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| Insulation around engine bay...? (Page 3/5) |
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eti engineer
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DEC 03, 09:04 PM
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| quote | Originally posted by Patrick:
I believe it's primary purpose in the engine bay is for sound deadening. It's secondary purpose is to irritate the skin of anyone working around it back there.  |
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LMAO!!! Tell me about it.!!! I learned to hate that stuff!! But mine was still in good shape, so I kept it, for whatever it's worth...
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fieroguru
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DEC 04, 07:11 AM
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As you look to replace the engine bay insulation, make sure it is designed for the application.
There has been at least 1 3800 swapped Fiero burn to the ground because the aftermarket insulation came free and drooped down and rested on the exhaust.
Not all insulation products are designed for direct contact to an 800+ degree surface. I much prefer steel heat shields with a proper air gap for this reason.
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theogre
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DEC 04, 10:29 AM
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Sides are to block noise. From road noise to engine noise to damped the Strut Towers sheet metal acting as sound boards to echo and/or amplify any noise like guitar violin etc. bodies.
Firewall blanket and interior trim block engine heat and noise getting thru the wall. That's why many replace the firewall blanket w/ better material.
| quote | Originally posted by Rickady88GT:
I chose to take it all out and repaint the engine bay. The insulation plugs or restricts ventilation holes on each side. But I will say that the side may be for sound insulation, the front and rear need to have a good layer of insulation. I have seen luggage with melted and burned spots from being in the trunk. |
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GT have "extra" vents that doesn't add much air flow but many think side insulation can block airflow. If anything, the Strut tower and hardware block most of the extra venting area over that.
"But engine bay is too hot"
Very unlikely... see Fiero Engine bay vs Heat. http://www.fiero.nl/forum/Forum2/HTML/141784.html
Isn't hard to make temp recorder but need more parts then just ardinuo board that most won't buy for 1 time project. Can buy a temp meter w/ long thermocouple(s) so a helper can read while driving but most won't buy for same reason. (I have both and rarely use them and need to remove batteries to protect them.)
Hot Trunk... This often involves another "insulation type..." Heat Shields.
Many Shields are missing because some fool took them out or rotted and fell off. Shields block Exhaust IR heating whatever behind. Shield try to get hot but thin metal and airflow to 1 or both sides it can't get hot to pass heat to things protected.
2 large Shields front and back. May depend on engine have more too. Trunk wall for 4 cyl has 2nd smaller shied w/ a hole or knockout where AT dip tube goes thru. Haven't seen a V6 in decades to see if has same, different or no shield. If there, bolted to the wall w/ 3 or 4 self tappers only at top of the shield. If V6 had No Factory shied there then the mounting holes have no damage/treads by the bolts.
Even w/ all shield in place... Don't keep cold/freezing foods in the truck even for a few miles. Between engine/exhaust heat and sun/weather heating the trunk will melt frozen food fast, worse in "summer." Engine heat the trunk but weather > 80-90° and trunk heat doesn't go out fast or not at all. People put MSD box etc in the truck can have problems too. Hot trunk w/ parts that generate more heat is a bad idea. (Weather Heating and people trapped in a trunk for whatever reason is why newer cars have latch release pull knobs etc. required by DOT/NHTSA.)------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave
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82-T/A [At Work]
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MAR 02, 08:27 PM
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Reviving this thread, because I'm curious if anyone came up with an alternative for the insulation?
I removed mine at one point back when my Fiero was running well, and it made a noticeable increase in sound in the cabin. It wasn't all good noise either... like, it didn't give a throaty roar inside, it was just louder, and I also definitely noticed increased road noise (like Ogre said). The only reason I removed it was because it was getting so ragged by ~2010, that it was starting to fall apart, and I just figured it was better not even being there at that point. It had enormous tree fasteners that I kept just in case I decided to replace it with something.
Like the OP on here, I was thinking about going with Lizardskin or something like that. Curious if anyone has done anything? Advance Auto sells rubber spray, which essentially does the same thing... and you can paint over it too. I did the entire undercarriage of my 1973 VW Bus, but not sure I want to do that in my Fiero's engine bay... looking for a classier solution.
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sleek fiero
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MAR 02, 09:41 PM
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82-T/A Use a little caution with the rubber coating. It is not fireproof and might be an application that goes up in smoke. Just saying. sleek fiero
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Spadesluck
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MAR 02, 10:19 PM
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Mike in Sydney
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MAR 02, 10:47 PM
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Dynamat. Pricey but good.
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PhatMax
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MAR 02, 10:52 PM
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82-T/A [At Work]
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MAR 03, 09:25 AM
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| quote | Originally posted by sleek fiero:
82-T/A Use a little caution with the rubber coating. It is not fireproof and might be an application that goes up in smoke. Just saying. sleek fiero |
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RGR, good point. Thanks Sleek!
| quote | Originally posted by Spadesluck:
I am eyeballing this stuff: Heat Shield |
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Oooh, that looks decent... it's VERY inexpensive too. I wonder what the weight is per square foot?
Lots of positive comments... though it says hood, so I don't know how well it would be to place it right on firewall inside of the engine bay facing the engine... but it does show someone with direct fire up against it, haha.
| quote | Originally posted by Mike in Sydney:
Dynamat. Pricey but good. |
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I have a ton of this that someone gave me years ago... I've got to find it, but I assume this was mostly only for the inside?
Seems pretty awesome, what's your experience been with it? Did you basically replace the old insulation (same shape / etc.)?
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olejoedad
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MAR 03, 10:33 AM
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The ThermoTec product works very well, and the brackets on the firewall will keep it in place - no glueing needed.
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