SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPLYMOUTH1990LASER RS, 2.0 R, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - SPECIFICATIONSMECHANICAL CHECKSENGINE COMPRESSION
1990 Plymouth Laser RS, 2.0 R, Standard

Engine Compression

1990 Plymouth Laser RS, 2.0 R, StandardSECTION Engine Compression
COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio
1.8L & 2.0 Non-Turbo 9.0:1
2.0L Turbo 7.8:1
2.2L Non-Turbo 9.5:1
2.2L Turbo 8.0:1
2.5L Non-Turbo 8.9:1
2.5L Turbo 7.8:1
3.0L (VIN 3) & 3.3L 8.9:1
3.0L (VIN U) N/A
Compression Pressure
1.8L (1) 131 psi (9.2 kg/cm2 )
2.0 (DOHC) (1) 137 psi (9.6 kg/cm2 )
2.0L (DOHC) Turbo (1) 114 psi (8.1 kg/cm2 )
2.2L, 2.5L & 3.3L (2) 100 psi (7.0 kg/cm2 )
3.0L (VIN 3) (2)(3) 178 psi (12.5 kg/cm2 )
3.0L (VIN U) 9.3:1
(1) Minimum compression pressure is given. Maximum difference between cylinders should not exceed 14 psi (.98 kg/cm2 ).
(2) Minimum compression pressure is given. Maximum difference between each cylinder should not exceed 25 percent.
(3) At 250 RPM.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.