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  4. MOV and MAC
  5. F131-3R Instruction Book 1937
  6. Cylinder Head Joint

Unless this shows signs of blowing it will not require attention. If, however, there are signs of leakage examine the faces of the joint washer and if necessary fit a new one. Very carefully clean the surfaces and refit the cylinder head. Tighten the cylinder head nuts a little at a time so that the head is pulled down perfectly evenly. Be careful not to strain the nuts when tightening, as if considerable force is used it will be found that it may still be possible to go on turning the nuts but excessive pressure of this nature is quite unnecessary to hold the head securely and to make a satisfactory joint and may cause serious distortion.

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  • Velocette Documents
    • GTP Manuals
      • F40/5R GTP Instruction Book 1951
    • KSS, KTS Manuals
      • F236/4R Mk. II OHC Instruction Book 1950
      • F42/3R OHC Models 1925-1931 Instruction Book
    • MAC Manuals
      • F469/4R MAC Service Guide 1965
      • F466/2R MAC Owner's Handbook 1955
      • F50/7R MAC Rigid Frame Service Manual 1955
      • F50/4R Supplement
    • MOV and MAC
      • F131-3R Instruction Book 1937
    • MSS Manuals
      • F477 Owners Handbook 1954
    • Venom, Viper, MSS
      • F485/1R Owner's Handbook 1956
      • F484/9R Service Guide 1967
      • F484/11R Service Guide 1971
    • Valiant Manuals
      • F62-1R Service Manual