Sparkplug torque values

On Mon, 04 Jul 2005 12:06:06 +0200, Philippe
wrote:


Thanks for the information Philippe

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

Roger wrote:

I've spent the better part of an hour and a half on the net searching,
tried to get into the ABS site which appeared to be down, spend
several hours searching through what manuals I have, but I couldn't
find the torque required for the spark plugs in an IO-470N.

For all sparks

diameter
18mm
- in steel : 34-45N.m / 3.5-4.5kg.m / 25.3-32.5lb.ft
- in Al alloy: 35-40N.m / 3.5-4.0kg.m / 25.3-28.9lb.ft

14mm
- in steel : 25-35N.m / 2.5-3.5kg.m / 18.0-25.3lb.ft
- in Al alloy: 25-30N.m / 2.5-3.0kg.m / 18.0-21.6lb.ft

12mm
-in steel : 15-25N.m / 1.5-2.5kg.m / 10.8-18.0lb.ft
- in Al alloy: 15-20N.m / 1.5-2.0kg.m / 10.8-14.5lb.ft

10mm
- in steel : 10-15N.m / 1.0-1.5kg.m / 7.2-10.8lb.ft
- in Al alloy: 10-12N.m / 1.0-1.2kg.m / 7.2-8.7lb.ft

8mm
- in Al alloy: 8-12N.m / 0.8-1.0kg.m / 5.8-7.2lb.ft

On Mon, 4 Jul 2005 08:25:43 -0700, "RST Engineering"
wrote:

...tug ... tug ... right about ... THERE.

That's why there's such a big market for Helicoils:-))

BTW, that copper loaded goose grease is so far superior to the black
graphite stuff it isn't even funny. Just FYI

Amen!

Thanks Jim

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com


Jim




"Roger" wrote in message
.. .
I've spent the better part of an hour and a half on the net searching,
tried to get into the ABS site which appeared to be down, spend
several hours searching through what manuals I have, but I couldn't
find the torque required for the spark plugs in an IO-470N.

On Mon, 04 Jul 2005 18:19:32 -0500, jerry wass
wrote:



RST Engineering wrote:
...tug ... tug ... right about ... THERE.

BTW, that copper loaded goose grease is so far superior to the black
graphite stuff it isn't even funny. Just FYI


Jim I take a little artists brush & paint that coppercoat all over
the insulator too--makes'em easier to see if you drop them in the dirt.

Yah, but if you drop them all in the dirt you'd have to do a new W&B
sheet.

When I was working for a living (before going back to college and
becoming a computer guru) we used a high pressure grease that is meant
for handeling high loads as low speeds. It was affectionately
referred to as "Bear ****".

I'll swear the stuff was alive. I don't know how anything so thick
could move so fast. Get a spec of the stuff on you and by the time
you gave up trying to get it off, it seemed like it covered half your
body.

I believe it had Beryllium Dioxide in it, but it may have been
Graphite. What ever it was black! I have a whole carton of BR2-S
(Beryllium Dioxide grease) in grease gun cartridges. It's Gray and a
whole lot easier to get off, but it still gets on every thing you'll
touch for the next two days. :-))

I used to be able to get 10 Oz tubes of DC-4 and DC-5 compound for a
buck each. The high temperature, red, Silicon RTV (TM) was about the
same in large tubes as well. Unfortunately the tubes I had left seem
to be a bit *firm* when squeezed. (it's only about 10 years past
their shelf life)

Oh, yah... I pulled the plugs and every bottom plug had those little
beads of lead in them. The stuff was just laying loose, minding its
own business with the exception of one plug on the right mag which had
a lot of the stuff in it. (Right mag was the one that failed the run
up) None of the electrodes were shorted, but I'd imagine the
turbulence in there with the engine running would put that stuff right
where you wouldn't want it.

The plugs are nearly new and look good.
At any rate, with all the rain we had and heavy haze tonight, I didn't
get a chance to run it up, but I did clean the bugs off the wings,
prop, and cowl. (I keep the windshield clean)

The old gal is almost clean enough to take up to the ramp for a wash
job.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com





"Roger" wrote in message
...

I've spent the better part of an hour and a half on the net searching,
tried to get into the ABS site which appeared to be down, spend
several hours searching through what manuals I have, but I couldn't
find the torque required for the spark plugs in an IO-470N.