I trashed mine. It was covered in oil and thought it turned itself into a fire hazard.

 

Well I am considering the same as mine is well utter garbage, but I figure it there for a reason, to protect the paint...but I suspect our hoods are more spacious then more cars?? I am thinking its just going to fall off now, with assistance from me of course...

 

I would just replace the pad with a self adhesive sound proofing material.
Dynamat, FatMat etc.

 

Never had an IDM code. SC doesn't require any SMOG or vehicle inspections though. I also check it on Auto Enginuity every few weeks for hidden codes and never seen one.

 

Haven't seen any side effects of removing it. Been off there for about 5 years. I originally planned on putting a dynamat or similar product on but just have never gotten to it.

 

ok its considered done, I will be removing it asap as soon as daylight comes and its a nice 70* out...

 

My heat shield looks like it survived a hurricane. I've been wondering what to do about it as well.

 

Back in the early 2000's, it was considered a "mod" to delete the hood insulation. You'd see it in the signatures of members on the old FordDiesel.com forum. It was one of those things where one guy did it, posted a photo of it, and made some seat of the pants claim about how much better his engine ran without it, and by the end of the week, a dozen more guys deleted and tweeted (before Twitter existed) about it on their signatures.

The more people did it, the more people did it. Claims from increases in power and fuel economy, to decreases in oil and exhaust gas temperatures all followed on as justifications for this "mod". And the irony was, all of this was happening even as Ford was increasing the thickness of the insulator in response to noise complaints from early Excursion owners with diesels.

By model year 2003, according to a former Ford NVH engineer, an entire kitchen sink of insulators were added to the engine compartment of the 7.3L, including fender fillers, a secondary insulator that mounted on the AC accumulator, a tertiary insulator that surrounded the passenger side battery, additional wheel well insulators (rubber flaps), rectangular foam pieces at the base of the A pillars, a transmission tunnel insulator, two under dash insulators (in addition to a thicker firewall insulator)... a constellation of add ons to attenuate the 7.3L engine noise which was now no longer the quietest in the light truck market.

Before 2001, the clattering Cummins 5.9 was the only viable light truck diesel competitor to beat in terms of NVH, which the 7.3L could easily do without any insulator... without even the hood itself. Now that the new Duramax was rolling off the GM lots in droves, quieter by design, and complimented with hood to fender seals, Ford committed a few bucks to tame the 7.3L clatter. But by 2004, with fuel prices on the rise, a new war in oil land, a new quieter 6.0L in place, and full size truck sales falling, all the extra insulation went away.

 

well as for claims about better EGT or what ever, I am not concerned with I jkust wanted to get the oil soaked thing away from the heat (or what ever it was soaked with from its past life) and who knows I may add new one down the road if I deem that the noise needs quieting down, but I really dont mind the 7.3 "clatter"...

 

Have thought about something like this. Nice job


Subscribing for long term reports as LED specs tend to show that they are not known for heat tolerance and why I have held-back.



So *that* explains why I have what looks like a plastic garbage bag stuffed with insulation inside of my fender.

 

Yes... heat is the bane of LED lighting. Looking at the back of the LED donut - that's a heat sink. The brighter the lumens with a smaller package, the more the heat is a factor. Look at what they do with LED headlight bulbs:

This one has a fan in the base...





Here's taking a heat sink to new limits...

 

YES! That was one of many subtle additions to the Super Duty that were incremented in place between model years 2000 and 2003. The garbage bag is actually perforated with tiny holes that breathe. Ford installed similar noise insulation in certain Lincolns, dating all the way back to the mid eighties Mark 7.

 

Mines got the first layer of covering hanging down like a torn 1980 GM headliner.

I know in some cars, the pad is needed to keep the hood paint from baking off. Maybe just pulling the liner and hitting it with a coat of bedliner to encapsulate it would work? Might even work better since the sound would be reflected off the hard surface and sent back to bounce around the engine bay.

 

We want just the opposite! We want the hood liner to be porous, so that the sound waves ENTER the matting, and their energy becomes diffused inside of the mat. You don't want the sound bouncing off a hard surface... that will just echo the sound. Reflecting the energy is the same as repeating the energy, only with less force. Just like a mirror reflects light, a hard surface reflects sound. To reduce sound, we want soft, porous mats that absorb energy, not reflect it.

 

Oh, Really?


What wavelength is the engine noise you're trying to absorb?