Gælder for: Engine 457.9 in model 382.15, 634.0 Engine 457.9 in model 693, 695, 696, 934.241/251, 958 Engine 457.9 in model 695 Engine 460.9 in model 934.241/251, 938.142
Basic bore diameter (B) in cylinder head for the intake valve seat insert
standard
mm
47,300...47,325
repair stage I
mm
47,500...47,525
repair stage II
mm
47.700...47,725
Valve seat checking values
Number
Designation
Engine 457.9, 460.984
BE05.30-B-1004-03D
Basic bore diameter (B) in cylinder head for the exhaust valve seat insert
standard
mm
43,000...43,025
repair stage I
mm
43,200...43,225
repair stage II
mm
43,400...43,425
Valve seat checking values
Number
Designation
Engine 457.9, 460.984
BE05.30-B-1005-03D
Valve seat insert interference fit
intake
mm
0,065...0,110
exhaust
mm
0,055...0,090
Valve seat checking values
Number
Designation
Engine 457.9, 460.984
BE05.30-B-1009-03D
Depth (C) of bore in cylinder head for the housing of intake valve seat insert
standard
mm
10,9...11,1
repair stage I
mm
11,1...11,3
repair stage II
mm
11,3...11,5
Valve seat checking values
Number
Designation
Engine 457.9, 460.984
BE05.30-B-1010-03D
Depth (C) of bore in cylinder head for the housing of exhaust valve seat insert
standard
mm
10,9...11,1
repair stage I
mm
11,1...11,3
repair stage II
mm
11,3...11,5
001 589 53 21 00
Dial gage
1
Rework the valve seat housing of inlet and/or exhaust, in several stages, determining the measurement G for the cutting tool, until reaching the desired finish diameter (B). If necessary, adjust the depth (C) of the housing. Measure G calculation: G = (B + F) : 2 Example: Diameter B = 35mm (housing) Diameter F = 10 mm (Guide) Measure G = (35 + 10) : 2 = 22,5
When machining the housing, use the valve guide as the centering reference to ensure the housing concentricity relative to the valve guide.
B05.30-0002-02
2
Check the diameter (B) of the inlet and/or exhaust valve seat housing with the bore meter and the dial indicator. Check the depth (C) of the housing.
Unconditionally ensure the interference between the seat and the housing, keeping the housing diameter (B) within the tolerances for each repair level.
