Mitsubishi 4G6 Series 1991 Specifications download pdf (Page 99)

4G6 ENGINE (E-W) -

Piston and Connecting Rod

11A-11-7

CONNECTING ROD CAP NUT INSTALLATION

Caution

If the cylinder head has been installed before installing

the connecting rod cap nut, be sure to remove the

spark plugs.

(1) Since the connecting rod cap bolts and nuts are torqued

using the plastic area tightening method, the bolts should

be examined BEFORE reuse. If the bolt threads are

“necked down”, the bolt should be replaced.

Necking can be checked by running a nut with fingers

to the full length of the bolt threads. If the nut does not

run down smoothly, the bolt should be replaced.

(2) Before installation of each nut, apply engine oil to the

thread portion and bearing surface of the nut.

(3) Install each nut to the bolt and tighten it with fingers.

Then tighten the nuts alternately to install the cap properly.

(4) Tighten the nuts to a torque of 20 Nm.

(5) Make a paint mark on the head of each nut.

(6) Make a paint mark on the bolt end at the position 90

to 100

from the paint mark made on the nut in the direction

of tightening the nut.

(7) Give a 90

to 100

turn to the nut and make sure that

the paint mark on the nut and that on the bolt are in

alignment.

Caution

If the nut is turned less than 90

, proper fastening

performance may not be expected. When

tightening the nut, therefore, be careful to give

a sufficient turn to it.

If the nut is overtightened (exceeding 100

), loosen

the nut completely and then retighten it by

repeating the tightening procedure from step (1).

INSPECTION

PISTON RING

(1) Check the piston ring for damage, excessive wear, and

breakage and replace if defects are evident. If the piston

has been replaced with a new one, the piston rings must

also be replaced with new ones.

(2) Check for the clearance between the piston ring and

ring groove. If the limit is exceeded, replace the ring or

piston, or both.

Standard value: 0.02 - 0.06 mm

Limit: 0.1 mm

PWEE9616

Dec. 1996Mitsubishi Motors Corporation

6AE0298

- 100

Paint mark

Paint

mark

Nut

Bolt

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Mitsubishi 4G6 Series 1991 Specifications Page 99

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