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Garage => Interiors & Exteriors => Topic started by: cdw904 on 08 July 2018, 05:10 PM

Title: Hood pad insulation
Post by: cdw904 on 08 July 2018, 05:10 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!

Title: Re: Hood pad insulation
Post by: floyd111 on 08 July 2018, 05:19 PM
and now for the silly question.. How did you get the old adhesive off? Scrape scrape, scrub scrub?
Title: Re: Hood pad insulation
Post by: cdw904 on 08 July 2018, 05:25 PM
Quote from: floyd111 on 08 July 2018, 05:19 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.
Title: Re: Hood pad insulation
Post by: rumb on 08 July 2018, 05:31 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.
Title: Re: Hood pad insulation
Post by: floyd111 on 08 July 2018, 05:48 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.
Title: Re: Hood pad insulation
Post by: Squiggle Dog on 08 July 2018, 09:22 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.
Title: Re: Hood pad insulation
Post by: rumb on 09 July 2018, 09:04 AM
Quote from: floyd111 on 08 July 2018, 05:48 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.

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.
Title: Re: Hood pad insulation
Post by: oversize on 09 July 2018, 06:40 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!
Title: Re: Hood pad insulation
Post by: TJ 450 on 10 July 2018, 01:01 AM
It does make the engine bay look a lot tidier as well.

Tim
Title: Re: Hood pad insulation
Post by: daantjie on 10 July 2018, 12:49 PM
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 ;)
Title: Re: Hood pad insulation
Post by: floyd111 on 10 July 2018, 05:40 PM
anyone tried a layer of Dynamat under the hood, with a new regular hood pad  on top?
Title: Re: Hood pad insulation
Post by: ptashek on 11 July 2018, 01:54 AM
Quote from: floyd111 on 10 July 2018, 05:40 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.
Title: Re: Hood pad insulation
Post by: TJ 450 on 11 July 2018, 03:42 AM
Dynamat will just melt onto the engine, but there is a product they make for the purpose.

Tim
Title: Re: Hood pad insulation
Post by: floyd111 on 11 July 2018, 09:28 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.
Title: Re: Hood pad insulation
Post by: ptashek on 11 July 2018, 11:22 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.
Title: Re: Hood pad insulation
Post by: floyd111 on 11 July 2018, 06:20 PM
That's comforting to hear. Had not worried about deterioration yet, but I have my doubt about it's limits when it comes to damping qualities. (vs closed cell damping materials).
Nobody here feels like the noise from the front could be absorbed a bit better then what these pads have to offer? (in the line of thought to have the 116 be quiet like a Bentley of those days? What ARE the noisiest sources of a well-maintained 116?