Date: Fri, 7 Mar 2003 12:40:06 -0800
Reply-To: Mike Pedersen <mikeped@SHAW.CA>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Mike Pedersen <mikeped@SHAW.CA>
Subject: Re: Why Must I Use a Bar Type Torque Wrench On Cylinder Head
Bolts?
Content-type: text/plain; charset=iso-8859-1
This is a case where my transferable skills come in to help (well , not
really...) again. If you dropped it or if someone else dropped it, it's
probably not in cal. I've tested new Snap-On "click style" torque wrenches
that were out of calibration. Bar type or dial type are preferred when you
(or another person) can actually read them. Click type are handy when
you're working in a tough spot.
How do I know all this stuff? Used to be a submarine mechanic. Spent three
years teaching submarine wrenching and one of the classes was metrology.
One of the devices (Trident) subs carry on board is a torque wrench
calibrator. They year calibrated quarterly IIRC.
Funny thing is, if you absolutely couldn't use a torque wrench, the QA
manual allowed you to tighten by muscle memory... didn't use that allowance
much though.
Anyhow, I don't even own a torque wrench. I'll rent one.
Mike
----- Original Message -----
From: "SyncroWesty" <syncrowesty@attbi.com>
To: <vanagon@gerry.vanagon.com>
Sent: Friday, March 07, 2003 11:59 AM
Subject: Re: Why Must I Use a Bar Type Torque Wrench On Cylinder Head Bolts?
> So I just bought (3 months ago) an upgraded Craftsman Click Style Torque
> Wrench that has a dial that indicates exact torque specs in both ft/lbs
and
> newton/meters. Down to .5 ft/lbs.
>
> So is new the same as calibrated?
>
> Thanks for the reply,
>
> Cory
> ----- Original Message -----
> From: "Jim Arnott" <jrasite@eoni.com>
> To: "SyncroWesty" <SyncroWesty@ATTBI.COM>; <vanagon@GERRY.VANAGON.COM>
> Sent: Friday, March 07, 2003 12:55 PM
> Subject: Re: Why Must I Use a Bar Type Torque Wrench On Cylinder Head
Bolts?
>
>
> > SyncroWesty wrote:
> > > Why must I use a Bar Type Torque Wrench on the Cylinder Head Bolts?
> While I
> > > have 3 click type torque wrenches I do not own a bar type.
> > >
> > > Is the Bently manual wrong on this? As it is about removing the
> crankshaft
> > > pulley, and Fuel Injectors?
> > >
> > > Would setting a Click Type Wrence to 1 ft/lb over spec work?
> > >
> > > I don't want to go buy a bar type wrench.
> > >
> > > Thanks,
> > >
> > > Cory
> > >
> > > .
> > >
> >
> > Clickers are notoriously inaccurate. IF your clicker has been calibrated
> > in the last year, it *should* be fine. If not, you need a beam type to
> > calibrate it with!
> >
> > As always, YMMV (and it this case, varying could mean leaky heads or
> > broken studs.)
> >
> > Jim
> >
> > --
> > If there is light in the soul, there will be beauty in the person.
> > If there is beauty in the person, there will be harmony in the house.
> > If there is harmony in the house, there will be order in the nation.
> > If there is order in the nation, there will be peace in the world.
> > ~ Chinese Proverb ~
> >
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