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 MANUALSMAZDA20083 S TOURING, 4D HATCHBACK, 2.3 4, STANDARDREPAIR AND DIAGNOSISENGINE MECHANICALMECHANICALENGINE MECHANICAL - OVERHAUL - (LF, L3)VALVE GUIDE REPLACEMENTVALVE GUIDE INSTALLATION

2008 Mazda 3 s Touring, 4D Hatchback, 2.3 4, Standard

Valve Guide Installation

2008 Mazda 3 s Touring, 4D Hatchback, 2.3 4, StandardSECTION Valve Guide Installation

Assemble the SSTs so that depth L is as specified.
Depth L
1. 12.2-12.8 mm {0.481-0.503 in}
  
  Fig 1: Identifying Depth L
  Courtesy of MAZDA MOTORS CORP.
Tap the valve guide in from the side opposite the camshaft side until the SSTs contacts the cylinder head.

Fig 2: Installing Valve Guide
Courtesy of MAZDA MOTORS CORP.
Verify that the valve guide protrusion height (dimension A) is within the specification.
Standard Height
1. 12.2-12.8 mm {0.481-0.503 in}
  
  Fig 3: Measuring Valve Guide Protrusion Height
  Courtesy of MAZDA MOTORS CORP.

RENDER: 1.0x

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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.