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.

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HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 287 (COOLING SYSTEM - 2.0L)CYLINDER BLOCK - CORE PLUG REPLACEMENT

2010 Mazda 5 Sport, 2.3 L, Standard

Cylinder Block - Core Plug Replacement

2010 Mazda 5 Sport, 2.3 L, StandardSECTION Cylinder Block - Core Plug Replacement

WARNING: This page is about a different car, the 2003 Mazda Tribute, 2002 Mazda Tribute, and 2001 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Inspecting Cylinder Block Plug Bore For Any Damage Would Interfere With Correct Sealing Of Plug

Courtesy of MAZDA MOTORS CORP.

Use a slide hammer or tools suitable to remove the cylinder block core plug.
Inspect the cylinder block plug bore for any damage that would interfere with the correct sealing of the plug. If the cylinder block plug bore is damaged, bore for the next oversize plug.
NOTE:
- Oversize plugs are identified by the OS stamped in the flat located on the cup side of the plug.
Coat the cylinder block core plug and bore lightly with Threadlock 262 and install the cylinder block core plug.
Cup-Type

Fig 2: Coating Cylinder Block Core Plug And Bore Lightly With Threadlock And Install Cylinder Block Core Plug
Courtesy of MAZDA MOTORS CORP.

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.