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Home >> Mazda >> 2001 >> 626 ES, 2.0 C >> Repair and Diagnosis >> Engine Performance >> Specifications >> Engine Controls - Service & Adjustment Specifications >> Mechanical Checks >> Engine Compression
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Engine Compression

Warm engine to normal operating temperature. Remove all spark plugs. Disconnect ignition coil primary wire connector. Hold throttle plate fully open. Crank engine and note compression pressure.

COMPRESSION SPECIFICATIONS

Application Minimum psi (kg/cm 2 ) @ RPM Standard psi (kg/cm 2 ) @ RPM
B2300 & B2500 (1) (1)
B3000 & B4000 (1) (1)
Miata 146 (10.3) @ 300 198 (13.9) @ 300
Millenia (2)
2.3L 120 (8.5) @ 250 164 (11.5) @ 250
2.5L 130 (9.3) @ 300 189 (13.3) @ 300
MPV (1) (1)
Protege (2)
1.6L 142 (10.0) @ 300 199 (14.0) @ 300
2.0L 119 (8.4) @ 300 171 (12.0) @ 300
Tribute
2.0L (1) (1)
3.0L (1) (1)
626 (2)
2.0L 119 (8.4) @ 300 171 (12.0) @ 300
2.5L 141 (9.9) @ 250 202 (14.2) @ 250
(1) Lowest compression reading should not be less than 75 percent of highest compression reading.
(2) Difference between cylinders should not be more than 28 psi (2.0 kg/cm2 ).
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