Engine - Replacement Availability & ECM Calibration Kit
Bulletin Number: 92-6-66Reference Number: 276114
Publish Date: 12/92
Subject:
SERVICE OF 1987-92 2.3L GM GOODWRENCH ENGINES W/1992 OR 93 MODEL GOODWRENCH ENGINES (RPO LGO/LD2)
Models Affected:
1987-92 GRAND AM AND GRAND PRIX MODELS
ENGINE APPLICATION:
2.3L (RPOs LGO and LD2) Year 2.3L (Automatic and Manual)
ENGINE VIN:
A and D
SERVICE INFORMATION:
1992 model year 2.3L (VIN A and D) GM Goodwrench engines will replace the 1987-1992 model year 2.3L (VIN A and D) Service Replacement Engine Assemblies as service inventory is exhausted. When the 1992 model service inventory is exhausted, 1993 model assemblies will be used.
2.3L Quad 4 partial engines are no longer available. Use the GM Goodwrench engine to service engines previously serviced with a partial engine.
When replacing a 1987-89 model 2.3L (VIN D) engine with a 1992 or 1993 GM Goodwrench engine, an ECM Calibration Kit is also required. This kit contains a new EPROM (mem-cal), a crankcase vent hose connector, instruction sheet, ECM EPROM (mem-cal) access door label and two (2) 10 mm exhaust retaining nuts required to adapt the 1992 or 1993 model engine into the 1987-1989 model applications.
IMPORTANT:
For 1987-1989 model 2.3L engines, it may be necessary to drill out the two (2) lower holes in the original exhaust manifold with an 11 mm (7/16 in.) drill bit to allow the retaining studs to fit through.
IMPORTANT:
For early model 1992 2.3L engines, original engine mount bracket bolts and holes have M-10 bolt size. Later model 1992, all 1993, and GM.
Goodwrench engines will have M-12 bolts. When servicing an early 1992 model 2.3L engine having M-10 bolts, drill out engine mount bracket with a 12.5 mm (1/2 in.) drill bit. Two of the bolts are supplied on the GM Goodwrench engine; THE THIRD BOLT (GM P/N 22579611) MUST BE SPECIFICALLY ORDERED or order the engine installation kit (GM P/N 12353644) which includes the bolt (refer to applicable parts catalog). The M-12 bolt fastener specification is 60 N-m (44 lb.ft.) plus rotate 90 degrees for automatic transmission or 110 N-m (81 lbs.ft.) plus rotate 90 degrees for manual transmission.
For any future EPROM (mem-cal) replacement, be sure the replacement EPROM (mem-cal) is the correct application for the Goodwrench Engine Assembly.
PARTS INFORMATION:
An ECM Calibration Kit is required for 1992 (p/n 24570252) or 1993 (p/n 24573866) model GM Goodwrench engines when used in 87-1989 model applications. ECM Calibration Kits are not required for 1989 model 2.3L (VIN A) or any 1990-93 model applications.
Parts are currently available through GMSPO.
The following summarizes the most significant changes among the various model year (VIN D) engines. Components are generally NOT interchangeable between model years.
1. Cylinder Head Design
- 1987-1989 - Similar for these model years only.
- 1990-1993 - Similar for these model years only.
2. Crankshaft Reluctor Index
- 1987-1988 - 0 degrees advance.
- 1989-1993 - 15 degrees advance.
3. Knock Sensor (Electronic Spark Control - ESC) System Calibration
- Specific calibration for each model year (involving emissions, knock, and spark calibration).
4. Electronic Ignition Engine (IDI) Module Assembly
- 1987-1988 - Model year and engine wiring specific.
- 1989-1993 - Model year and engine wiring specific.
5. Intake Manifold
- 1987-1989 - Similar for these model years only.
- 1990-1993 - Similar for these model years only.
WARRANTY INFORMATION:
Labor Time Operation Number: J1840 - Engine, Universal - Replace
J6364 - EPROM (Calibrator, PROM) - Replace
Labor Time Allowance: Use applicable Labor Time Guide