is installed with scraper face side downward.
3. Verify that the top ring is installed with scraper
face side inner of upper.

Piston Assembly Note

1. Position the end gap of each ring as indicated in
the figure.
01–10–28
MECHANICAL
TOP RING
UPPER OIL
RING RAIL
OIL RING SPACER
AND SECOND RING
9
5
1
3 7
10 2
4 8
6
LF
30° 30°
LOWER OIL
RING RAIL
B3E0110E105
L3
C3U0110E056
B3E0110E107