Hood Insulation Experiences
Mudding
Joined: Feb 2014
Posts: 102
Likes: 2
From: Colorado Springs, CO
Cmon guys, do you think Rover or any other auto manufacturer would spend the money on such a thing if it didn't serve a purpose? The bean counters would have tossed that thing a long time ago.
Every modern vehicle has the insulation under the hood. It serves two important (debatable) purposes, each can decide just how important they are:
a) injector tick -- you'll notice this insulation started appearing as fuel injection became commonplace. Many injectors, especially high-impedance "saturated" type injectors make loud clicks that are quite audible, and in some cases sound like dry lifters. This is the most distracting noise that manufacturers try to hide-- other engine noise is quiet in comparison.
[i.e sound insulation]
b) heat insulation - Underhood temps are far higher in modern vehicles with smaller engine bays, higher coolant temps for emissions. Sure, the engine heat won't peel paint, I think that's pretty obvious. But go park your rover in the southern Arizona sunshine after the engine got good and hot, shut it off and let it have a nice long heat soak. You might not notice anything initially, but try that day in and day out, and let me know how your hood paint holds up. It's simply insurance against the worst.
The "fire blanket" idea has some merit, but it's not the primary reason they fit these. There's no automobile safety standard in effect that says you have to have this-- some materials used in automobile manufacture have to resist flame / temperatures, but that's about it.
Every modern vehicle has the insulation under the hood. It serves two important (debatable) purposes, each can decide just how important they are:
a) injector tick -- you'll notice this insulation started appearing as fuel injection became commonplace. Many injectors, especially high-impedance "saturated" type injectors make loud clicks that are quite audible, and in some cases sound like dry lifters. This is the most distracting noise that manufacturers try to hide-- other engine noise is quiet in comparison.
[i.e sound insulation]
b) heat insulation - Underhood temps are far higher in modern vehicles with smaller engine bays, higher coolant temps for emissions. Sure, the engine heat won't peel paint, I think that's pretty obvious. But go park your rover in the southern Arizona sunshine after the engine got good and hot, shut it off and let it have a nice long heat soak. You might not notice anything initially, but try that day in and day out, and let me know how your hood paint holds up. It's simply insurance against the worst.
The "fire blanket" idea has some merit, but it's not the primary reason they fit these. There's no automobile safety standard in effect that says you have to have this-- some materials used in automobile manufacture have to resist flame / temperatures, but that's about it.
Last edited by QuakerJ; Apr 16, 2014 at 10:45 PM.
Replaced the hood liner today. Used Bonded Logic Insulation and Aluminum Tape, Permatex Heavy Duty Adhesive.
I put it on, cut it out, and got the clips in before spraying. Worked well, but you really have to push it into place. Use books or something heavy to hold it there. Once the adhesive is on she is sticking in place. I will keep pressure on it over night and reinstall tomorrow.Put the aluminum tape around any insulation that was showing.
If there is a sound benefit from this I will know it. It is much thicker and substantial than the OEM material. Hopefully a little quieter, we will see. only negative I can think of is the ice may not melt off my hood in winter.
I put it on, cut it out, and got the clips in before spraying. Worked well, but you really have to push it into place. Use books or something heavy to hold it there. Once the adhesive is on she is sticking in place. I will keep pressure on it over night and reinstall tomorrow.Put the aluminum tape around any insulation that was showing.
If there is a sound benefit from this I will know it. It is much thicker and substantial than the OEM material. Hopefully a little quieter, we will see. only negative I can think of is the ice may not melt off my hood in winter.
Last edited by CollieRover; May 3, 2014 at 01:56 PM.
My ADD got the best of me, and we have company staying the night so hood could not rest on the dining room table all night. Reinstalled, and took her for a drive.
Both my wife and I noticed how quiet it seemed. Sounded like a "luxury vehicle" she said. Imagine that. You can hear the music better and play it a little softer.
Did make a difference, ran the same engine temps as usual. So, in short, glad I did it, and every time I open my hood it will be nice and shiny.
Both my wife and I noticed how quiet it seemed. Sounded like a "luxury vehicle" she said. Imagine that. You can hear the music better and play it a little softer.
Did make a difference, ran the same engine temps as usual. So, in short, glad I did it, and every time I open my hood it will be nice and shiny.
