Service manual

G420F(FE) Service Manual Chapter 3. Engine Mechanical System
107
11) Selection
CRANKSHAFT
INDENTIFICATI
ON MARK
CONNECTING
ROD
IDENTIFICATI
ON MARK
ASSEMBLING
CLASSIFICATI
ON OF
BEARING
a (WHITE) D(YELLOW)
b (NONE) C (GREEN)
I(YELLOW)
c (YELLOW) B(NONE)
a (WHITE) C (GREEN)
b (NONE) B (NONE)
II(NONE)
c (YELLOW) A (BLACK)
a (WHITE) B (NONE)
b (NONE) A (BLACK)
III(WHITE)
c (YELLOW) AA (BLUE)
3. Check the crankshaft bearing oil clearance.
1) To check main bearing-to-journal oil clearance,
remove the main caps and bearing halves.
2) Clean each main journal and bearing half with a
clean shop tower.
3) Place one strip of plastic gage across each
main journal.
4) Reinstall the bearings and caps, then torque
the bolts.
Tightening torque : 30Nm (300kgf.cm, 22lbf.ft) +
60˚ ~ 65˚
NOTE: Do not turn the crankshaft.
5) Remove the cap and bearing again, and
measure the widest part of the plastigage.
Standard oil clearance : 0.028 ~ 0.046 mm
(0.0011 ~ 0.0018in.)
6) If the plastigage measures too wide or too
narrow, remove the upper half of the bearing,
install a new, complete bearing with the same
color mark (select the color as shown in the
next column), and recheck the clearance.
CAUTION
Do not file, shim, or scrape the bearings or the
caps to adjust clearance.
7) If the plastigage shows the clearance is still
incorrect, try the next larger or smaller bearing
(the color listed above or below that one), and
check clearance again.
NOTE: If the proper clearance cannot be obtained
by using the appropriate larger or smaller bearings,
replace the crankshaft and start over.
CAUTION
If the marks are indecipherable because of an
accumulation of dirt and dust, do not scrub them
with a wire brush or scraper. Clean them only
with solvent or detergent.