Subaru Legacy BN/BS (2015-2019) Service Manual: Assembly

Subaru Legacy BN/BS (2015-2019) Service Manual / Mechanical(h4do) / Cylinder head / Assembly

(1)	Exhaust valve	(6)	Valve spring seat	(11)	Valve collet
(2)	Intake valve	(7)	Intake valve oil seal	(12)	Valve shim
(3)	Cylinder head	(8)	Exhaust valve oil seal	(13)	Roller rocker arm pivot
(4)	Intake valve guide	(9)	Valve spring	(14)	Roller rocker arm
(5)	Exhaust valve guide	(10)	Valve spring retainer

1. Using the ST, install the valve oil seals to valve guides of cylinder head RH.

CAUTION:

• During work, place a waste cloth, etc. to avoid scratching the mating surface of the cylinder head RH.

• Use special care not to damage the cylinder head RH and guide during work.

• When installing the valve oil seal, press the ST with hands to install it and never drive the ST with a plastic hammer, otherwise the valve oil seal can be damaged.

NOTE:

• Use a new valve oil seal.

• Apply engine oil to valve oil seal before installing.

• The intake valve oil seals and exhaust valve oil seals are distinguished by their colors.

Identification colors:

Intake [Gray]

Exhaust [Green]

• For installation of valve guide, refer to INSPECTION. Cylinder Head > INSPECTION

ST 18261AA010

VALVE OIL SEAL GUIDE

2. For cylinder head LH, install the valve oil seal in the same manner.

3. Install the valve spring seat, valve spring, valve spring retainer, valve and valve collet to the cylinder head RH.

CAUTION:

During work, place a waste cloth, etc. to avoid scratching the mating surface of the cylinder head RH.

(1) Set the valve spring seat, valve spring and valve spring retainer onto the cylinder head RH.

NOTE:

Be sure to install the valve spring with its close-coiled end facing the cylinder head side.

(2) Coat the valve stem of each valve with engine oil and insert the valve into valve guide.

NOTE:

When inserting the valve into valve guide, use special care not to damage the oil seal lip.

(3) Compress the valve spring and install the valve collet using ST.

ST 0920287002000

REMOVER AND REPLACER

4. Install the valve spring seat, valve spring, valve spring retainer, valve and valve collet to the cylinder head LH.

5. Lightly tap the valve spring retainer with a plastic hammer, and make sure that the valve collet is securely attached.

6. Install the stud bolts onto cylinder heads.

Tightening torque:

T1: 6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

T2: 18 N·m (1.8 kgf-m, 13.3 ft-lb)

7. Install the chain cover securing bolt to the cylinder head LH.

Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

Removal

1. CYLINDER HEAD RH1. Remove the engine from the vehicle. Engine Assembly > REMOVAL2. Remove the intake manifold assembly. Intake Manifold Assembly > REMOVAL3. Remove the engine wiring harness. Eng ...

Installation

1. CYLINDER HEAD RH1. Clean the bolt holes in the cylinder block RH.CAUTION:To avoid erroneous tightening of the bolts, clean out the bolt holes sufficiently by blowing with compressed air to eliminat ...

Other materials:

Installation
CAUTION:If lubricant is spilt over the exhaust pipe, wipe it off with cloth to avoid emission of smoke or causing a fire.1. Before installing front oxygen (A/F) sensor, apply anti-seize compound only to the threaded portion of front oxygen (A/F) sensor to make the next removal easier.CAUTION:Never a ...