[NSRCA-discussion] Heli coils

[jonlowe at aol.com]

With all of this talk on Helicoils for exhaust and glowplugs,  I 
thought I'd mention that Clarence Lee (yes, the engine guru that wrote 
for years in RCM) advertises in Model Aviation in the classified 
section about doing inserts for glowplugs, and doing a brass insert for 
exhaust threads on four stroke engines.  He has done several glow plug 
inserts in OS 1.60 heads for me, and a brass exhaust insert on a YS1.20 
for my Dad and a friend of mine.  He does exceptional work, fast, and 
at a very reasonable price, cheaper than buying the tools to attempt it 
yourself, and far cheaper than a new head. And you cannot duplicate 
what he does on exhaust threads without a whole lot of expensive 
equipment. He has the correct machine tools and fixtures to do it 
right, without any danger of getting things in crooked, which is easy 
to do with Helicoils.  I cannot recommend anyone more highly.  To me, 
it just isn't worth it to attempt it myself, because I have screwed up 
helicoils before in larger sizes when I was racing cars, and it is no 
fun even when you have more room to work than we do.

Jon Lowe

-----Original Message-----
From: Bob Richards <bob at toprudder.com>
To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
Sent: Thu, 23 Mar 2006 06:07:57 -0800 (PST)
Subject: Re: [NSRCA-discussion] Heli coils

Dohhh!!! I guess that is the propshaft size of some engines I was 
thinking of.
 
And they DON"T have the 1/4-32 listed.
 
Bob R.


John Ferrell <johnferrell at earthlink.net> wrote:
Did you mean 1/4-32 for the glow plug?
 
John Ferrell   
http://DixieNC.US

 
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