77

ENGINE OVERHAUL

Inspection (Cont'd)

PISTON RING GAP

CRANKSHAFT INSPECTION

0.8(0.031)

/

Ring gap mm (in)

Top ring

No. 1 grade    0.21    ■ 0.30 (0.0083    - 0.0118)

No. 2 and 3 grade 0.18    - 0.30 (0.0071    -0.0118)

2nd ring    0.15    - 0.34 (0.0059    - 0.0134)

Oil ring    0.20    ■ 0.69 (0.0079    - 0.0272)

Max. tolerance of

ring gap:

BEARING CLEARANCE

CAUTION:

•    Do not tum crankshaft or connecting rod while the plastigage is being inserted.

•    When bearing clearance exceeds the specified

limit,, make surę that a proper bearing has been installed. Then if excessive bearing clearance exists, use a thicker bearing or an undersized bearing so that the specified bearing clearance is obtained.    - o- >

1    v»    i’ .. ^

1.    Check crankshaft journals for score, bias, wear or cracks. If faults are minor, correct with fine crocus cloth.

2.    Check journals with a micrometer for taper anc out-of-round.

Out-of-round (X-Y)

0.01 mm (0.0004 in)

Taper (A-B):

Less than 0.02 mm (0.0008 in)

EM75

a. When regrinding crank pin journal, measur "L" dimension in fillet roli. Make surę that th measurements exceed the specified limit. If th measurements are within the specified limit, d not regrind it.

Bearing clearance Main bearing

0.03 - 0.05 mm (0.0012 - 0.0020 in) Limit 0.075 mm (0.0030 in) Connecting rod bearing

0.02 - 0.06 mm (0.0008 - 0.0024 in) . _ Limit 0.12 mm (0.0047 in)