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Posted by: bkrantz Apr 14 2020, 07:55 PM

Anybody have ideas for mounting the muffler shield besides welding to the underside of the trunk floor? Any good reasons not to?


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Posted by: roblav1 Apr 14 2020, 08:04 PM

You sure can't glue it on! No way on drilling holes to bolt it in place either.

Posted by: PanelBilly Apr 14 2020, 08:06 PM

I left it off my muffler is in a different location anyways

Posted by: Bmw635 Apr 14 2020, 08:26 PM

Weld 3 upside down U on the same side and weld a nut on the single side so you can slide on the 3 and bolt down the 1 so it can be removable.

Posted by: Spoke Apr 14 2020, 08:28 PM

I welded nuts to the hangers on the heat shield and drilled holes in the trunk floor. This way it's just a bolt on/off item.



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Posted by: davep Apr 14 2020, 09:25 PM

I believe that most of the 914/6 used screws.

Posted by: sixnotfour Apr 15 2020, 02:00 AM

AH The 70's


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Posted by: falcor75 Apr 15 2020, 03:56 AM

I made a new one in aluminium and used the rear swaybar holes and made little brackets that connect the rear lower edge to the holes that the rear valance mount too.

Posted by: mb911 Apr 15 2020, 05:40 AM

I just used self taping stainless sheet metal screws from the trunk down into the shield

Posted by: rgalla9146 Apr 15 2020, 06:42 AM

I like.
I'm doing it a bit different though, using curved sheet to mimic the original.

Posted by: Tdskip Apr 15 2020, 07:49 AM

Why not weld? Aren’t there mobile welders in your area if you don’t have the equipment?

Related question - is there a guide to correct positioning?

Posted by: Retroracer Apr 15 2020, 09:45 AM

I did the same. Pragmatic solution!

- Tony

Posted by: Tdskip Apr 15 2020, 09:47 AM

@http://www.914world.com/bbs2/index.php?showuser=9892 - why not just hit those screw holes with spot welds?

Posted by: mb911 Apr 15 2020, 09:54 AM

@http://www.914world.com/bbs2/index.php?showuser=21666 I had already painted everything before I knew exactly where to position it based off of where the muffler would fit in the chassis

Posted by: Tdskip Apr 15 2020, 09:56 AM

@http://www.914world.com/bbs2/index.php?showuser=9892 - there is a lesson for us in there somewhere....

Posted by: barefoot Apr 15 2020, 12:43 PM

I used SS pop rivets which worked very well

Barefoot

Posted by: Garland Apr 15 2020, 12:51 PM

Need to perform this task myself. After reading this thread I’m thinking epoxies, J&B weld since I don’t want to repaint the inner trunk, or add holes. It’s a light weight part.

Posted by: Mark Henry Apr 15 2020, 02:03 PM

Epoxy is great stuff but it depends on the app, for this it will hold for awhile but it will one day fail or it could just pull the paint right off.
Pretty high vibration and high heat prone area and besides making epoxy work upside down is a PITA.

Posted by: mb911 Apr 15 2020, 03:43 PM

Stainless self tapers really are the way to go..

Posted by: live free & drive Apr 15 2020, 08:48 PM

This screw would be a good candidate:

https://www.mcmaster.com/93406a312

Posted by: bkrantz Apr 15 2020, 09:27 PM

Thanks for all the suggestions. I am motivated to make the shield detachable so that during prep and paint I can get clear access to the underside of the floor.

I prefer not to screw thru the trunk floor, since a hole is a hole (and in my shiny new floor section). I would rather weld the stand-off brackets to the trunk floor and attach the shield to the brackets with bolts (or screws). Or use weld-on studs on the floor (with spacers) and attach the shield directly.