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HOMESERVICE MANUALSCHEVROLET1999MONTE CARLO LS, 3.8 KREPAIR AND DIAGNOSISENGINE PERFORMANCESPECIFICATIONSENGINE CONTROL SYSTEM - SERVICE & ADJUSTMENT SPECIFICATIONSMECHANICAL CHECKSENGINE COMPRESSION
1999 Chevrolet Monte Carlo LS, 3.8 K

Engine Compression

1999 Chevrolet Monte Carlo LS, 3.8 KSECTION Engine Compression

Check engine compression with engine at normal operating temperature, all spark plugs removed and throttle wide open.

COMPRESSION SPECIFICATIONS

Application Specification
Normal Compression Pressure
1.0L 199 psi (14.0 kg/cm2 )
1.3L 192 psi (13.5 kg/cm2 )
1.8L 218 psi (15.3 kg/cm2 )
1.9L 185-205 psi (13.0-14.4 kg/cm2 )
2.2L, 2.4L, 3.0L, 3.1L, 3.4L, 3.8L, 4.0L, 4.6L & 5.7L (1)
3.5L (2)
Minimum Compression Pressure
1.0L & 1.3L 156 psi (11.0 kg/cm2 )
1.8L 145 psi (10.2 kg/cm2 )
1.9L 180 psi (12.7 kg/cm2 )
2.2L, 2.4L, 3.0L, 3.1L, 3.4L, 3.8L, 4.0L, 4.6L & 5.7L (1)
3.5L (2)
(1) Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 100 psi (7.0 kg/cm2 ).
(2) Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 140 psi (9.8 kg/cm2 ).
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.