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old holes in firewall

J

johnthecontractor

Member
My RV has had numerous changes over the years. It has had engine swaps that resulted in control line changes, inverted oil system at times, smoke systems, various ignition systems, and now has several holes in the firewall. I would like to cover or fill these old holes. What are the preferred methods?
 
probably you could spend 20 times more from an aircraft supply but i would/have used appropiately sized ''washers'' on both sides of wall with a nut and bolt to secure it.maybe sandwich proseal to prevent any possibility of movement.
 
Conduit box knockouts

If sizes match the hole, Galvanized conduit knockout plugs from your big box aviation isle with a little 3M 2000 work well.
 
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