911 Carrera 4S Coupe AWD F6-3600cc 3.6L SOHC (1997)
Valve Spring: Testing and Inspection
Installed length, dimension "A"
1. Assemble shims, valve spring support, valve, auxiliary spring, e.g. for oil thermostat (engine 928), part number 928.107.171.01, valve spring cap
and valve keepers.
NOTE: If required, the spring may be shortened slightly to facilitate assembly.
2. Using a depth gauge, measure vertically from valve spring cap top surface to valve spring seat surface. Record measurement.
3. Determine thickness of valve spring cap. Record measurement.
4. Determine actual dimension
Example for determining the actual dimension:
Inlet valve spring
Measured value: 38,5
Thickness of valve spring cap: - 1.6 = 36.9
Result:
The value of 36.9 is within the admissible tolerance.
NOTE: Take care not to confuse the parts after the measurement.