From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: AN16 hose fitting question
To: flyrotary
Date: Tue, 25 Mar 2003 20:12:59 -0500
Message-ID: <web-2086552@logan.com>
In-Reply-To: <000f01c2f32a$fb7d8b00$0201a8c0@rad>
MIME-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"; format="flowed"
Content-Transfer-Encoding: 8bit

Posted for <13brv3@mchsi.com>:

Oops, I meant to include this question in the last message.  
   
Since I ordered AN16 fittings on the radiator, I will need have these on the
water pump housing, and thermostat housing as well.  What's the best way to
do this?  I noticed that Earls sells a fitting that goes from 1" NPT to
AN16, and I wonder if the housings can be tapped to accept the 1" NPT.  It
looks like the ID of the housing is from 1-3/16" to 1-1/4", but when I try
to find drill size info for a 1" NPT, I find different sizes.
Unfortunately, in a brief look today, I was unable to lay my hands on a
fitting, or tap locally, and I hate to order both, only to find out that
they won't work out.  If the fitting will even thread in loosely, I could
use some Tracy (I mean JB) Weld to help secure it.  In the back of my mind,
I'm thinking that I read where someone did just what I'm proposing.
   
The other option of course is welding to the housings, but as I've
mentioned, my torch abilities are limited to melting stuff :-)    
   
Rusty
Turbo 13B powered RV-3 (experimental aircraft)...Be Afraid :-)
1993 RX-7 R1... Not stock, carry bail money :-)
   

[The recommended drill size for a 1"NPT tap is listed as 1-5/32... not exactly 
your run-of-the-mill drill bit.  A cheap taper shank bit in that size is over 
$30, the good ones start out in multiples of that price.  One inch pipe taps 
are also prety expensive, although you might be able to find one on Ebay at a 
reasonable cost.  You may find it cheaper to give the pump housing to a friend 
who works in a machine shop and pay him to bore and tap it for you... just a 
thought.

       <marv>        ]