PRE-RELEASE
Valve system B204/B235
| Valve system B204/B235 |
| 1. |
Exhaust valve B204i/E
|
|
| 2. |
Exhaust valve B205R/L, B235R
|
|
| 3. |
Inlet valve B204i/E
|
|
| 4. |
Inlet valve B205R/L, B235R
|
|
| Important | ||
|
Exhaust valves are Stellite-coated and should therefore not be machined. Only grinding with paste is recommended. The valves in the B235R 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
|
B235R/B205L/R
|
|
|
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). Dual spring including valve disc and valve stem seal. (B235R, B205L/R only) |
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
|
