CAMPAIGN: 6.2L DIESEL ENGINE OIL FILTER CAP REPLACE

MODELS: 1983-1984 G-Vans and P Model Light Duty Trucks Equipped With A 6.2L Diesel Engine (RPO LH6/LL4)

TO: ALL AFFECTED DEALERS:

The following information revises the "Service Procedure" and "Warranty Information" sections of Campaign bulletin 5R04 issued December, 1984.

SERVICE PROCEDURE

Install a new oil filler cap, PIN 25060118, on each involved vehicle (see Figure No. 1). Discard former oil filler cap. On certain "P" Models, it will not be possible to install the new oil filler cap. To correct this condition it will be necessary to reposition the oil filler tube to provide adequate clearance as follows.

1. Disconnect negative battery cables.

P-MODEL VANS OR FORWARD CONTROL CHASSIS ONLY:

2. Remove nuts retaining the oil filler tube lower hold-down bracket (see Figure No. 2). Remove and discard upper bracket if equipped. Rainstall nut on crossover manifold, if upper bracket was removed, and torgue to 18-27 Nm (13-20 Ft. Lbs.).

3. Install spacers (5/16" flat washers) as required on the lower hold-down bracket attaching studs (see Figure No. 3). Approximately one inch of clearance is needed at the oil filler cap.

4. Rainstall oil filler tube (with new oil filler cap) and hold-down bracket.

Additional clearance, if needed, can be gained by firmly pulling on the filler tube. This will slightly distort the hold-down bracket. Care should be used when doing this, so that the filler tube is not damaged nor the oil seal grommet.

P-MODEL MOTOR HOMES ONLY;

5. Remove oil fill tube clamps (Figure No.4).

6. Separate oil fill tube from hose.

7. Shorten oil tube about 1-1/2 inches. Remove burrs and any metal shavings from tube.

8. Reattach tube to hose.

9. Reposition tube (with new oil filler cap installed) to provide adequate clearance.

10. Reinstall tube using rear clamp only, installed in the same location on the oil fill tube support bracket. Discard from clamp.

ALL P-MODELS

11. Reconnect negative battery cable.

PARTS AND LABOUR CLAIM INFORMATION

Repair Code Operation Time Allowance ----------- ---------- --------------- 2A Replace oil filler cap .3

3A Valve Van or Forward Control .4 Chassis Models

4A Motor home models only. .6 Replace oil filler cap. Reposition oil filler tube to provide adequate clearance.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.