There is some variety of opinion about this retorqueing business.
my $.02: I believe the engine should be allowed to cool to near room
temperature before retorque. Loosen nuts one at a time
only
enough to overcome the initial friction. Retourque to
within
20 lbs of finishing torque. when all nuts are at this
point,
finish the march to finishing torque in rounds of 5 lbs.
Don't use aluminum paint as a sealant. I like Gaskacinch
and KW Coppercoat as sealants on those gaskets requiring
sealant. Multiple coats of these work pretty well on
those
pesky manifold gaskets that have all the little divots.
I don't know how to seperate my science from my voodoo,
so i won't try. Good Luck!
riverside
----- Original Message -----
From: "Paul Hunt" <paul.hunt1@blueyonder.co.uk>
To: "Ed Woods" <fogbro1@comcast.net>; <mgs@autox.team.net>
Sent: Friday, July 30, 2010 2:48 AM
Subject: Re: [Mgs] retorque
> What have you torqued it to initially? The only instruction I have come
> across is to retorque to the initial figures, where it is done at all.
> V8s have aluminium heads and there are no special instructions for that
> compared to the 4-cylinder. What you *should* do though is back the nut
> off just enough to get it moving before retorquing, as it needs more
> torque to get it started from stiction of the threads than it is applying
> to the gasket. *Don't* back the nuts right off to finger tight before
> retorquing, there is no point and as most head removal instructions say to
> undo them gradually in rotation to prevent warping it sounds positively
> dangerous to me.
>
> PaulH.
>
> ----- Original Message -----
>> Question about a new aluminum head on a '72 MGB: after the initial
>> installation and start up, when should the head be retorqued and to what
>> value?
> _______________________________________________
>
> Mgs@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.75
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe:
> http://autox.team.net/mailman/options/mgs/riverside@southslope.net
_______________________________________________
Mgs@autox.team.net
Donate: http://www.team.net/donate.html
Suggested annual donation $12.75
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
|