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.

2003 Infiniti I35FACTORY OEM SERVICE PROCEDURE

Control Valve Upper Body: Assembly: Notes

Lay control valve body down when installing valves. Do not stand the control valve body upright.

Fig 1: Identifying Control Valve Precautions
Courtesy of NISSAN MOTOR CO., U.S.A.
1. Lubricate the control valve body and all valves with ATF. Install control valves by sliding them carefully into their bores.
  
  Fig 2: Installing Control Valves Into Their Bores
  Courtesy of NISSAN MOTOR CO., U.S.A.
Be careful not to scratch or damage valve body.
Wrap a small screwdriver with vinyl tape and use it to insert the valves into their proper positions.

Fig 3: Inserting Valves Into Their Proper Positions
Courtesy of NISSAN MOTOR CO., U.S.A.

Factory Service Tools

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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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