97up-list-digest Thursday, July 9 1998 Volume 01 : Number 144



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Ford Truck Enthusiasts - 1997 and Newer Trucks and Vans
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In this issue:

FTE 97up - 97 truck lug nut recall
FTE 97up - Ford "A" plan pricing
Re: FTE 97up - 97 truck lug nut recall
Re: FTE 97up - ranger oil light
FTE 97up - Replies to my Aux fuel tank questions
FTE 97up - oil level
Re: FTE 97up - Replies to my Aux fuel tank questions
FTE 97up - ADMIN: 250,000th visitor

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Date: Wed, 08 Jul 1998 19:11:22 -0400
From: "Paul J. Naas"
Subject: FTE 97up - 97 truck lug nut recall

I received a letter from Ford on 7-6-98 and they enclosed a sketch
showing lug nut tightening sequence (the standard cross tightening
method). They said to tighted the nuts to 100 ft/lbs and then an
additional 1/8 to 1/4 turn. As stated the dealerships will provide this
service for you if you desire. Personally, I don't like to over tighten
any lug nuts. It stretches and/or gauls the threads thus ruining the
wheel studs and perhaps warping the front rotors. I've been checking my
lug nuts (at 100 ft/lbs) on a 4-6 week basis and have always found them
tight. Also as stated in previous messages, Ford will send another
info letter when the nuts are available. They estimate the 3rd qaurter
of 1998 (June, July or August).
Keep em tight...

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Date: Wed, 08 Jul 1998 19:45:06 -0400
From: "Paul J. Naas"
Subject: FTE 97up - Ford "A" plan pricing

I purchased my 97 F-150 thru tha "A" plan and my savings was 16-17%
below MSRP

Paul Naas

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Date: Wed, 08 Jul 1998 16:48:44 -0700
From: WiNk
Subject: Re: FTE 97up - 97 truck lug nut recall

Having spent about three years on torque procedures I can confidently say
that I believe that Ford is way out in the outer limits when they specify a
1/8 to 1/4 inch increase in the nut travel to achieve a torque condition. I
am certain that my colleagues would have a heart attack on that score too.

When we had a critical torque sequence to do we required the personnel to
take the wrench assembly with , crow foots, wrench extenders, or whatever to
the calibration lab and pull the torque on a torque guage certified by the
National Bureau of Standards. The personnel were required to use the exact
setup that they were going to use on the equipment that they torqued. In
some cases we permitted the "turn of the nut method" which I believe is what
Ford is attempting to do.

The turn of the nut method brings the nut into contact with the surface to
be fastened. After touching the surface the nut would then be tightened
with a torque wrence to the specified torque while counting the turns on the
nut to reach the torque. The method is used where clear access to similar
nuts was not available.

On the other hand the turn of the nut method was a a better way to torque
inaccesible areas because the angle of pull on the torque wrench is as
important as the guage that indicates the torque value. Torque wrenches
need to be pulled with a perpendicular wrist angle to the wrench, otherwise
a vector force will be encountered. Does Ford obey the perpendicular wrist
pull requirement? I seriously doubt it. Does Ford use impact wrenches with
torque extender bar attachments coupled to the impact wrench? I am certain
that they do. Are the torque extender bars calibrated for torque? I
seriously doubt that they are. The final question, . . . . Are the wheel
> nuts safe given Ford's torque procedures? I can say I have serious
reservations about their torque data and proscribed method.

Torque needs to be in the "modulus of elasticity" relative to the material
used as a stud, so I don't really see how additional nut rotation can be an
accurate enough method to torque nuts.



Paul J. Naas wrote:

> I received a letter from Ford on 7-6-98 and they enclosed a sketch....

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