Mazda 121 Workshop Manual page 102

ASSEMBLY
THFUSI METAL
(2) lnstall the upper main beanngs and thrust bearings
i3t Set the crankshatt in the cyl'nder block
Caution
lio
not totate rtte crankshaft when measuting lhe
oil clealances.
(4) Position Plastigage atop the journals in the axal
directton.
(5) Install the lower main beanngs and the main bearing
'-'
iaos according to tne cap number and € mark
(6) Tnh€n the main bearing cap bolls In tlvo or thre€ steps
-
in'the order shown in the figure.
t'?l':!'Jt*.ii'irT-".0
m-ks, 40-43 n'rb)
17) Remove the main bearing caps. aFd measure lhe PlaslF
' '
oaoe at each purnal at the wldest poini for the smallest
ileirance and al lhe narrowest point for lhe largest
clearance.
fgr lt lhe oil clearance exceeds specilicalion grind lhe
' '
crankshaft and use undersze main bearings
(Refer to Page B-58.)
Oil clearance: 0.018-O,O36mm (0'0007--'{''0014 in)
Maximum: O.lomm (0.004 in)
2. Apply a |beral amount ol clean engine oil to the main bea'
inqs,'thrusr bearings ano main lournals
s. inidr thi crarkst'Jtl and the marn bean'rg caps accord-
ing to the cap number and e mark.
4. Tiohten the main bearing cap bolts in two or three steps
in the order shown in the figure
Tiqhteninq torque:
!r-sg
-Hm
15.s-o'o m-rg, 40-43 ft'lb)
B-64