Primer port, brass or steel plug?

[Michael Burbidge]

I'm removing the primer system from my used engine. Should I use brass or steel plugs to fill the ports?

Why?

Thanks
Michael

[rv9aviator]

I'm interested in knowing if there is a reason not to use brass plugs. I used brass plugs in my engine with a light coating of tite-seal. Brass plugs are used extensively in the die casting trade where I make my living and are subjected to more heat than an engine. The only question I would have is in their use in aluminum as all my usages are in tool steel.

Brassssssssssssssss

[chaskuss]

Originally Posted by rv9aviator

I'm interested in knowing if there is a reason not to use brass plugs. I used brass plugs in my engine with a light coating of tite-seal. Brass plugs are used extensively in the die casting trade where I make my living and are subjected to more heat than an engine. The only question I would have is in their use in aluminum as all my usages are in tool steel.

Brass and aluminum create a battery. Not a great idea for prevention of galvanic corrosion. See

http://www.eaa1000.av.org/technicl/c...n/galvanic.htm

My answer to Michael's original question would be "None of the Above". Use aluminum AN913 style plugs. See

http://www.aircraftspruce.com/menus/ha/an_plug.html

Charlie

[rv9aviator]

Thanks for the info. I sure hope the tite-seal insulates the brass from the aluminum. I'll pull a couple out at the next condition inspection to make sure there is not a problem.

[az_gila]

You could use the real Lycoming part # 1102 at a whopping $1.28

http://www.aeroinstock.com/products/...ail/index.html

[aerhed]

Don't panic Jim, all the injectors, temp sensors, and primer fittings are brass.