Recognize this heat shield? (Page 3/3)
fierofool DEC 09, 09:32 AM
The knockout could have been removed from this one, but this is from an 86SE Getrag equipped car.


This is from an 86GT automatic equipped car.
pmbrunelle AUG 20, 10:26 PM
Old thread revival, but my question kind of follows on with the discussions, and the pictures are helpful (nice to see a pic of my old Fiero ).

What purpose does this shield have, for a manual / V6 car (i.e. my present Fiero)?

Ogre suggested shielding of L4 electrical parts from the muffler's radiation, but on the V6 there's not much other than the side of the engine block and trunk-side manifold.

I'm considering deleting it, as it seems to get in the path of the engine during cradle installation / removal... My mind is not set; I am considering both options (keep it or ditch it).

EDIT: That "wing" over on the left side, below the distributor air cooling tube, is bent towards the trunk-side manifold. The wing in the shield follows (albeit at a distance) the path of the trunk-side manifold and cross-over pipe.

Because the wing is bent towards the trunk-side manifold, as if to surround it, rather than being being towards the muffler, I am led to believe that the shield exists to block radiation from the manifold from reaching the trunk... and I'm not sure what else...

However, since the wing is bent opposite to the muffler, I don't believe that the shield's main purpose is to prevent muffler radiation from reaching the engine.

But, I am not sure.

[This message has been edited by pmbrunelle (edited 08-20-2019).]

olejoedad AUG 20, 11:19 PM
Just remove it when dropping/reinstalling cradle, then reinstall it.

It shields the trunk wall from radiant energy from the exhaust manifold.
Toddster AUG 21, 10:49 AM
Put it in the recycling bin. The first thing I do when I get a pre-88 is rip out the blower motor, cooling tubes, heat shields and clean up the engine bay by using a roll of thermal wrap on the exhaust manifolds and Y-pipe. It insulated much better, looks cleaner, and actually makes it possible to work on your engine with slitting your wrists.
pmbrunelle AUG 21, 06:31 PM
The idea of keeping the trunk from getting hot makes some sense, but then it doesn't make sense that the top of the trunk wall was left exposed, while it has a direct line-of-sight to the exhaust manifold.

I think I'm going to keep the shield for now; removing the shield is more work, as I'd need to cut off the mounts, grind down the spot welds, then prime and paint the spaceframe.

That time expenditure will slow down getting my Fiero back on the road from its long project.
fierosound AUG 21, 07:10 PM

quote
Originally posted by pmbrunelle:

Because the wing is bent towards the trunk-side manifold, as if to surround it, rather than being being towards the muffler, I am led to believe that the shield exists to block radiation from the manifold from reaching the trunk... and I'm not sure what else...

However, since the wing is bent opposite to the muffler, I don't believe that the shield's main purpose is to prevent muffler radiation from reaching the engine.



On the 4-cylinder cars, it seems to shield the distributor (don't know about DIS) from the muffler's radiant heat.
I added the brackets and heat shield to my 84 Indy for this purpose.

My 87 GT V6 Getrag 5-speed never came with one (no brackets for one either).
But as mentioned, I don't see what point there would be in putting one in (have FOCOA headers now).

EDIT: Oddly enough, in the P22 Parts Book it is identified as: Shield, Engine Compartment RR Dust-RH

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[This message has been edited by fierosound (edited 08-21-2019).]

Spadesluck AUG 22, 12:23 AM
I pretty much did what Toddster did. However I had my motor/cradle out when I did it. I removed all my heat shields, blower motor, and cooing tubs. I did wrap my headers though. I drove 4,000 miles in 3 weeks across the US in June and I had not heat problems and nothing broke.