Nissan Sunny Quiz
Diesel Engine

Cylinder Head / Valve Reconditioning

In this manual: Diesel Engine
Owner's Manual — 35Maintenance — 752.0 Liter Gasoline Engine — 36Diesel Engine — 32Cooling System — 11Heating and Ventilation System — 10Fuel and Exhaust System — 154Engine Starting System — 16Clutch — 7Manual transmission — 7Automatic transmission — 9Axle Shafts — 7Brakes — 22Suspension and Steering — 52Electrical System — 30
~1min read

GENERAL INFORMATION

Valve seats with signs of wear and burning may be reconditioned while maintaining the correct contact angles and seat width. Otherwise, the cylinder head must be replaced. Always recondition valve seats until the contact surface looks flawless. A valve seat can be replaced using standard workshop press equipment. A valve seat cutter is required for reconditioning. Because this tool requires special experience, this work must be performed at a workshop.

Checking the Valve Face Contact Surface

PROCEDURE

1. Контактная поверхность фаcки клапана (1) должна находиться посередине ширины

1. The contact surface of the valve face (1) must be centered on the valve face width and run evenly around the entire circumference.

2. If the valve head thickness (2) is less than the wear limit (limit value), replace the valve.

Cylinder Head Machining Dimensions If the distortion of the sealing surface exceeds the limit value of 0.1 mm, the sealing surface of the cylinder head must be machined.

New cylinder head height: 137.9–138.1 mm. Warning The cylinder head and cylinder block may be machined by a total maximum of 0.2 mm.

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