
1 minute read
Start with the compression gauge at zero. Then crank the engine through four compression strokes (four puffs).
GM SPO Group Numbers
Application GM SPO Group Number
Accelerator Control Cable Bracket 3.454 Belt Idler Pulley (Grooved) 1.062 Belt Idler Pulley (Smooth) 1.062 Camshaft Bearing 0.539 Camshaft Retainer 0.529 Camshaft Sprocket 0.736 Camshaft Sprocket Locator Pin 0.738 Camshaft Timing Chain 0.724 Clutch Pilot Bearing 0.649 Connecting Rod 0.603 Connecting Rod Bearing Kit 0.616 Crankshaft Balancer 0.659 Crankshaft Bearing Kit 0.096 Crankshaft Front Oil Seal 0.213 Crankshaft Oil Deflector 1.430 Crankshaft Rear Oil Seal 0.137 Crankshaft Rear Oil Seal Housing 0.137 Crankshaft Rear Oil Seal Housing Retainer Stud 0.137 Crankshaft Rear Oil Seal Housing Gasket 0.137 Crankshaft Rear Oil Seal Retainer Stud 0.137 Crankshaft Position Sensor 2.383 Crankshaft Position Sensor Reluctor Ring 2.383 Crankshaft Position Sensor Seal (O-ring) 2.383 Crankshaft Pulley 0.659 Crankshaft Sprocket 0.728 Cylinder Head 0.269 Cylinder Head Gasket 0.289 Distributor 2.361 Distributor Cap 2.367 Distributor Clamp 2.363 Distributor Gasket 2.363 Dowel Pin (Cylinder Head Locator) 8.939 Dowel Straight Pin (Transmission Locator) 8.939 Drive Belt Tensioner 1.060 EGR Valve 3.670 EGR Valve Gasket 3.680 EGR Valve Pipe 3.675 EGR Valve Pipe Fitting 3.680 Evaporative Emission Canister Purge Solenoid Valve 3.130 Evaporative Emission Canister Purge Solenoid Valve Harness 3.145 Engine Block N.S. Engine Block Core Hole Plug 0.034 Engine Block Oil Gallery Plug 1.531 Engine Camshaft 0.519 Engine Coolant Heater 1.152 Engine Coolant Temperature Sensor 1.150 Engine Coolant Temperature Gauge Sensor 1.150 Engine Coolant Thermostat 1.246 Engine Coolant Thermostat Seal (O-ring) 1.252 Engine Crankshaft 0.646 Engine Flywheel 0.666 Engine Front Cover 0.206 Engine Mount 0.029