Opel Frontera UBS. Manual - part 375
SERVICE INFORMATION 00 – 23
SERVICE STANDARD
Engine Mechanical
mm (in)
Parts
Items
Service standard
Cylinder
Head
Cylinder head deck, and
exhaust manifold mating
surface for flatness
Cylinder head height
Hot plug depression
Hot plug installation
pressure
0.05 (0.0020) or less
92.0 (3.6220)
—
44000-54000N (4500–5500
kg/9923–12128 lbs)
0.2 (0.0079)
—
0.02 (0.0008)
—
Service limit
Remarks
Cannot be
reground
Free height
Squareness
Spring tension
48.0 (1.8898)
—
294 (30/66.1)
Valve
Spring
47.10 (1.8543)
1.7 (0.0669)
257.9 (26.3/57.9)
At installed
height
38.9 (1.5)
N (lb)
Diameter of Valve stem
Valve and valve guide
clearance
Valve guide upper end
height (Measured from the
Cylinder head upper face)
Valve guide margin
Valve thickness
Valve seat contact
surface angle
Valve seat contact width
7.946–7.961
(0.3128–0.3134)
7.921–7.936
(0.3118–0.3124)
0.039–0.071
(0.0015–0.0028)
0.064–0.096
(0.0025–0.0038)
13.0 (0.5118)
1.1 (0.0433)
1.34 (0.0528)
1.38 (0.0543)
45
°
1.7 (0.0669)
2.0 (0.0787)
Valve
and
Valve
Guide
7.880 (0.3102)
7.850 (0.3091)
0.200 (0.0079)
0.250 (0.0098)
—
1.6 (0.0630)
1.1 (0.0433)
1.1 (0.0433)
—
2.2 (0.0866)
2.5 (0.0984)
IN
EX
IN
EX
IN
EX
IN
EX
Curvature
—
Push rod
0.3 (0.0118)