Hood pad glue - PeachParts Mercedes-Benz Forum

62bhp · #1 07-10-2006, 05:56 AM

Alittle bit ago I purchased a hood pad for my 240d and used 3m's spray on epoxy to glue it onto the hood since my other had completly burned away. However, over the course of two months the glue has failed and my hoodpad has completly come off leaving a mess on my hood. I am curious as to what glue you guys use to keep yours on. I need somthing strong that will last up to at least 20 degrees F. because i plan to make trips to the serria's. My mechanic recommended gorilla glue but it only has a tempature range of 40-140 i really dont want it to come off again.
Thanks,
Mike

stock · #2 07-10-2006, 06:18 AM

Did you follow the directions with the 3m product? If you do a search with "hood pad" in it you will get dozens of hits from this already discussed and most have used the 3m product with positive results.

bill murrow · #3 07-10-2006, 07:09 AM

You most likely didn't clean the hood before you put it on or the hood wasn't cleaned off well enough. All the grease has to come off for positive results.

Cheers,

Bill

Pete Burton · #4 07-10-2006, 09:00 AM

Quote:

Originally Posted by bill murrow

You most likely didn't clean the hood before you put it on or the hood wasn't cleaned off well enough. All the grease has to come off for positive results.

Cheers,

Bill

What Bill said, and then use 3M 8090. Done.

#5 07-10-2006, 09:04 AM

I agree, clean the hood well, put 3 coats of 3M 8090 on both the hood and pad (used entire can), wait 10 minutes, put it in place. mine's be good for several weeks and about 4000 miles, so far. No sign of it coming loose.

hockeynut · #6 07-10-2006, 10:41 AM

Did my hood pad this spring. Based on everything I read that I could get my hands on it's definitly 3M 8090 spray - nothing else. I used one can, followed directions - spray both the underside of the hood (cleaned hood) and the top of the pad, wait 10 minutes or so and stick. I also followed something I read for the install.... prop up the pad in place and do 1/2 at a time. If you try the whole thing and do not have it in place your odds are low that you will get it aligned correctly the first time (and the first time is all you get with that adhesive

) My pad has not budged.

Hit Man X · #7 07-10-2006, 10:55 AM

The pad have significant difference in sound reduction?

jbach36 · #8 07-10-2006, 10:56 AM

I replaced my hood pad a few months ago, went to Napa. They sold me 3M Yellow for about $6.50. Later went to Auto Zone for something else, compared prices. They had a generic brand (I forget the brand, but in a red box) for $2.69 or something. I used it, and it worked just fine. It's basically a gasket sealer. Take as much of the old stuff off as you can get, don't knock yourself out, all you need are some clear places where you can "draw" this stuff on. You don't have to smear it on, just squeeze the tube and go. Once that's on, start with your pad from left to right as you go.

Jeremy5848 · #9 07-10-2006, 11:27 AM

Quote:

Originally Posted by Hit Man X

The pad have significant difference in sound reduction?

I noticed no reduction in ambient noise, either standing outside the vehicle or sitting inside it, not moving, engine at idle. It does keep the hood much cooler, of course, except for the heat it picks up from being out in the sun. Others have said on this forum that the purpose of the pad, at least in part, is to keep engine heat from damaging the paint, especially in the area of the turbo [if any], especially on the 1985 300D California models, where the turbo sits high over the trap oxidizer.

Since I have that model, I was particularly interested in replacing my pad, and it does have the desired effect. The better after-market pads have a reflective aluminum thing directly over the turbo area. It works.

I used 3M 8090 after cleaning the hood with solvent (to get off the old stickum and oil) and 409 cleaner (to remove dirt and soot). I took the hood off and laid it upside-down to make it easier to work on. There are pictures on the forum here somewhere. Try this link:

Hood Pad Replacement (pics)

My pictures are in post #14.

Jeremy

Hit Man X · #10 07-10-2006, 11:33 AM

Hrm, well makes sense for the paint and heck, it looks a ton better with one also!

TheDon · #11 07-10-2006, 11:42 AM

yea im going to need a hood pad.. the paint on my hood is starting to look bad.. all those years of no pad..

my123ca · #12 07-10-2006, 08:08 PM

I used PVC Pipe Glue. I used 2 pieces of plywood for both sides to press the mat to the hood. Use a 2x2 under the plywood and partly close the hood. Stick the 2x2 under engine compartment. This will put a little bit of pressure to the pad.

62bhp · #13 07-10-2006, 08:14 PM

There was no dirt or dust on the hood because it was just repainted but i used no where near a full can and that was probally my problem.
Thanks,
Mike

bill murrow · #14 07-10-2006, 08:18 PM

They painted under the hood? Thats quite a thorough painter.....

Could it be possible that the surface was too glossy to hold the pad?

Maybe a little roughing up with liquid sandpaper or some emory? What do you guys think? It should've been clean enough....

Cheers,

Bill

mplafleur · #15 07-10-2006, 10:15 PM

I did mine about two weeks ago. Couldn't find the 3M at the auto parts so I bought two cans of some heavy dutycontact spray by Permatex (also at the auto parts store).

I degreased, scraped, and power washed the underside of the hood. Then I sprayed both the pad and the hood about 4 times each, alternating directions horizontally and vertically. I let sit about 10 minutes (maybe closer to 5, as it was starting to rain), then stuck it to the hood, and I mean STUCK. It doesn't want to come off. I tucked the edges under the lip of the hood and used a carpet J-roller to press it all to the hood. I ended up using a little bit more than one 16 oz. can.

Been good so far.