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  #1  
Old 03-14-2013, 06:04 PM
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What cars have good hood insulation pads (for noise reduction)?

I'm trying to reduce noise in our Corolla, and someone suggested stealing a Lexus hood pad. What other cars have good hood pads? Buicks?

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Old 03-14-2013, 06:06 PM
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Quote:
Originally Posted by Jooseppi Luna View Post
I'm trying to reduce noise in our Corolla, and someone suggested stealing a Lexus hood pad. What other cars have good hood pads? Buicks?
...of course, I don't literally mean stealing...
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1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."
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  #3  
Old 03-14-2013, 06:09 PM
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To be honest it is a Corolla... Not the most quite and insulated kind of car in the world and I do not see any solutions except to use Lexus parts. If you can add more Lexus parts to it without breaking the bank then go for it. I rode in the LS460 before and it is very quite. One thing I actually like about Lexus is the quiteness. Buick and Cadillac tend to be a very quite car as well. Of course Mercedes and BMW as well.
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  #4  
Old 03-14-2013, 10:12 PM
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mcmaster carr has the quilted foam - someone on this board used it on his 240D and got some really good results.

You can also try to find some foam that can stick to the underside of the plastic engine cover - it really makes a difference, I know this as I have driven a Land Rover Discovery 300 TDI and that had a 2 inch thick foam pad on the engine to suppress noise. Removing that made it loud.

Infact Im also looking for a similar foam for the OM606 engine cover - it will dampen the already low sounding injection nozzles.

for a cheapie solution - look for a VW Golf mk2 diesel in the yards - it had a really hefty insulator pad on the hood which was held in by leaf spring clips about a foot long each. Its a really really good item.
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Old 03-14-2013, 10:48 PM
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i think pretty much anything diesel is gonna have a good hood pad.go scrounge the junkyards.also the 80's up thru the 90's chevy pickups used a real thick insulation on the firewall.it was like compressed insulation with a rubber coating on the outside it was about 3/4 to an inch thick.look at those also.
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Old 03-14-2013, 11:41 PM
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I use elephant maxi pads for sound proofing on my Mountaineer.
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  #7  
Old 03-14-2013, 11:50 PM
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Quote:
Originally Posted by The Clk Man View Post
I use elephant maxi pads for sound proofing on my Mountaineer.
I'm using one big adult diaper on my 6-horse Craftsman 20". Beat that.
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1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."
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Old 03-15-2013, 09:04 AM
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The brand "Dynamat" makes an underhood product - IIRC it stick to the underside of the hood using some kind of adhesive - I'd try it if I could get a *very clean* hood-bottom.

I'd consider that first - not sure where the cost comes in, but since you are going to be either glueing and/or cutting somethign to fit anyway...


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Old 03-15-2013, 10:01 AM
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Quote:
Originally Posted by Angel View Post
The brand "Dynamat" makes an underhood product - IIRC it stick to the underside of the hood using some kind of adhesive - I'd try it if I could get a *very clean* hood-bottom.

I'd consider that first - not sure where the cost comes in, but since you are going to be either glueing and/or cutting somethign to fit anyway...


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Clean the underside of the hood with acetone. Just don't get it on anything you want to keep a nice paint finish on.
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Old 03-15-2013, 05:51 PM
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I know the early 2000 Corollas have a very unpleasant sound at a certain RPM, almost like like a 617's drone when you remove the exhaust. I have a feeling it is a design of the exhaust system, not lack of hood insulation.
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Old 03-15-2013, 06:06 PM
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Originally Posted by Ara T. View Post
I know the early 2000 Corollas have a very unpleasant sound at a certain RPM, almost like like a 617's drone when you remove the exhaust. I have a feeling it is a design of the exhaust system, not lack of hood insulation.
Ours is a 2004 (2003-2008 generation), so I don't know if that still applies... anyway, the insulation on both the hood & firewall is very thin (at most a 1/4 thick), so I assume that upgrading that would help. Anyway, I'm also thinking of sound-insulating the whole interior, so I'll see how much that alone helps.

That exhaust tidbit is interesting, though.
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1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."
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  #12  
Old 03-15-2013, 06:18 PM
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Volvo 240 Hood Insulation

Post 1986 volvo 240's had a factory insulation pad built in and considering the size of the 240 hood vs the toyo hood you should be able to cut it down to fit.

If you look in any auto parts store they have the flat head (quarter coin size) push in plugs (they kind with the fins in teh shaft) that shoudl fit the available holes in the toyo hood frame (or just drill your own).

Another idea is to get the silver backed high temp insulation that is used to wrap stove hood vents . It is aceramic spun insulation that works for heat as well as sound. It won't collect/hold water/moisture either and won't promote mold growth.
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  #13  
Old 03-15-2013, 08:10 PM
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Quote:
Originally Posted by Jooseppi Luna View Post
I'm using one big adult diaper on my 6-horse Craftsman 20". Beat that.
Well I use to heat up the hood on my Volvo with a torch and then threw marsh mellows on the underside for sound proofing.
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  #14  
Old 03-15-2013, 08:11 PM
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Originally Posted by The Clk Man View Post
Well I use to heat up the hood on my Volvo with a torch and then threw marsh mellows on the underside for sound proofing.
Skip the torch, just run it without coolant. Much safer that way. It even has an automatic shutoff feature when it gets hot enough, and your engine will never make too much noise again.
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1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."
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  #15  
Old 03-15-2013, 09:01 PM
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Quote:
Originally Posted by Jooseppi Luna View Post
Skip the torch, just run it without coolant. Much safer that way. It even has an automatic shutoff feature when it gets hot enough, and your engine will never make too much noise again.
Engine sequester?

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