I wanted to install a heat shield for the underside of my hood to keep the paint from fading. This is what I came up with. I used Thermo-Tec Aluminized heat Barrier to create a "blanket" that I sewed to fit the hood's shape and attached it to the hood with M6x1.0 well nuts and 0.25" plastic clips. It keeps the hood remarkably cool.

Pictures.
1) Open hood shot:


2) Hood Latch:


3) Hood Prop:


Follow-Up Concerns:
a) Since part of the hoods function after the ngine is stopped is to act as a heat-sink, I will finish my post-shut-down fan timer to keep the Radiator and condenser fans on for a controlled amount of time after the engine has stopped. This will help evacuate heat and eliminate some heat soak.
b) A couple of the hex-head M6x16mm bolts contact the bumper when I close it. Nut very much, But I might dremmel them down just to be safe.
c) PCV valve rubs a little on the ThermoTec material. This will probably rub through the aluminum side of the material, as it isn't very tough. I'll make a patch to protect that small area.

I'll follow up to let you know how these "to-do's" turn out.

.:--:. .:--:. .:--:. .:--:. .:--:. .:--:. .:--:. .:--:. .:--:. .:--:.

<U>Follow up:</U> WOW! That Thermo-Tec stuff works incredibly well. The hood's temp never seemed to exceed atmospheric temps with it installed.
Problem was all that heat was being reflected abck into my engine bay, and above all I want ot avoid raising the temperature of things like my brake fluid, battery, belts, engine, etc. The opening under the window did not provide much cooling effect it seemed, and I have not finished my Fan timer yet.

Turns out my follow-up concern "A)" was VERY legitimate.

So I have removed the heat shield. If I remake it, I'll just protect the area above the headers. I looked at a new Accord at the dealership and it has a fibrous material covering the entire underside of the hood. I wonder what this material is?

With th extra Thermo-Tec that I have, I'll insulate the Upper/Lower intake arms and filter box.

Learning the hard way,
Karl




Modified by WOTTEG at 1:09 PM 7/19/2003

 

remove the space between the g and ] in [IMG ]
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WOTTEG &raquo;</TD></TR><TR><TD CLASS="quote">Pictures.
1) Open hood shot:


2) Hood Latch:


3) Hood Prop:


</TD></TR></TABLE>

 

My car is 9 years old w/ 140K miles, no problems w/ paint fade here.

 

I've never heard of said fade either, but it's a killer setup you put together.

you might add some spacer washers to the hood hinges in the back to help the hot air vent

 

my integra is almost 9 years old also and IMO the paint on the hood is in better condition than on some other parts of the car. Although i always did wonder if heat would effect it as the EK VTi i had a while back had heat shielding under there...anywho, it has done no harm so far, i guess i'll leave it for now.

 

My last Integra ('86) ended up with cracked/faded paint on the hood later in it's life.

The aluminized heat barrier is separated from the hood with the rubber head of the well nuts and 1.24" nylon washers.

 

Ok, I guess I coulda used one of those buggers a while ago. How much does it weigh?

 

were you running your wg with no DT? lol

 

ive always had a dumptube. I think that started happening when my motor was blowing. (headgasket blew, ringlands were shot and hairline cracked sleeve). I dunno how it got all the way up there though

 

turbo or non-heatshield header add new variables to the mix.

nice garage...want to toss an engine this way?

 

haha if you want an engine with a warped head, blown gasket, cracked ringlands and cracked sleeve haha notice all the black crud on one of the engines?

 

Nice work, but I don't think that's necessary unless you're running FI. My car is 9 years old too, and actually the underside of the hood actually looks better than the topside. Damn Florida sun.

 

The shipping package said 4lbs. I think it weighs less though.

 

my 89 Camry did end up w/ faded clearcoat on the hood, directly above the engine's valve cover... it did not have any kind of heat barrier under its hood, either. I guess it's just a matter of paint quality.

 

looks pretty cool. but doesn't that make the engine bay itself hotter?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dLo GSR &raquo;</TD></TR><TR><TD CLASS="quote">looks pretty cool. but doesn't that make the engine bay itself hotter?</TD></TR></TABLE>

Yes, hence the post shut-down fan timer mentioned in my original post.

 

Updated the original post. Seems I used the wrong material. . . . it works TOO well.

Live and learn.

 

Or you could just paint your car black . But for real, my friends Red 95 GSR hood faded real bad, definitly worse than the rest of the car.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by intekragsr &raquo;</TD></TR><TR><TD CLASS="quote">Ok, I guess I coulda used one of those buggers a while ago. How much does it weigh?

</TD></TR></TABLE>

hey.., thats my car on the left!

 

the paint fade is more likely due to neglect on the paint finish itself. Heat will accelerate the damaging process but its more likely from the sun rather than from the engine compartment.


for your ingenuity

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Downey &raquo;</TD></TR><TR><TD CLASS="quote">

hey.., thats my car on the left! </TD></TR></TABLE>

haha with those lovely s2k rims Man they look so good on your car!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IntEGNYC &raquo;</TD></TR><TR><TD CLASS="quote"> for your ingenuity </TD></TR></TABLE>

Thanks for the kind words.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by intekragsr &raquo;</TD></TR><TR><TD CLASS="quote">Ok, I guess I coulda used one of those buggers a while ago. How much does it weigh?

</TD></TR></TABLE>

awwww yeah, burn it to the ground we-todd style.


My friend bought a JDM front clip just recently. I noticed it had the fibrous material under the hood also. I might go over there and gank it from him since he's just going to toss the hood.

But this is something definitely worth looking into. The heat on my car has definitely faded my clear coat and it's working on the paint.

 

I would've kept the heat-barrier on and just vented the hood better...

you wanna send that stuff this way?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tweakmeister &raquo;</TD></TR><TR><TD CLASS="quote">I would've kept the heat-barrier on and just vented the hood better...</TD></TR></TABLE>

To you mean adding washers below the hinges? I opened the plastic hole in front of the passenger window to provide some high pressure. I didn't want to do the "washers under the hinge" thing.

The temps in the engine bay got extreme. The hood prop was too hot to hold for more than a second or two. My brake fluid was being heated from the engine compartment. It felt like a mug of hot chocolate. Short of cutting a hole in the hood and venting out the air from the Radiator / headers; I don't think I could sufficiently vent the engine bay with this stuff on.

It really made me realize that the hood is one large heat sink.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tweakmeister &raquo;</TD></TR><TR><TD CLASS="quote">you wanna send that stuff this way? </TD></TR></TABLE>
Sorry, i have plans for it. Going to make my intake arm / air box look like a nasa product.