Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2007 Mazda 3 L4-2.3LFACTORY OEM SERVICE PROCEDURE
Compression Check
Compression [LF]
Standard 1,400 kPa (14.28 kgf/cm2, 203.1 psi) [300 rpm]
Minimum 980 kPa (10.0 kgf/cm2, 142.2 psi) [300 rpm]
Maximum difference between cylinders 196.1 kPa (2.0 kgf/cm2, 28.5 psi)
Compression [L3]
Standard 1,372 kPa (14.00 kgf/cm2, 199.1 psi) [290 rpm]
Minimum 960 kPa (9.79 kgf/cm2, 139.2 psi) [290 rpm]
Maximum difference between cylinders 196.1 kPa (2.0 kgf/cm2, 28.5 psi)
Standard 1,400 kPa (14.28 kgf/cm2, 203.1 psi) [300 rpm]
Minimum 980 kPa (10.0 kgf/cm2, 142.2 psi) [300 rpm]
Maximum difference between cylinders 196.1 kPa (2.0 kgf/cm2, 28.5 psi)
Compression [L3]
Standard 1,372 kPa (14.00 kgf/cm2, 199.1 psi) [290 rpm]
Minimum 960 kPa (9.79 kgf/cm2, 139.2 psi) [290 rpm]
Maximum difference between cylinders 196.1 kPa (2.0 kgf/cm2, 28.5 psi)
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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