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HOMESERVICE MANUALSMAZDA1990626 LX, 4D HATCHBACK, 2.2 1, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - SPECIFICATIONSMECHANICAL CHECKSENGINE COMPRESSION
1990 Mazda 626 LX, 4D Hatchback, 2.2 1, Automatic

Engine Compression

1990 Mazda 626 LX, 4D Hatchback, 2.2 1, AutomaticSECTION Engine Compression
COMPRESSION RATIO SPECIFICATIONS

Application Ratio
B2200 (2.2L) 8.6:1
B2600i (2.6L) 8.4:1
Miata (1.6L) 9.4:1
MPV
2.6L (4-Cyl.) 8.4:1
3.0L (V6) 8.5:1
MX-6 & 626 (2.2L)
Non-Turbo 8.6:1
Turbo 7.8:1
Protege (1.8L)
DOHC 9.0:1
SOHC 8.9:1
RX7 (1.3L Rotary)
Non-Turbo 9.7:1
Turbo 9.0:1
323 (1.6L) 9.3:1
929 (3.0L V6)
DOHC 8.9:1
SOHC 8.5:1
COMPRESSION PRESSURE SPECIFICATIONS

Application Minimum psi (kg/cm2 ) @ RPM Standard psi (kg/cm2 ) @ RPM
B2200 (2.2L) 121 (8.5) @ 300 173 (12.2) @ 300
B2600i (2.6L) 142 (10.0) @ 280 185 (13.0) @ 280
Miata (1) (1.6L) 135 (9.5) @ 300 192 (13.5) @ 300
MPV
2.6L (4-Cyl.) 142 (10.0) @ 280 185 (13.0) @ 280
3.0L (V6) 121 (8.5) @ 300 164 (11.5) @ 300
MX-6 (2.2L)
Non-Turbo 114 (8.0) @ 270 162 (11.4) @ 270
Turbo 98 (6.9) @ 260 139 (9.8) @ 260
Protege (1.8L)
SOHC (1) 121 (8.5) @ 300 173 (12.2) @ 300
DOHC (1) 128 (9.0) @ 300 182 (12.8) @ 300
RX7 (1.3L) (2) 43 (3.0) @ 250 85 (6.0) @ 250
323 (1.6L) (1) 135 (9.5) @ 300 192 (13.5) @ 300
626 (2.2L)
Non-Turbo 114 (8.0) @ 270 162 (11.4) @ 270
Turbo 98 (6.9) @ 260 139 (9.8) @ 260
929 (3.0L V6)
SOHC 114 (8.0) @ 300 164 (11.5) @ 300
DOHC 125 (8.8) @ 300 179 (12.6) @ 300
(1) Difference between cylinders should not exceed 28 psi (2.0 kg/cm2 ).
(2) Difference between chambers should not exceed 21 psi (1.5 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.