[DeTomaso] water pump mounting hole repair
Doug Braun
doug at silicondesigns.com
Wed Jun 2 16:30:19 EDT 2010
McMaster-Carr lists the max OD for a 5/16-NC18 Heli-coil at 0.400" which is
larger than the 0.368" ID of a 7/16-NC14 threaded hole. This means I'd be
burning my bridge for trying to use the far stronger EZ-Lok threaded insert.
Doug
-----Original Message-----
From: Ken Green [mailto:kenn_green at yahoo.com]
Sent: Wednesday, June 02, 2010 12:33 PM
To: JDeRyke at aol.com; detomaso at realbig.com; Doug Braun
Subject: Re: [DeTomaso] water pump mounting hole repair
If you don't need a lot of strength, what if you cross-thread the
3/8 hole with a tap for a 5/16 helicoil and add some filler like JB weld
when you thread the helicoil in, maybe that would work? Kind of a cludge,
but might be good enough?
Ken
--- On Wed, 6/2/10, Doug Braun <doug at silicondesigns.com> wrote:
From: Doug Braun <doug at silicondesigns.com>
Subject: Re: [DeTomaso] water pump mounting hole repair
To: JDeRyke at aol.com, detomaso at realbig.com
Date: Wednesday, June 2, 2010, 11:33 AM
For two reasons
1) Because I don't want to ruin the valuable 1970 original water
pump
casting by drilling it's thru hole out to 3/8".
2) The judges check the heads and head markings on the water pump
bolts.
These are indented head bolts which if you file down an indented
3/8 head,
the indent will disappear.
Do you think that not enough meat will be present in the casting
to support
the threaded-insert?
Doug
-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of JDeRyke at aol.com
Sent: Wednesday, June 02, 2010 10:25 AM
To: doug at silicondesigns.com; detomaso at realbig.com
Subject: Re: [DeTomaso] water pump mounting hole repair
Doug, since you seem to want to rescue this thing at any cost, why
not take
the oversize 3/8" bolt and carefully file its hex down to a
5/16"-size. In
place, no judge will see the bolt threads or shank. Whatever, good
luck- J
Deryke
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