Marcos Maniacs

From: MarcosManiacs@yahoogroups.com [mailto:MarcosManiacs@yahoogroups.com]
On Behalf Of MarkD
Sent: 14 January 2012 13:03
To: MarcosManiacs@yahoogroups.com
Subject: [MarcosManiacs] Wood chassis front keep nuts replace or modify?

 

  

This weekends project is to work on the rebuild of all the front 1/4x28
keepnuts which hold the metal frame and motor mounts. They had all rusted to
a point of not coming apart. I had to drill most of the heads off to remove
all the parts for blasting and painting. 
I would like to ask others who have done this repair if they just replaced
with the same keepnuts or if the made a change in design?

My concern is not the reassembly as that is straight forward, but since one
of the bolts makes a ground point for the wiring that bolt may need to be
removed from time to time to clean the contact or to add a wire. I know the
nuts will rust once again and it will become difficult to remove the bolts
should I need to do so.

I have purchase 1/4" stainless steel plate and am planning to make backing
plates which will be screwed in place from the inside and then drilled and
tapped for all the 1/4x28 screws. The stainless is non magnetic and should
not rust. This assembly will provide a much better support as well, since
the load is spread over all the area of the plate. I would also use
stainless bolts with antisieze compound.

Thoughts or comments please.

Mark

>
> Mark,
> 
>  
> 
> We had to replace the metal plates on my car, but only the ones which hold
> the front sub-frame in place.  We discovered that the plates had shed their
> anchor nuts and the guy who rebuilt the chassis had simply put large wood
> screws into the holes!!
> 
>  
> 
> We decided to cut a 3 inch diameter hole in the wood box section and work
> from there.  We also decided to make these plates "L" shaped so that they
> come down on the inside of the box section in front of the engine mounts.
> This spreads the load and gives more rigidity.  Once done you simply refit
> the 3 inch disc you have cut out and glass fibre it in.
> 
>  
> 
> One way of making the electrical contact is to have a flanged washer with an
> extra bolt hole for this purpose.  There is then no need to remove it.
> 
>  
> 
> I think it is a good idea to have anew keep nut arrangement, particularly as
> nobody will see it.
> 
>  
> 
> Have a look on the Marcos Section of www.motorsnaps.com
> <http://www.motorsnaps.com/>  
> 
>  
> 
> Best wishes,
> 
>  
> 
> John 
> 
>  
> 
>   _____  
> 
> From: MarcosManiacs@yahoogroups.com [mailto:MarcosManiacs@yahoogroups.com]
> On Behalf Of MarkD
> Sent: 14 January 2012 13:03
> To: MarcosManiacs@yahoogroups.com
> Subject: [MarcosManiacs] Wood chassis front keep nuts replace or modify?
> 
>  
> 
>   
> 
> This weekends project is to work on the rebuild of all the front 1/4x28
> keepnuts which hold the metal frame and motor mounts. They had all rusted to
> a point of not coming apart. I had to drill most of the heads off to remove
> all the parts for blasting and painting. 
> I would like to ask others who have done this repair if they just replaced
> with the same keepnuts or if the made a change in design?
> 
> My concern is not the reassembly as that is straight forward, but since one
> of the bolts makes a ground point for the wiring that bolt may need to be
> removed from time to time to clean the contact or to add a wire. I know the
> nuts will rust once again and it will become difficult to remove the bolts
> should I need to do so.
> 
> I have purchase 1/4" stainless steel plate and am planning to make backing
> plates which will be screwed in place from the inside and then drilled and
> tapped for all the 1/4x28 screws. The stainless is non magnetic and should
> not rust. This assembly will provide a much better support as well, since
> the load is spread over all the area of the plate. I would also use
> stainless bolts with antisieze compound.
> 
> Thoughts or comments please.
> 
> Mark
>