General Motors — Engine Set-Up and Testing
Operation
From a General Motors service manual — check it applies to your exact model before use.
Before you start
- Do not place sealant pellets into a non-pressurized coolant recovery reservoir; add to the radiator instead.
Procedure
- Fill the crankcase with the proper quantity and grade of oil; add Engine Oil Supplement if a new camshaft or lifters was installed.
- Fill the coolant system; add 2 coolant sealant pellets (crush prior to installation).
- With the ignition OFF or disconnected, crank the engine several times and listen for unusual noises.
- Start the engine and listen for unusual noises.
- Run the engine at about 1000 rpm until at operating temperature.
- Listen for improperly adjusted valves or sticking lifters.
- Check for oil and coolant leaks while the engine is running.
- Adjust ignition timing using the proper service manual or Emission Control Label.
Specs & values
- Run engine speed at about 1000 rpm until operating temperature
Source: General Motors service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.