Nissan Micra K11 silhouetteK11

CYLINDER HEAD — Inspection (Cont'd) — Valve Lifter / Assembly / Installation

EM-35prose procedure
Continued from EM-34

Inspection (Cont'd)

VALVE LIFTER

Valve lifter inspection

  1. 1
    Check contact and sliding surfaces for wear or scratches.
    Valve lifter (bucket / shim-on-top tappet) viewed in elevation with arrows indicating the contact surfaces to inspect: the top face (cam contact) and the side (bore sliding face).
    SEM160D
  2. 2
    Check diameter of valve lifter and valve lifter guide bore. Valve lifter diameter: 29.960 - 29.975 mm (1.1795 - 1.1801 in). Lifter guide bore diameter: 30.000 - 30.021 mm (1.1811 - 1.1819 in).
    Hand using a micrometer to measure the outer diameter of a valve lifter held against the work surface.
    SEM161D

Assembly

Cylinder head assembly

  1. 1
    Install valve component parts.
    Always use new valve oil seal. Refer to OIL SEAL REPLACEMENT.
    Before installing valve oil seal, install valve spring seat.
    Install uneven pitch type spring with narrow pitch end toward cylinder head.
    After installing valve component parts, use plastic hammer to lightly tap valve stem tip to assure a proper fit.
    Valve spring orientation diagram showing wide pitch coils at the top and narrow pitch coils at the bottom. Arrow points down with label "Cylinder head side" indicating the narrow-pitch end is installed toward the cylinder head.
    SEM638B

Installation

Valve lifter diameterStandard
29.960 - 29.975 (1.1795 - 1.1801)mm (in)
Lifter guide bore diameterStandard
30.000 - 30.021 (1.1811 - 1.1819)mm (in)
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See also

TIMING CHAIN — Installation · OIL SEAL REPLACEMENT

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