Engine - New Rod and Main Bearings Available

85isuzu01
SB85-01-001 April 12, 1985 ENGINE

AVAILABILITY OF UNDERSIZED ROD & MAIN BEARINGS

VEHICLES AFFECTED

I-Mark with G180Z, and Impulse, P'UP, and Trooper II with G200Z Engines.

SERVICE INFORMATION

This bulletin will detail the procedure for using new undersized crankshaft main and connecting rod bearings in G180Z and G200Z engines.

Workshop Manual changes must also be made with respect to crankshaft clearances as indicated in the attachments. Update all applicable manuals.

PARTS INFORMATION

The following crank and rod bearings are now available from your facing PDC.

ENGINE P/N PART NAME BRG LOC U/S

For All 8-94401 -715-0 Brg.; Crankshaft #2,4 0.02mm
G180Z & 8-94401 -716-0 Brg.; Crankshaft #2,4 0.03mm
G200Z 8-94401 -717-0 Brg.; Crankshaft #1,3,5 0.02mm
8-94401 -718-0 Brg.; Crankshaft #1,3,5 0.03mm
For All 8-944 1-705-0 Brg.; Conn. Rod N/A 0.01mm
G180Z 8-94401 -706-0 Brg.; Conn. Rod N/A 0.02mm

For
KB/KB82 8-94401 -707-0 Brg.; Conn. Rod N/A 0.01mm
JR Only 8-94401 -708-0 Brg.; Conn. Rod N/A 0.02mm
-G200ZFor
JR Only 8-94401 -708-0 Brg.; Conn. Rod N/A 0.01mm
-G200Z- 8-94401 -710-0 Brg.; Conn. Rod N/A 0.02mm
SERVICE PROCEDURE
Utilize the new undersized bearings as follows:

1. Measure the crank journals as outlined in the Workshop Manual.

2. Select proper bearings to achieve the oil clearances as shown.

Crankshaft Main . 021 - .079 mm

Conn.Rod Big End . 019 - .075 mm

(Select bearings to achieve an oil clearance closest to .050 mm.)

3. Rod bearings must be used as a pair (i.e. same size bearing at the top and bottom of a particular journal).

4. Crank bearings may be mixed to attain proper clearance (see the chart below).

CRANKSHAFT BEARING COMBINATION CHART

MAIN

Desired Clearance Reduction Cap Side Block Side

0.01mm U/S 0.02mm Std.
0.015mm U/S 0.03mm Std.
0.02mm U/S 0.02mm U/S 0.02mm
0.025mm U/S 0.03mm U/S 0.02mm
0.03mm U/S 0.03mm U/S 0.03mm

ROD

Desired Clearance Reduction Cap Side Rod Side

0.01mm U/S 0.01mm U/S 0.01mm
0.02mm U/S 0.02mm U/S 0.02mm