hood pad was toast! - Page 2 - PeachParts Mercedes-Benz Forum

CSchmidt · #16 05-10-2002, 11:17 PM

Folks,

I owe an intro, but will do that later... following this thread I just installed a hood pad on an '87 sdl and it made a tremendous difference in noise from the engine. I would guess it cut it in half or less ( I had no liner left). I looked on e-bay for the email address of the folks selling them. I contacted them directly, and they sold it for the lowest price listed ( about $29 + shipping). Don't let the auction jack up the price.

I cleaned the inside of the hood, degreaser, pressure washer, wiped with a solvent ( paint thinner or lacquer thinner). Dried it off real well. Blew it dry with an air gun.

I used 3m "Super Trim Adhesive", part # 08090, - about $15 at a Napa store. It lists hood pads as a usage on the can. It is a contact cement. Spray the liner, spray the hood, do them a couple of times. If you are careful, you will get the recommended 3x coverage. (You won't completely cover the whole surface areas with 1 can - with 3 sprays...so make sure you get the edges real well).

Good luck!

Chuck

Kyle Blackmore · #17 05-10-2002, 11:48 PM

When I first bought my car 2 years ago my pad was just starting to separate and the inner foam was very fragile(must be the same foam on the temp sensor for the ACC).I carefully pulled apart the area that was bad,shot the 3M super inside the gap and braced it tight with some lath till it dried.The edge needed some extra help so I glued it to the hood with auto-goop,so far so good

edge · #18 03-31-2003, 07:38 AM

Chuck, how many cans of 3M do I need for the job? Thanks.

lrg · #19 04-01-2003, 03:28 PM

Edge,
Just finished this job and I used just under 2 cans. I might have been able to get it done with one but I wanted to make sure it stayed up so I sprayed the whole pad instead of just the edges and a few spots in the center. The foam backing on the pad absorbs a fair amount so if you want to cover the whole pad then you'll use more than 1 can. Thanks to all here for your advice about removing the old glue. I used 3M glue and wax remover and it took about 50% of the old adhesive off. The rest was really on tight so I'm pretty confident my new pad will stay up there. With any luck this will be good for another 18 years.

LRG

edge · #20 04-01-2003, 03:56 PM

Hwy not spray the underside of the hood itself and you won't have the absorption problem?

lrg · #21 04-01-2003, 04:00 PM

You need to spray both surfaces. It's a contact cement but it lets you remove and reposition the pad until it cures. Definitely put a tarp or something over the engine when you spray the hood because it drips some and it will get it all over the engine if you don't cover it.

BoostnBenz · #22 04-01-2003, 08:40 PM

The hood pad on the 83 is just starting to seperate, but I glued it up to stop it.

Where as the pad in the 84 is just as bad if not worse than the one in the picture there, just nasty. I thought I read somewhere that if you buy the kind w/o heat shield for the turbo version that the pad won't last near as long.

Stevo · #23 04-02-2003, 09:46 AM

My Euro 240D had never had a hood pad so I installed one and it sounds the same to me. I question the value of a hood pad as a sound damper and am wondering what other benefits they offer, if any.

edge · #24 04-02-2003, 09:55 AM

The seller's argument is that it shields the paint on the hood from the engine heat.

BoostnBenz · #25 04-02-2003, 10:10 PM

I can't imagine that being much of a problem on our diesel motors. But on my talon though, I had my heat sheild off of the manifold for just a couple days and I managed to melt the nylon strap for my car's bra which was at least 6" away. Fortunately it has a nice heat shield on the hood otherwise that may of been the paint too. Anyway, I think it is almost solely for sound deadening.

lrg · #26 04-03-2003, 12:55 AM

That is probably true for non turbos but on the turbo it at least helps protect the hood. On the California 1985 and later cars with a trap catalyst I think you want to spring for the pad with the heat shield. Between the turbo and the trap (both are right on top by the hood) there's a lot of heat being given off.

edge · #27 04-03-2003, 09:25 AM

I'm going to Home Depot to get the 3M adhesive. That's got to be cheaper than NAPA.

CamelotShadow · #28 09-17-2007, 12:22 AM

Quote:

Originally Posted by 84300DT

the stuff crumbled into powder!

That looks like my hood pad

I find chunks of it inthe engine

I vacumned it & had intentions of taking it all off to stop it from crumbling inthe engine
but was told the paint could get damaged from the heat
SO I lef the basically 60 percent thats still up there attached.

Great thread.

Just wondering if that falling hood pad crumbs & dust can foul the engine?

Jeremy5848 · #29 09-17-2007, 12:40 AM

I didn't notice any change in sound levels with my '85 but did notice a small decrease with my '87, probably because the '87 has belly pans that trap the sound and bounce it back up.

I put the pad with the aluminum heat shield on both cars. The '85 is a California version with the high-mounted turbo so I wanted as much protection from the heat as possible. The '87 has had its trap cat replaced so there's less risk.

I used about 1-1/2 cans of the 3M 8090 product on each pad. For the '85, I took the hood off and laid it upside down on padded sawhorses. For the '87, I just put the hood all the way up and covered the engine compartment with a tarp. Both ways worked just fine and both pads are still sticking.

Jeremy

#30 09-17-2007, 01:32 AM

Hood pad? I don't use a stinkin' hood pad!