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-   -   Coil Spring Plates (https://67-72chevytrucks.com/vboard/showthread.php?t=588381)

72tutone 07-12-2013 03:12 PM

Coil Spring Plates
 
2 Attachment(s)
After cleaning up my frame I noticed right where the spring perch mounts to the plate on the frame, there is some rust accumulating.
Is it safe to remove the rivets and clean up and bolt back with some grade 8?
Any particular bolt size that is good for stock rivets? I hear 10mm might work?
Thanks

vegadesign 07-12-2013 03:14 PM

Re: Coil Spring Plates
 
should be just fine with grade 8 bolts, from the pic tho looks like they are kinda sagging in the middle?

72tutone 07-12-2013 03:29 PM

Re: Coil Spring Plates
 
Yea that is rust in the middle that is making them sag.
I wanted to grind off the rivets, clean em up and bolt em back in.
I hear 10mm or 7/16 will do the trick? Any ideas as to which will fit better?

vegadesign 07-12-2013 04:50 PM

Re: Coil Spring Plates
 
more than likley 7/16

67c10rustbuket 07-12-2013 08:18 PM

Re: Coil Spring Plates
 
I just went out and measured a rivet hole and it measures .41". I have been drilling them out to 7/16" and installing 7/16" (.4375") grade 8 bolts. A 10 mm bolt converts to .3937" so it may be decent in a .41" rivet hole but you don't want to have any slop in the hole because it will shear off easily on impact.

67ctener 07-13-2013 02:18 AM

Re: Coil Spring Plates
 
Lmc makes a complete kit to replace all rivets with grade 8.
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midniteblues 07-13-2013 09:40 AM

Re: Coil Spring Plates
 
you can get the rivits out and run a 7/16 tap through the holes without drilling them helps keep everything snug.

i will say the tap will not take a full bite into the hole but it will leave a good enough thread too be able too snug the metal together without useing a nut
(just sayin)of course your gonna wanna put nuts on.

you can attack the rivit with a combo of a cut off wheel/grinding disc,drill,or a cold chisel &bfh.
what i found too work good was to cut a x into the head of the rivit and knock it off with the chisel.of course you could drill a hole an knock'em off also


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