GM Service Manual Online
For 1990-2009 cars only
Table 1: Cylinder Compression Check Specifications
Table 2: Valve Clearance Specifications

Application

Specification

Metric

English

Engine Information

  • Engine Type

Overhead Cam L-3

  • Bore

68.5 mm

2.70 in

  • Compression Ratio

9.3:1

  • Maximum Power at 6,000 RPM

37.5 KW

50.3 HP

  • Maximum Torque at 4,600 RPM

68.6 N·m

50.59 lb ft

  • Lubricating Type

Forced Feed

  • Oil Filter Type

Full Flow

  • Oil Pan Capacity Including Oil Filter

2.7 liter

2.84 quarts

  • Oil Pump Type

Rotary (Trocboid)

  • Stroke

72.0 mm

2.83 in

  • Total Displacement

796 cm³

48.6 in³

  • Ignition Timing (ignition sequence)

5° BTDC (1-3-2)/10° BTDC (1-3-2)

  • Idle Speed (A/C On)

1,000 ± 50 RPM

  • Idle Speed (A/C Off)

950 RPM

Cylinder Compression Check Specifications

Condition

Cylinder Name

1

2

3

Compression top dead center of No. 1 cylinder

  • Intake

O

O

--

  • Exhaust

O

--

O

Exhaust top dead center of No. 1 cylinder

  • Intake

--

--

O

  • Exhaust

--

O

--

*O marks indicate the place where the valve clearance can be checked and adjusted.

Valve Clearance Specifications

Application

Specification

Metric

English

Cold

  • Intake

0.15 ± 0.02 mm

0.0059 ± 0.0008 in

  • Exhaust

0.32 ± 0.02 mm

0.0126 ± 0.0008 in

Hot

  • Intake

0.25 ± 0.02 mm

0.0098 ± 0.0008 in

  • Exhaust

0.42 ± 0.02 mm

0.0165 ± 0.0008 in

Engine Performance Curve


Object Number: 1225553  Size: LF