Valve system B204/B235
Valve system B204/B235 |
1. |
1. Exhaust valve B204 |
2. |
|
3. |
2. Inlet valve B204 |
4. |
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Important | ||
The exhaust valves are stellite-coated and should therefore not be machined. Grinding with paste only is advised. Valves in the B235R (Viggen) are coated with a material that withstands high temperatures. |
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Valve guides |
Length
|
mm
|
42.5
|
Outside diameter
|
mm
|
12.039 - 12.050
|
Bore for valve guides, diameter
|
mm
|
12.000 - 12.018
|
Maximum clearance, valve guide
|
mm
|
0.50 (Measured across the valve disc with the valve drawn out 3 mm from the valve seat.)
|
Valve springs |
Length
|
B204
|
B235
|
|
Fitted
|
mm
|
37.0
|
37.5
|
Free
|
mm
|
44.0 - 47.0
|
57.1 - 60.1
|
When loaded 620 - 670 N
(138 - 150 lbf) |
mm
|
28.4
|
|
When loaded 361 -403 N
(81 - 91 lbf). Twin coil springs incl. valve disc and valve stem seal. |
mm
|
|
31.7
|
Tappets B204/B235 |
Diameter
|
mm
|
32.959 - 32.975
|
Height
|
mm
|
24.0
|
Bore for tappets, diameter
|
mm
|
33.000 - 33.016
|