Mailing List flyrotary@lancaironline.net Message #60265
From: Jeff Whaley <jwhaley@datacast.com>
Subject: Multiple coollant pressure Caps
Date: Tue, 8 Oct 2013 13:34:41 +0000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

My original radiator was custom-built and had no filler neck.  I bought a new stock radiator that comes with a filler neck and pressure cap.  I already have an expansion tank high on the firewall with a filler neck and pressure cap.  The radiator will be mounted under the engine.  In this scenario is it acceptable to have 2 pressure caps?  I don’t really want the second cap and am considering getting it welded shut - but do I have to?  If the lower-mounted pressure cap has the highest pressure rating I’m thinking it should be okay.  Has anyone tried this?

Jeff

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