Dynamat Hood Insulation Install

Lucas

Well-known member
Sep 9, 2004
331
0
Massachusetts
I installed this today. Was an easy job. It adds some weight to the hood and makes a nice solid sound when you close the hood. I can't comment on the engine noise yet, still working on the A/C system, but that should be sorted out next weekend. Here is what you need to buy.

Dynamat Xtreme Tri-Pack # 20445 ( got it at Amazon.com for $55.33 w/free shipping)
Dynamat Hoodliner # 11905 ( got it at Amazon.com for $43.03 w/free shipping )

The tri-pak has 3pcs of 18"x32" sound deadener material. You will use all three with alittle left over. The only tools you need are a razor knife, scissors and a Dynamat roller ( you get that at Amazon too ) I already had a roller from a wallpaper project. You have to remove the hood. No other way to do it. Make sure the surface of the hood is absolutely clean. I used Meguiar's Gold Class Bug & Tar remover to get rid of the grease and grime then washed it a few times with car wash soap. I then waxed the perimeter since the hood was nice and clean and now easy to get at. Do not wax any area that the Dynamat material will be adhered to.
When you have it clean and dry you can start trimming the Dynamat Xtreme material. I found it easier to hold the material against the hood and rub your thumb along the edges of the hood support frame. This makes a mark on the backing paper and you can use scissors to rough cut the shape. When you have the shape that fits just peel back the paper and start at one end using the roller and press out the air bubbles. Keep peeling the paper until you have the material pressed in place. If you get an air bubble in the middle just make a cut and roll it out.
Installing the HoodLiner is easy. The only trimming you need to make is on the top corners. I decided to install mine closer to the front so I need to trim the corners to fit. If you don't mind seeing some of the Xtreme material up front then you don't need to trim a thing. I do wish that Dynamat made the kit 34"x54". Then it would be a perfect fit. But it looks good anyway. I did something different on my install. I reused 4 of the original fasteners from the old insulation. May be overkill, I think it looks good though.
You will be surprised at how this insulation makes your hood sound soild. I'm happy with the install. Time will tell how well it stands up.

By the way, I happen to have 2 boxes of Dynamat Xtreme Tri-Pack # 20445 for sale. They are unopened and brand new. $40.00 each plus shipping and I will donate 25% of each sale to DWEB.
 

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craig

Well-known member
Oct 1, 2004
1,747
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Edmonds, WA
overlandnavigator.com
Looks good. Might quiet things down too. Hmmm....


Make sure the hose clamp points down (circled in red in attachment), or you are going to puncture the dynamat. For that matter, you can dent your hood up if it isn't pointed down. There isn't much clearance on that hood.

Does it close ok without touching anything?

--Craig
 

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Lucas

Well-known member
Sep 9, 2004
331
0
Massachusetts
Discoinjapan said:
Good info and write up.

Thank You. I think it's a good option to the original insulation. May even hold up better during a water crossing. I'll have to check that out sometime.
 

Lucas

Well-known member
Sep 9, 2004
331
0
Massachusetts
Owen Birch said:
did you do the hood blackout while it was off also?

Yes. I installed it about a month after I removed the insulation and that was 12 months ago. Got it from Vigg Designs. It was the 3M brand decal. Still looks good.
 

Lucas

Well-known member
Sep 9, 2004
331
0
Massachusetts
craig said:
Looks good. Might quiet things down too. Hmmm....


Make sure the hose clamp points down (circled in red in attachment), or you are going to puncture the dynamat. For that matter, you can dent your hood up if it isn't pointed down. There isn't much clearance on that hood.

Does it close ok without touching anything?

--Craig

Hose clamp? Maybe you meant to circle the plenum hose connection clamp. The circle you have on the picture is around the cruise control actuator and throttle linkage. The plenum clamp is out of the way on the side of the plenum connection. You are right, there isn't much clearance between the engine and the hood. The hoodliner is 3/4" thick and it wasn't touching anything yesterday. Now that it's settled overnight I'll check later today if the rain stops.
 

Lucas

Well-known member
Sep 9, 2004
331
0
Massachusetts
Ruppsrover said:
Did you look into getting an OEM replacement insulation? I've been searching a little bit with no luck.

That's the first thing I looked for. After talking to Steve at DAP he found that there were none available from their England source. That was a bad sign. He also saw that the usual part numbers were shown as discontinued. Another bad sign. I could have called and e-mailed around and maybe come up with one in stock somewhere but why bother. Since the original would need to be shipped common carrier because of the size I probably would have paid more than the Dynamat solution, so I took Steve's advice and did that. It arrived in 3 days and no freight.
 

Lucas

Well-known member
Sep 9, 2004
331
0
Massachusetts
Lucas said:
Hose clamp? Maybe you meant to circle the plenum hose connection clamp. The circle you have on the picture is around the cruise control actuator and throttle linkage. The plenum clamp is out of the way on the side of the plenum connection. You are right, there isn't much clearance between the engine and the hood. The hoodliner is 3/4" thick and it wasn't touching anything yesterday. Now that it's settled overnight I'll check later today if the rain stops.


I just checked it. No clearance problems. Not even close to anything under the hood. :victory:
 

craig

Well-known member
Oct 1, 2004
1,747
0
Edmonds, WA
overlandnavigator.com
Lucas said:
Hose clamp? Maybe you meant to circle the plenum hose connection clamp. The circle you have on the picture is around the cruise control actuator and throttle linkage. The plenum clamp is out of the way on the side of the plenum connection. You are right, there isn't much clearance between the engine and the hood. The hoodliner is 3/4" thick and it wasn't touching anything yesterday. Now that it's settled overnight I'll check later today if the rain stops.

Whoops, I did a bad job w/ the paint program. :) This one should be a little better (the little circle).

I only mention it because mine put a dent in my hood, and prior to that it chewed up my hood liner. I'd hate to see the same thing happen to yours since it looks so good.

--C
 

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craig

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Oct 1, 2004
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Edmonds, WA
overlandnavigator.com
Lucas said:
I just checked it. No clearance problems. Not even close to anything under the hood. :victory:

Cool. Is this a D1 or a D2 (Guessing D1 from the Lucas avatar). My problem was on my D2, I know a couple of other people have had the same problem.

--Craig
 

Lucas

Well-known member
Sep 9, 2004
331
0
Massachusetts
craig said:
Cool. Is this a D1 or a D2 (Guessing D1 from the Lucas avatar). My problem was on my D2, I know a couple of other people have had the same problem.

--Craig

1994 D1

Lucas avatar started with my 1963 Triumph TR4 a few years back. A project I'm still working on.
 

alex

Well-known member
Apr 29, 2004
2,310
0
Libertyville, IL
Man, your engine is going to melt. It gets hot under there with no insulation, hotter still with the stock insulation. You put something way more efficient in there. Good luck. I hope the reduced noise is worth it.
 

Lucas

Well-known member
Sep 9, 2004
331
0
Massachusetts
alex said:
Man, your engine is going to melt. It gets hot under there with no insulation, hotter still with the stock insulation. You put something way more efficient in there. Good luck. I hope the reduced noise is worth it.


Doubt it. :rolleyes: That's what the fan & radiator is for. Besides, if the engine put out that much heat when turned off then my paint would have cooked without insulation.