Cylinder Head - Inspection (Cont'd)

EM-119prose procedure

Valve spring out-of-square and pressure specs differ between SR20DE and SR20DET (inner/outer springs). Hydraulic lash adjuster applies to SR20DE only.

Continued from EM-118

Inspection (Cont'd)

VALVE SPRING

Squareness

Valve Spring Squareness

1
Measure "S" dimension. Out-of-square:
SEM288A
2
If it exceeds the limit, replace spring.

Out-of-square (Unit: mm (in))

SR20DE	SR20DET Inner	SR20DET Outer
Less than 2.2 (0.087)	Less than 1.8 (0.071)	Less than 2.1 (0.083)

Less than 2.2 (0.087)

SR20DET InnerLess than 1.8 (0.071)

SR20DET OuterLess than 2.1 (0.083)

Pressure

Check valve spring pressure.

Pressure: N (kg, lb) at height mm (in)

Item	SR20DE	SR20DET Inner	SR20DET Outer
Standard	569.00 - 641.57 (58.02 - 65.42, 127.93 - 144.25) at 30.0 (1.181)	154.95 - 174.76 (15.8 - 17.82, 34.84 - 39.29) at 20.6 (0.811)	451.51 - 504.18 (46.04 - 51.41, 101.52 - 113.36) at 27.9 (1.098)
Limit	More than 549.2 (56.0, 123.5) at 30.0 (1.181)	More than 147.1 (15.0, 33.1) at 20.6 (0.811)	More than 428.6 (43.7, 96.4) at 27.9 (1.098)

Standard

SR20DE569.00 - 641.57 (58.02 - 65.42, 127.93 - 144.25) at 30.0 (1.181)

SR20DET Inner154.95 - 174.76 (15.8 - 17.82, 34.84 - 39.29) at 20.6 (0.811)

SR20DET Outer451.51 - 504.18 (46.04 - 51.41, 101.52 - 113.36) at 27.9 (1.098)

Limit

SR20DEMore than 549.2 (56.0, 123.5) at 30.0 (1.181)

SR20DET InnerMore than 147.1 (15.0, 33.1) at 20.6 (0.811)

SR20DET OuterMore than 428.6 (43.7, 96.4) at 27.9 (1.098)

If it exceeds the limit, replace spring.

Hydraulic Lash Adjuster (SR20DE)

1
Check contact and sliding surfaces for wear or scratches.
SEM935C
2
Check diameter of lash adjuster. Outer diameter: 16.980 - 16.993 mm (0.6685 - 0.6690 in)
SEM936C

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