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March 6th 08, 01:10 AM
My mechanic is getting ready to install new (hideously expensive) fuel
valves in my Comanche and he indicated that he did not want to use
teflon tape on the pipe fittings. Any ideas why teflon is undesirable
for fuel applications? I thought that it was pretty inert.

-ifsc

Capt. Geoffrey Thorpe
March 6th 08, 01:13 AM
> wrote in message
...
> My mechanic is getting ready to install new (hideously expensive) fuel
> valves in my Comanche and he indicated that he did not want to use
> teflon tape on the pipe fittings. Any ideas why teflon is undesirable
> for fuel applications? I thought that it was pretty inert.


Fragments can get into carburetor jets or injector orifices and block the
flow.

--
Geoff
The Sea Hawk at Wow Way d0t Com
remove spaces and make the obvious substitutions to reply by mail
When immigration is outlawed, only outlaws will immigrate.

Denny
March 6th 08, 12:07 PM
When folks have questions like this, here is the source for many of
the answers:

http://www.tagpilotsupply.com/browseproducts/Acceptable-Methods--Techniques---Practices.HTML

denny

Ross
March 7th 08, 06:53 PM
wrote:
> My mechanic is getting ready to install new (hideously expensive) fuel
> valves in my Comanche and he indicated that he did not want to use
> teflon tape on the pipe fittings. Any ideas why teflon is undesirable
> for fuel applications? I thought that it was pretty inert.
>
> -ifsc
My mechanic will not use it either. I think pieces getting loose in the
fuel path.

--

Regards, Ross
C-172F 180HP
KSWI

John Kunkel
March 7th 08, 09:29 PM
"Capt. Geoffrey Thorpe" <The Sea Hawk At Wow Way D0t C0m> wrote in message
news:tfydnWk_eoK72FLanZ2dnUVZ_uWlnZ2d@wideopenwest .com...
> > wrote in message
> ...
>> My mechanic is getting ready to install new (hideously expensive) fuel
>> valves in my Comanche and he indicated that he did not want to use
>> teflon tape on the pipe fittings. Any ideas why teflon is undesirable
>> for fuel applications? I thought that it was pretty inert.
>
>
> Fragments can get into carburetor jets or injector orifices and block the
> flow.

The only way tape fragments can enter the system is if the tape is applied
incorrectly, another case of a fine product getting dissed because of human
error.

Capt. Geoffrey Thorpe
March 7th 08, 11:27 PM
"John Kunkel" > wrote in message
. ..
>
> "Capt. Geoffrey Thorpe" <The Sea Hawk At Wow Way D0t C0m> wrote in message
> news:tfydnWk_eoK72FLanZ2dnUVZ_uWlnZ2d@wideopenwest .com...
>> > wrote in message
>> ...
>> Fragments can get into carburetor jets or injector orifices and block the
>> flow.
>
> The only way tape fragments can enter the system is if the tape is applied
> incorrectly, another case of a fine product getting dissed because of
> human error.


Yes, if you leave 2 threads uncovered at the end, the tape will not enter
the system when you assemble it. But, the next time you disassemble it, bits
may be left on the threads which may then get pushed into the sytem when you
re-assemble.

I ain't diss'n nothing. I've used miles of the stuff myself.

--
Geoff
The Sea Hawk at Wow Way d0t Com
remove spaces and make the obvious substitutions to reply by mail
When immigration is outlawed, only outlaws will immigrate.

John Kunkel
March 8th 08, 07:36 PM
"Capt. Geoffrey Thorpe" <The Sea Hawk At Wow Way D0t C0m> wrote in message
news:saadned3As_EUkzanZ2dnUVZ_qGknZ2d@wideopenwest .com...
> "John Kunkel" > wrote in message
> . ..
>>
>> "Capt. Geoffrey Thorpe" <The Sea Hawk At Wow Way D0t C0m> wrote in
>> message news:tfydnWk_eoK72FLanZ2dnUVZ_uWlnZ2d@wideopenwest .com...
>>> > wrote in message
>>> ...
>>> Fragments can get into carburetor jets or injector orifices and block
>>> the flow.
>>
>> The only way tape fragments can enter the system is if the tape is
>> applied incorrectly, another case of a fine product getting dissed
>> because of human error.
>
>
> Yes, if you leave 2 threads uncovered at the end, the tape will not enter
> the system when you assemble it. But, the next time you disassemble it,
> bits may be left on the threads which may then get pushed into the sytem
> when you re-assemble.


Like I said, human error.

David Lesher
March 9th 08, 03:44 AM
I have no idea if it's FAA Approved, but I used to use stuph called
RectorSeal instead of tape on the flare fitting on 0.25" steel sense
lines used on the pipeline. It was no problem with 700psi gasoline, etc.


--
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