hood insulation removal?
Posting Guru
Joined: Aug 2005
Posts: 1,768
Likes: 1
From: Central Alabama
I took my hood blanket/insulation off a couple of years ago when I did my foil delete. My understanding was both are/were for sound dampening purposes. Combined with the open air intake, the turbo whistle was alot more pronounced (which is what I wanted)!
I also removed the rubber hood weather seal up by the windshield wiper cowl, it made sense to me that it would act like a heat extractor. If you pull it off, you'll notice it doubles as a rain track. There is a 2 inch opening in the plastic in the middle, I cut a 4 inch piece off the rubber weather stripping and RTV'ed it in the gap. No water intrusion problems yet! I can feel the heat escaping from that area, so I know its working.
I also removed the rubber hood weather seal up by the windshield wiper cowl, it made sense to me that it would act like a heat extractor. If you pull it off, you'll notice it doubles as a rain track. There is a 2 inch opening in the plastic in the middle, I cut a 4 inch piece off the rubber weather stripping and RTV'ed it in the gap. No water intrusion problems yet! I can feel the heat escaping from that area, so I know its working.
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
good move
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Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
One of the articles in dieselpower mag showed them taking it out, adding more dynomat sound deadening material and then replacing it. I was think about doing this as well. Me personally, I want the thing to be ultra quiet. I have already done the entire cab with sound deadening and it made a huge difference. Now I am thinking about doing the hood as well. The only thing preventing me is I am thinking about going with a heat extractor hood from keystone.
Freshman User
Joined: Jun 2009
Posts: 29
Likes: 0
2004 f250
I was thinking of putting the hood insulation on my 2004 6lt f250 diesel because my 2001 7.3 had one and it cut down on the noise ( wife thing ) , after reading the thread I am not sure if it is the right thing to do, and I do not understand how it drops down if a fire starts, also why did Ford stop installing them on the 6lt, could it be because the 6lt is so different from the 7.3 and it could cause problems. Thanks 
Logistics Pro
Joined: Mar 2002
Posts: 3,881
Likes: 84
From: Wake Forest, NC
No, the were pinching pennies. Job 2 04 trucks started with this. Missing hood liners, missing light bulbs in the glove box and doors, missing fender liners in the bed etc.
I added the hood liner on my 04, I just feel better with it there. There is some speculation that it will help (read HELP) with fire supression, the plastic tabs melt easily and the liner will drop down. But in practice, as pictured above, I don't know how effective it is. Sometimes you might see warning labels on trucks not to remove any of the sound insulation materials as it has to meet certain federal noise restrictions, the 6.0 might have been quiet enough on it's own they were able to delete the hood liner.
It has NOTHING to do with paint protection. Anything hot enough to discolor the paint over time would melt the plastic retainers long before that. Other than fire, i've never seen anything discolor paint on a factory car. I a few rare, very foggy in my brain cases, improperly routed exhaust has, but I don't think i've ever seen it on a hood.
I added the hood liner on my 04, I just feel better with it there. There is some speculation that it will help (read HELP) with fire supression, the plastic tabs melt easily and the liner will drop down. But in practice, as pictured above, I don't know how effective it is. Sometimes you might see warning labels on trucks not to remove any of the sound insulation materials as it has to meet certain federal noise restrictions, the 6.0 might have been quiet enough on it's own they were able to delete the hood liner.
It has NOTHING to do with paint protection. Anything hot enough to discolor the paint over time would melt the plastic retainers long before that. Other than fire, i've never seen anything discolor paint on a factory car. I a few rare, very foggy in my brain cases, improperly routed exhaust has, but I don't think i've ever seen it on a hood.
Senior User
Joined: Jun 2006
Posts: 372
Likes: 0
of course there is that ONE fanatic that removed his... Now it's a paint job with flames included so if there is a fire, it'll just look like it's supposed to be there (snicker-snicker) seriously, it's an awesome place for a cool paint job. (maybe he'll chime in now...) Heck, he's so HOT, he had people gathered around his truck at RiffRaff-West, with TWO thermometers checking his heat!!!
me? I still got the insul on my '03.... guess i'm just not cool
(except for my 7.3 PS SD!!!)
me? I still got the insul on my '03.... guess i'm just not cool
(except for my 7.3 PS SD!!!)
Elder User
Joined: Jun 2006
Posts: 764
Likes: 1
From: Gulfport/Biloxi, MS
I seriously doubt that it has anything to do with fire on an f-250, but YES some vehicles it does. I cant remember any right off that I know for sure use it as a fire suppression, but I know they are out there. The clips that hold it are designed to melt at relatively low temps.
"Hoodliners are meant to serve a number of crucial safety functions. Without an automotive hoodliner, it is very likely the hood of the car would quickly overheat and become warped, or the paint would melt. A good hoodliner keeps the hood cool and can also protect the car's engine from overheating by drawing heat away from the engine and into the core of the hoodliner material. Possibly the most important function, a hoodliner is designed to protect drivers and passengers in the event of an engine fire. When an engine catches fire, a set of bolts underneath the hood are designed to melt quickly, which releases the hoodliner onto the source of the fire. A fire-retardant hoodliner can smother a fire, giving a passenger more time to exit the vehicle."
"Hoodliners are meant to serve a number of crucial safety functions. Without an automotive hoodliner, it is very likely the hood of the car would quickly overheat and become warped, or the paint would melt. A good hoodliner keeps the hood cool and can also protect the car's engine from overheating by drawing heat away from the engine and into the core of the hoodliner material. Possibly the most important function, a hoodliner is designed to protect drivers and passengers in the event of an engine fire. When an engine catches fire, a set of bolts underneath the hood are designed to melt quickly, which releases the hoodliner onto the source of the fire. A fire-retardant hoodliner can smother a fire, giving a passenger more time to exit the vehicle."