Engine Compression Specifications

1990 Toyota 4Runner 2D Utility, 3.0 V, AutomaticSECTION Engine Compression Specifications
COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio 9.0:1
Normal Compression Pressure
Camry 178 psi (12.5 kg/cm2 )
Pickup & 4Runner 171 psi (12.0 kg/cm2 )
Min. Compression Pressure 142 psi (10.0 kg/cm2 )
Maximum Variation Between Cylinders 14 psi (1.0 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.