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Tim K Tim K is offline
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Join Date: May 2003
Location: Winnipeg
Posts: 750
Fuel Injectors and Anti-Seize

I need to prevent the threads from galling/cold welding between an aluminum 'fuel rail' and a brass fitting with NPT threads. However I'm paranoid about the possibility of getting some of this junk into the (electronic) fuel injector. What can I use? I purchased Loctite C5-A (Copper based) as it is appropriate for use with aluminum and brass.

I found a service bulletin on the web for an air cooled air plain engine where it describes the application of anti-seize to a fuel fitting up stream of a fuel injector. Basically it describes the sparing application a few threads up from the end of the male fitting.

The first time I didn't use anything and sure enough the threads got a little galled up when I took it apart. Now there's the issue of what the metallic bits from the threads would do to the injector...

Can anyone speak to this? I know enough not to use Teflon tape, but that's where my knowledge ends.

Any help here would be appreciated.

Tim K
Old 09-08-2009, 08:18 AM
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