[DeTomaso] water pump mounting hole repair
Doug Braun
doug at silicondesigns.com
Wed Jun 2 14:35:45 EDT 2010
That would require a nut on the end of the stud which would not appear the
same as the proper indented hex head of the original bolt, but at least I
wouldn't have to drill out my valuable water pump to fit the larger bolt.
Doug
-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of Ken Green
Sent: Wednesday, June 02, 2010 10:54 AM
To: DeTomaso Forum; Doug Braun
Subject: Re: [DeTomaso] water pump mounting hole repair
I've seen stepped studs somewhere. Maybe you can find one with the correct
threads and just screw it in.
Ken
--- On Wed, 6/2/10, Doug Braun <doug at silicondesigns.com> wrote:
From: Doug Braun <doug at silicondesigns.com>
Subject: [DeTomaso] water pump mounting hole repair
To: "DeTomaso Forum" <detomaso at realbig.com>
Date: Wednesday, June 2, 2010, 10:06 AM
In my younger days (30 years ago), one of the water pump bolt holes in my
block stripped out. Back in those days, I hadn't even heard of heli-coils
so I did a backyard fix by drilling and tapping the errant 5/16-NC-18 hole
out
to 3/8-NC16. I then drilled out the corresponding hole in the water pump
to 3/8, installed a very non-stock looking 3/8 bolt and went merrily on my
way.
Fast-forward to now and I'm using the same block in a car that will be
concours judged. The water pump I'll be using is an original, unmolested,
"D0OE-D" 1970 water pump and I don't want to destroy it's value by drilling
out one of it's holes to 3/8 in order to use it. So I'm looking for an
alternative.
Since the heli-coil approach is no longer viable, I'm considering using
either a 90259A139 or 92070A120 threaded insert from McMaster-Carr
http://www.mcmaster.com/
The hole in question can be seen here:
http://www.poca.com/index.php/gallery/?g2_itemId=21099
and is the one near the center of the picture next to right side of the cam
sprocket. After tapping the hole to 7/16-NC14, the block will have about a
0.13" margin of cast iron block material left at the lower left quadrant of
the hole and a greater margin than that for the other 3 quadrants.
Does anyone see a risk in using this approach? Is one of the two threaded
inserts I referred to above superior to the other in this application?
Doug Braun, blue 73L #5505
More information about the DeTomaso
mailing list