>From: Joe Curry <spitlist@gte.net>
>
>Grant Buss wrote:
> >
> > I started the Spitfire today after replacing a head gasket. I am going
> > to re-torque the head. Should that be done when the engine is still hot
> > or do I do it after it cools down?
>
>
>Yes, the proper technique is to bring the engine up to operating
>temperature and immediately pull the valve cover and rocker assembly and
>retorque
>while it is still hot and expanded. The head bolts should require a bit of
>tightening to bring them within the torque specification. After that,
>wait for the engine to cool and then reinstall the rocker assembly and
>reset the valves.
>
>Joe
>
I'm not necessarily disagreeing, but am genuinely curious. IIRC, this
is not a factory procedure, but has become generally accepted dogma.
However to my way of thinking, if Triumph wanted 46 ft/lbs hot, they
would have specified that. If you torque to 46 ft/lbs cold and then
re-torque to 46 ft/lbs hot, then you are getting 50 or 55 or whatever
ft/lbs cold, and are in fact slightly overtorquing the head. At least
that's the way I see it.
Why would we not follow Triumph's recomendation?
Greg Rowe
_________________________________________________________________
/// spitfires@autox.team.net mailing list
/// To unsubscribe send a plain text message to majordomo@autox.team.net
/// with nothing in it but
///
/// unsubscribe spitfires
///
|