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Date:         Mon, 14 Jun 2010 22:26:17 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: noise SOLVED. Now need to Heli-Coil?
Comments: To: pickle vanagon <greenvanagon@GMAIL.COM>
In-Reply-To:  <AANLkTiktWMGDCHiPihO1aNBwWIh2QDzoeXsitvBSAGfE@mail.gmail.c om>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 09:55 PM 6/14/2010, pickle vanagon wrote: >But I think I'm going to try the helicoil repair this weekend. I don't want >to run 3 bolts long term. Is the insert really that hard to install? I >figure, after I drill and tap, that the insert must be pretty easy to get >in. And, where I'm' doing it, I'll have easy access. Not like doing this >in an engine compartment.

The hardest part is getting the tap to go in straight. Compared to that, most everything else is dead easy. If you're not used to drilling in steel -- use a drill containing cobalt if possible, use cutting fluid (Tap Magic, lard, whatever you're going to use for tapping). Keep the drill speed way down (for this size I'd stay below 700 rpm) and use *heavy* feed pressure. You want the tool to cut and not rub. Watch out -- if the drill snatches as it breaks through, it will snatch your wrist if you let it. If the drill dulls, sharpen or replace it, then turn slower and push harder. But take great care that the tool is always cutting. If it rubs it may work-harden the steel and then you'll have a much more difficult time.

Yours, David


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