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  #16  
Old 10-16-2008, 10:52 PM
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Quote:
Originally Posted by cphilip View Post
and used the 3M spray adhesive (one large can) and its been on almost 10 months and perfect. Clean good and scuff good and spray on and roll on good... and its on there. Nice pad...
Thats the ticket, but you folks might consider getting the Hi-temp 3M spray contact adhesive.

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  #17  
Old 10-17-2008, 12:21 PM
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I can't recall the exact product number, but right on the can is says for Hood Blankets (among other things). It was often recommended here for this purpose and it works. I think it can be found in some related post search.
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  #18  
Old 10-17-2008, 01:32 PM
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The 3M product is "Super Trim Adhesive #08090" and it works great (one can was plenty). I couldn't find it at the Auto Parts stores, but bought it from West Marine.

One thing I'd stress, were I to do this again, is the recommendation to have a helper when you put it on. I didn't, and despite being very careful and the alignment is far from perfect.
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  #19  
Old 10-17-2008, 03:51 PM
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write up on hood replacement i did...

Hood Pad Replacement (pics)
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  #20  
Old 10-18-2008, 11:36 PM
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Quote:
Originally Posted by compress ignite View Post
Someone in Germany "Put It On" the Hood in March of 1990.
(And after ONLY 18 years it looks like...crap)

A nice weekend project,whenever I can fit it in.
Mine was installed in March of '90 as well...what's your chassis number?

Mine's actually in decent shape. Is it heat/mileage that makes them go bad?
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  #21  
Old 10-19-2008, 03:20 AM
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Hood Pad

2.5turbo,

3624

It's the heat...Kills the heck out of the foam...I've seen newer hood pads on
much newer MBs that are the "fiberboard" type ...I'm so envious.

I notice you're in the Northern Tier of states that is probably why yours looks good.

Mine has spent most of it's life in Fla,Ga and SC (Summers are Brutal) and the
paint code is 040 (Schwarz) "Clap of Doom" Black.The skin temps on the body
in August,in direct sunlight with a infra-thermometer push 170F.
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  #22  
Old 10-19-2008, 03:33 AM
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The hood pad is for blocking noise, not heat.
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  #23  
Old 10-19-2008, 07:03 AM
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Quote:
Originally Posted by ForcedInduction View Post
The hood pad is for blocking noise, not heat.
how do you figure?
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  #24  
Old 10-19-2008, 07:19 AM
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I, personally think that both reasons for the "Hood Pad" are correct.....

Blocks Noise......definitely......My 300D is way quieter with the Hood Pad

Insulation..... heat from Engine will deteriorate hood paint, and all diesels run more thermally efficient in warmer engine compartments.....

SB
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  #25  
Old 10-19-2008, 08:23 AM
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Quote:
Originally Posted by Shorebilly View Post
I, personally think that both reasons for the "Hood Pad" are correct.....

Blocks Noise......definitely......My 300D is way quieter with the Hood Pad

Insulation..... heat from Engine will deteriorate hood paint, and all diesels run more thermally efficient in warmer engine compartments.....

SB
Likewise, My brother in law had an old Buick LeSabre diesel. It was missing the hood pad and the paint had tiny cracks all over. The rest of the paint was beautiful.
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  #26  
Old 10-19-2008, 08:24 AM
ForcedInduction
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Originally Posted by vwbuge View Post
how do you figure?
The "cheap" models did not have it. 200, 200D, 220D, some 230s and some 240Ds.

With the exception of the EVIL TrapOx equipped models, the engines don't dump enough heat near the hood to affect the paint. I've been without a pad for two years with zero effect on the paint.

Quote:
Likewise, My brother in law had an old Buick LeSabre diesel.
Thats not even close to a comparison. The Buick had a much larger engine, was FWD, the hood was much closer to the engine and it had much cheaper paint.
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  #27  
Old 10-19-2008, 09:45 AM
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I guess this is a matter of opinion or car model.
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  #28  
Old 10-19-2008, 10:51 AM
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Quote:
Originally Posted by ForcedInduction View Post
The "cheap" models did not have it. 200, 200D, 220D, some 230s and some 240Ds.

With the exception of the EVIL TrapOx equipped models, the engines don't dump enough heat near the hood to affect the paint. I've been without a pad for two years with zero effect on the paint.


Thats not even close to a comparison. The Buick had a much larger engine, was FWD, the hood was much closer to the engine and it had much cheaper paint.
I don't know that that is entirely true. Its a turbo/non turbo issue I believe. I have seen plenty of cars at the lot with pealing paint around the turbo area on the hood. I think it served both features. Certainly worth 10-20 DB of sound dampening.
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  #29  
Old 10-19-2008, 06:44 PM
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The hood pad without the aforementioned heat shield is for all W123's except the turbo models with trap oxidizer. The turbo sits much higher up the engine, necessitating the need for the extra insulation. In the 1983 brochure a new 300SD was being given its engine, and on the hood was the typical hood pad without any extra insulation on the turbo area. My car also originally had the waffle type pad, without the extra insulation portion since mine is a 1983 300D without the trap ox.



So I installed a standard pad without the extra insulation. However, I do realized that this one is closer to the waffle weave design the original one was. The pads that had the extra insulation spot, felt different and somewhat thinner, since our old '81 300TD had one that was crumbling down probably because of poor adhesive application.
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  #30  
Old 11-18-2008, 04:05 PM
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http://www.dieselbenz.info/quiet_hood.htm

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