I suspect that the difference is that modern cars seem to invariably use the
stretch bolt method.
Tightenning to a particular torque and then by a further accurately
specified number of degrees.
Earlier designs were straightforward torque settings. Or do em up tight and
then re-check after a bit. I guess head gasket material has changed to.
For many years, not having access to a torque wrench ( they were
expensive!) I used to cope perfectly well torquing everything by "feel" and
never had problems with standard 1950/1960's machinery
Guy
-----Original Message-----
From Guy R Day <grday at btinternet.com>
To: Frank Clarici <spritenut@exit109.com>
Cc: Spridgets <spridgets@Autox.Team.Net>
Date: 01 November 2004 09:52
Subject: RE: Retorquing Head
>(Damn good question Frank...) I haven't done it but have asked the dealers
>to on the first service of every new car I have owned. Whether they did or
>not I don't know. I would suggest not as it was not part of the listed
>service schedule of any of the new Vauxhall, Rover, Mazda or Audi vehicles
I
>have owned.
>However, there are differences between 'new' and 'old' machinery
>types/tolerances/machining and it may well be 1930/40's design service
>essentials do not sit well with 2004 production.
>
>Guy R Day
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