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Checking valve guides > < Renewing valve stem oil seals

A3 Mk1

Valve dimensions
Valve dimensions
  Note
   
Inlet and exhaust valves must not be machined. Only grinding-in is permitted.
  A15-0326
DimensionInlet valveExhaust valve
Ø amm26.80 … 27.0029.80 … 30.00
Ø bmm5.95 … 5.975.94 … 5.95
cmm104.84 … 105.34103.64 … 104.14
α∠°4545

  WARNING
t  Care must be taken when disposing of old sodium-cooled exhaust valves.
t  The valves must be sawn in two with a metal saw between the centre of the stem and valve head. When doing so, the valves must not come into contact with water. After preparing the valves, throw a maximum of ten into a bucket of water. Then step away immediately, since a chemical reaction will occur in which the sodium filling burns.
t  After performing these steps the valves can be disposed of in the normal way.
   

Checking valve guides > < Renewing valve stem oil seals