Author Topic: Hood pad insulation  (Read 1220 times)

cdw904

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    • 1980 450SEL 6.9 w/ 57K original miles | Champagne Metallic / Tobacco Brown | Native to Dallas Car
Hood pad insulation
« on: 08 July 2018, 03:10 PM »
Replaced the hood pad today. Removing the old adhesive was the tough part.

Not too bad of a job when you disconnect the spring arms and hoist the hood into a nearly vertical position. Makes application a lot easier.

The 3M yellow spray adhesive works well too. Pics posted

Looks much better!

1980 450SEL 6.9 w/ 57K (current) 
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1985 380SL w/ 66K (current)
2006 E320 CDI w/ 77K (current - daily driver)
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1984 300D (sold)
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floyd111

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Re: Hood pad insulation
« Reply #1 on: 08 July 2018, 03:19 PM »
and now for the silly question.. How did you get the old adhesive off? Scrape scrape, scrub scrub?

cdw904

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    • 1980 450SEL 6.9 w/ 57K original miles | Champagne Metallic / Tobacco Brown | Native to Dallas Car
Re: Hood pad insulation
« Reply #2 on: 08 July 2018, 03:25 PM »
and now for the silly question.. How did you get the old adhesive off? Scrape scrape, scrub scrub?

Exactly :-)  Lots of careful scraping and scrubbing. An old blanket over the engine bay helped a lot with avoiding a mess.
1980 450SEL 6.9 w/ 57K (current) 
https://tinyurl.com/6point9side
https://tinyurl.com/6point9
1985 380SL w/ 66K (current)
2006 E320 CDI w/ 77K (current - daily driver)
1995 E300 Diesel (sold - miss her - one of my favorites)
1984 300D (sold)
1986 300SDL

rumb

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Re: Hood pad insulation
« Reply #3 on: 08 July 2018, 03:31 PM »
3m adhesive remover. takes several can.  you spray on and let sit and it sort of turns the old glue into a crumbly mess with a lot of rubbing with good shop paper towels.   still a lot of work, but will get you down to painted surface.  That assumes the PO didnt use some horrible caulking or something.
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

floyd111

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Re: Hood pad insulation
« Reply #4 on: 08 July 2018, 03:48 PM »
and that works? Wow, my workshop had 3 guys scrub, scrape and sand the floor-glue of my chassis manually, for weeks. Good to know. That's another 2 weeks of wasted work I will not be paying him for.

Squiggle Dog

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Re: Hood pad insulation
« Reply #5 on: 08 July 2018, 07:22 PM »
I bet spraying/wiping on liberal applications of Goof Off would also work. It's worked well for me for removing hardened adhesive remnants. Add time and a plastic scraper, and you're good to go. I'd like to get a good hood pad one day. I had a decent used one, but it got dried up in the weather and damaged during the move.
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rumb

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Re: Hood pad insulation
« Reply #6 on: 09 July 2018, 07:04 AM »
and that works? Wow, my workshop had 3 guys scrub, scrape and sand the floor-glue of my chassis manually, for weeks. Good to know. That's another 2 weeks of wasted work I will not be paying him for.

all bets are off if PO used floor glue or caulking instead of spray adhesive.  my car has 1/2" think caulking glue used on it. I'm planning on sandblasting it off later.
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

oversize

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Re: Hood pad insulation
« Reply #7 on: 09 July 2018, 04:40 PM »
Honestly why bother? The genuine stuff doesn’t last & makes a horrible mess. And the only thing it does is reduce noise.

Strip it off & repaint, or find a newer and better alternative. Unless of course you’re worried about the originality police!
1979 6.9 #5541 (Red Bull)
1978 6.9 #4248 (Skye)
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TJ 450

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Re: Hood pad insulation
« Reply #8 on: 09 July 2018, 11:01 PM »
It does make the engine bay look a lot tidier as well.

Tim
1976 450SEL 6.9 1432
1969 300SEL 6.3 1394
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daantjie

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Re: Hood pad insulation
« Reply #9 on: 10 July 2018, 10:49 AM »
One tip I can give is to spray both the hood pad and the hood itself with glue and to let it sit to get tacky (ambient temp dependent) before you stick it down.  3M Super Trim adhesive is the real deal for this jobby ;)
Daniel
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floyd111

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Re: Hood pad insulation
« Reply #10 on: 10 July 2018, 03:40 PM »
anyone tried a layer of Dynamat under the hood, with a new regular hood pad  on top?

ptashek

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Re: Hood pad insulation
« Reply #11 on: 10 July 2018, 11:54 PM »
anyone tried a layer of Dynamat under the hood, with a new regular hood pad  on top?

Why add unnecessary weight where it makes no sense? The pad already shifts the resonance frequency of the hood panel.
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TJ 450

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Re: Hood pad insulation
« Reply #12 on: 11 July 2018, 01:42 AM »
Dynamat will just melt onto the engine, but there is a product they make for the purpose.

Tim
1976 450SEL 6.9 1432
1969 300SEL 6.3 1394
2003 ML500

floyd111

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Re: Hood pad insulation
« Reply #13 on: 11 July 2018, 07:28 AM »
important indeed.
I thought of Dynamat coz I wasn't impressed by the quality of the foam that Febi or (Meyle) that arrived here. Very close to low density PU, which is not very noble foam. If it is actually a latex variation, it is a very low density latex. I haven't done a reality check on an actual car, but if that cheap stuff has any effect, it can't be great, and I'd imagine miracle effects if there's a material some Dynamat-variation that doesn't melt. I'll say it again.. that stuff is amazing,haha! Makes my crap CRV drive like a BMW, every day of the week.

ptashek

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Re: Hood pad insulation
« Reply #14 on: 11 July 2018, 09:22 AM »
Stan, I've a FEBI pad on my car and it's still perfect two years later, having survived a couple 18h+ almost non-stop journeys.

There is no trace of deterioration due to age or temperature. I'd recommend one any day.
1993 "Pearl Blue" W124 280TE
1979 "Icon Gold" W116 450SE (history, resto)