Would like to confirm if the the heat shield above the muffler is bolted into the cross section of the rear trunk from underneath or is it welded in place?

Just learned I don't have one installed and the heat is baking my new paint in the trunk from underneath. Have one sourced already and will also be going with heat insulation matting for extra protection.

As we discussed only the early 1970 cars had them bolted on.
I don't see how it can be rewelded with the limited access to the rear brackets on the shield

For my 76, it was welded on. Since I replaced a portion of the rear trunk pan, mine is now SS pop riveted on.

Barefoot

My 75 is welded, I plan on using inserts to re-install once I remove and repair the trunk pan

Turn it into a bolt on and then cover over the bolts with some seam sealer and undercoating.

From what I have seen, all the 914/6 had them fastened by screws in the rear trunk, and the 914/4 were welded in place.

Bolt-in? Weld-in? Why not both?

My solution: weld in some simple brackets.

And then bolt on the heat shield.

I like it

As it turns out I was looking at this very thing today. I'm in the process of stripping the easily removed stuff prior to sending the car off for restoration. This car is a six, so the heat shield is attached with screws to the rear trunk floor, hidden under factory seam sealer. Here's one of them:

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There are six of them, located here:

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Here's a shot of the top side of the heat shield:

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And a detail of the mounting hardware:

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The shield is solid, but with surface rust, so it's going to the dippers prior to paint. I don't think I'll hide the fasteners under sealer when it goes back together, though.

Guy

Maybe instead of the shield - 1 or two of these?

https://www.rix914parts.com/store/p44/Heat_Sheild_Mat.html

I have a 914/4 from May 1970.
My car has a heat shield attached with screws.


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Not easy to get at but, it can be welded back in.

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Interesting, the much clearer pictures of the /4 show a similar method of attachment but different locations. I wonder what the reason was?

Thanks for chiming in and the solutions are great. Embarrased to find out that the heat shield is indeed there as evidenced at the top of this photo from suspension swap Saturday.


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Still can't figure out why the paint in the trunk has heat damage, however @Flacaproductions has it right as AASE Sales sells precut sections of that same heat insulating material from Thermal Products.

https://www.thermalcontrolproducts.com/our-.../zeroclearance/

The plan is to install that on the shield along with another section underneath the trunk mat. Ordered this sound dampening trunk mat material from Porsche Classic and will custom cut and run that. Of course its not original, but I still have my original mat if I ever show the car.

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Early /4 cars had them screwed in as well ...

Thanks Andy, I stand corrected. There are so few 70 or 71 914 in Canada. When did the detachable shield end?

The 'screw in' early one is found in both 4 and 6 cylinder cars.
There are at least two .....maybe three weld in versions.

My guess (and it's just a guess) is it might not be not heat damage that's messing with your paint. At least not directly. I had the same issue on my yellow car and it turned out there was a little oil / contamination still in the trunk when the paint was applied. As whatever oil got warm it spread and broke the adhesion.

Planning on installing my new trunk panel this weekend and have been thinking about what route I will use for the heat shield.

I like the @bkrantz option

But first, I would appreciate a basic information. Can someone give me the distance from the back edge of the shield to the rear panel of the car?

Thank you!

bkrantz's picture as reference.

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Welding a shield in is easy.
Mark where the brackets contact the trunk floor, drill holes in floor, then
plug weld to the brackets from the trunk side.
Grind to taste.

Sure, but I like the idea of being able to remove it.

But my main question is; what's the distance from the shield's back edge to the rear body panel?

Just over 1-1/2 inches, from inside the rear body panel (above the lip) to the trailing edge of the muffler heat shield.

BTW, I got hi-temp powder coating done on the shield.

Beautiful.

Very nice

Thank you for the info.