SPECIAL POLICY: CYLINDER BLOCK ADJUSTMENT

MODELS/YEARS: 1984 OMEGA AND CUTLASS CIERA MODELS EQUIPPED WITH A 2.5L 4-CYLINDER ENGINE (VIN CODE R)

This bulletin contains revised partial engine and 1 gasket kit part numbers and replaces DealerTechnical Bulletin 84-T-27A, which should be discarded.

CONDITION

Some 1984 Omega and Cutlass Ciera models equipped with a 2.5L L-4 engine (VIN Code R) may experience cracks in the cylinder block casting between the valve lifter cavity and the water jacket, resulting in a loss of engine coolant and subsequent engine failure.

VEHICLES INVOLVED

All 1984 Omega and Cutlass Ciera models equipped with a 2.5L L-4 engine (VIN Code R) from the start of production through the following VIN breakpoints:

Model Plant From To and Including ----- ----- ---- ---------------- Omega Willow Run (W) Start of Production EW342272 Cutlass Ciera Doraville (D) Start of Production ED455232 Framingham (G) Start of Production EG335744

SPECIAL POLICY ADJUSTMENT

Should the engine block crack due to the conditions identified in this Special Policy bulletin, General Motors will replace the partial engine, part number 10030773 and the following associated parts:

Camshaft Transmission insert pilot bushing Camgear Oil filter Crank gear Engine oil Lifters Engine coolant Gaskets

This Special Policy covers both parts and labor for a period of five (5) years or 100,000 miles, whichever occurs first, from the date the vehicle was originally placed in service.

This "Special Policy Adjustment Bulletin" and a copy of Dealer Management Bulletin 84-1-32 should be filed in the 3-ring binder furnished to the dealer by General Motors.

SERVICE PROCEDURE

1. Pressure test for evidence of coolant loss.

2. If pressure test shows no visible evidence of coolant loss, remove cover from valve lifter area and inspect casting above lifter cavity (see Figure 1).

3. With engine warm and pressure applied, coolant should be visible using a "black light".

4. If condition is evident, cylinder block and those associated parts identified in this bulletin must be replaced using applicable replacement procedures referenced in Section 6A of the 1984 Firenza, Omega, Cutlass Ciera and Cutlass Cruiser Service Manual. To prevent camshaft lobe and valve lifter scuffing, coat lifters and camshaft lobes with GM Engine Oil Supplement, part number 1052367 during assembly.

PARTS INFORMATION

Parts are to be obtained from the Warehousing and Distribution Division of General Motors (WDDGM).

These parts, when required should be ordered from WDDGM on a C.I.O. order with no special instruction code, but order on an advise code (2).

Part Number Quantity Description ----------- -------- ----------- *10081914 1 Partial engine

10029616 1 Camshaft

10005942 1 Cam gear

10028052 1 Crank gear

5234200 8 Lifters

10026805 1 Gasket kit

10037280 1 Gasket kit

10009785 1 Manual transmission insert pilot bushing 10018699 1 Automatic transmission insert pilot bushing 25010792 1 Oil filter

1052915 1 RTV

1052763 3 qts. Oil

1052367 1 (16 oz.) GM Engine Oil Supplement

1052753 6 qts. Engine coolant

*Part number 10081914 consists of: block, pistons and rod assemblies, crankshaft, crankshaft bearings, rod bearings and rear seals.

NOTE: The crankshaft may have a reluctor ring. This will not affect the operation of the engine and may be used in this application.

WARRANTY CLAIM INFORMATION

When performing repairs as described in the Service Procedure of this bulletin, submit warranty claim for credit as follows. Zone authorization will be required.

Failed Part No. Trouble Code Labor Operation Labor Hours -------- ------------ --------------- ----------- 10081914 92 T4087 See Below

Labor Hours Labor Hours ----------- ----------- Omega 8.5 Cutlass Ciera 8.9 ----- ------------- Add: With A/C .5 Add: With A/C .5 W/Cruise Control .2 W/Cruise Control .2 W/Auto Trans .4

REIMBURSEMENT

Claims for customer reimbursement of previously paid repairs are to be submitted using Labor Operation T4088 and Trouble Code 92. Total reimbursement amount requested should be shown in the sublet column. Do not list parts or labor. Zone authorization will be required.

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.