Service manual

181 CID (3.0L) 4 CYLINDER GM ENGINE

SERVICE MANUAL NUMBER 26

90-861329--1 MARCH 1999 Page 3A-49

Connecting Rod/Piston Assembly

Removal

1. With oil pan, oil pump and cylinder head removed, use a ridge reamer to remove any

ridge and/or deposits from upper end of cylinder bore.

IMPORTANT: Before ridge and/or deposits are removed, turn crankshaft until piston

is at bottom of stroke and place a cloth on top of piston to collect cuttings. After ridge

and/or deposits are removed, turn crankshaft until piston is at top of stroke, then

remove cloth and cuttings.

2. Inspect and mark connecting rods and bearing caps.

3. Remove connecting rod cap and install connecting rod bolt guide (3/8-24) on bolts. Push

connecting rod and piston assembly out of top of cylinder block.

NOTE: It will be necessary to turn crankshaft slightly to disconnect and remove some con-

necting rod and piston assemblies.

72892

a-Connecting Rod Bolt Guide (3/8-24) (J-5239)

Disassembly

1. Disassemble piston from connecting rod using piston pin remover as shown.

72365

a-Piston Pin Remover (J-24086-B)

b-Arched Base

c-Piston

d-Connecting Rod

e-Rod Support

2. Position connecting rod on tool rod support with rod support inserted between

connecting rod end and piston. Align piston pin with hole located in top of arched base.

3. Insert pin remover through hole (located in top of arched base) and into piston pin hole.

Press on pin remover to remove piston pin.

Index