Today's Message Index:
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1. 02:50 PM - Sealant for hole plugs (Ralph E. Capen)
2. 03:36 PM - Re: Sealant for hole plugs (FLYaDIVE)
3. 04:52 PM - Re: Sealant for hole plugs (Ralph E. Capen)
Message 1
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| Subject: | Sealant for hole plugs |
I'm looking to re-seal the injector/primer hole plugs in the underside of my cylinder
heads.
The injector nozzles in the top are supposed to be installed with anti-sieze and
torqued to 40-60 inch-pounds.
I'm thinking the 40-60 inch-pounds would be consistent and either anti-seize or
Loc-Tite 565 (white) would be used on the plugs. These are 1/8" NPT tapered
fittings if I recall correctly.
Your thoughts please,
Ralph Capen
Message 2
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| Subject: | Re: Sealant for hole plugs |
HMMmmmmmm ...
Where does the 40 - 60 in/lbs come from? If it is just for 1/8" NPT then
ANY thing on the threads will act as a lubricant and you will actually be
going over the 40 - 60 in/lbs.
Is it a number given WITH the anti-seize?
Bottom line - Pipe threads are totally different than straight threads.
Just snug it up and go 1/4 turn further and you are done.
AND... The plug has a Allen socket... Did you do your math for the length of
the Allen Wrench?
Do you really think Lycoming uses a torque wrench for this!
Barry
On Tue, Sep 28, 2010 at 5:47 PM, Ralph E. Capen <recapen@earthlink.net>wrote:
> recapen@earthlink.net>
>
> I'm looking to re-seal the injector/primer hole plugs in the underside of
> my cylinder heads.
>
> The injector nozzles in the top are supposed to be installed with
> anti-sieze and torqued to 40-60 inch-pounds.
>
> I'm thinking the 40-60 inch-pounds would be consistent and either
> anti-seize or Loc-Tite 565 (white) would be used on the plugs. These are
> 1/8" NPT tapered fittings if I recall correctly.
>
> Your thoughts please,
> Ralph Capen
>
>
Message 3
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| Subject: | Re: Sealant for hole plugs |
Thanks for the response.....
That number came from my fuel injection system manufacturer and they
also specified anti-seize. I'll look up the spec in my lycoming manuals
and see if it is different - you may be right with snug + 1/4 turn.
I have an allen socket that adapts to 1/4" drive - no additional math
for the torque wrench.
But I still don't know whether to use anti-seize or 565.....
----- Original Message -----
From: FLYaDIVE
To: lycomingengines-list@matronics.com
Sent: Tuesday, September 28, 2010 6:33 PM
Subject: Re: LycomingEngines-List: Sealant for hole plugs
HMMmmmmmm ...
Where does the 40 - 60 in/lbs come from? If it is just for 1/8" NPT
then ANY thing on the threads will act as a lubricant and you will
actually be going over the 40 - 60 in/lbs.
Is it a number given WITH the anti-seize?
Bottom line - Pipe threads are totally different than straight
threads. Just snug it up and go 1/4 turn further and you are done.
AND... The plug has a Allen socket... Did you do your math for the
length of the Allen Wrench?
Do you really think Lycoming uses a torque wrench for this!
Barry
On Tue, Sep 28, 2010 at 5:47 PM, Ralph E. Capen
<recapen@earthlink.net> wrote:
<recapen@earthlink.net>
I'm looking to re-seal the injector/primer hole plugs in the
underside of my cylinder heads.
The injector nozzles in the top are supposed to be installed with
anti-sieze and torqued to 40-60 inch-pounds.
I'm thinking the 40-60 inch-pounds would be consistent and either
anti-seize or Loc-Tite 565 (white) would be used on the plugs. These
are 1/8" NPT tapered fittings if I recall correctly.
Your thoughts please,
Ralph Capen
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