I like the mix of Lucas About 10oz. then 10oz. of the Wally World 2-stroke oil. Quites her down then with more throttle response. I also add a Cetane booster which make even more of a diiference. The name of the Cetane Booster is called Power Stroker. LOL yes it is. Its cost is to cheap for me not to add. I get it local so I'm not sure where you could find it. I guess you can try a Google search.

 

I used an old fuel filter. I poured it through the filter, then stirred it with a strong magnet. I'd repeat the process a couple times. I only used a couple quarts per tank when I burned it. I haven't been doing it for a while because the truck shop keeps giving me a great deal on oil changes, so it's cheaper to let them do it.

Do some research. I have read where these trucks have been run on straight motor oil, vegetable oil, and transmission fluid.

 

The best way to do it is to heat the oil to like 150*. then, pump it through a series of filters and pipes starting with a 20micron, 15,10,5 or however far u wanna do it. Filtering down to 2 makes it pretty clean.

 

I saw on here a while back that someone got a material from Lowes or Home Depot that I believe was a roofing material with an adheasive backing. It was fairly cheap 50 bucks for a roll. Just remove all of your interior and put 2 layers of this down and re install interior.

 

I'll get a pic, for ya! been hunting, it wraps the back fire wall.

 

SMELLY. Roofing material smells. Id rather use Dynamat.

BUT, I doubt Dynamat this will do much for diesel clatter. That's just to stop resonating metal panels. You need mass loaded vinyl etc for noise blocking. The up-pipes and headers are the main source of noise.

I need to quiet the area behind the up-pipes...according to you the 2003 F350s appear to have this material added in that area.

 

The door seal mod helps out a lot for reducing noise in the cabin: https://www.ford-trucks.com/forums/9...mod-video.html

I was also getting a lot of engine noise coming through the firewall where the steering column goes through the it. At idle I put a towel around the steering column at the firewall and could tell a big difference in engine noise. I coated the plastic with some Vaseline and sprayed with some flexible foam insulation. The Vaseline keeps the foam from sticking to the steering column.

 

Another easy thing to try is the "snowman mod" which involves cutting a foam beer koozie and fitting it around the steering column against the interior firewall. A good amount of noise is transmitted through this location and the koozie will dampen it. The noise transmission can be verified by blocking this spot with your hands while the engine is running and listening for the change.

edit: Grant hit on it while I was typing!

 

Yes that door seal mod is great idea. Where can one buy the tubing? Home Depot? Lowes?

Thanks for the tip on the steering column!

The folks at ADVANCED THERMAL PRODUCTS, INC are sending me a sample of their fireproof sound blanket. Will keep you guys posted and share some pics.

 

I used caulk saver or some call it backer rod. It's a foam rod that can be found at home depot or lowes. This thread also talks about the door seal mod: https://www.ford-trucks.com/forums/1...-seal-mod.html

 

Here is tubing like what was used in the video: Amazon.com: 50 Feet Black Rubber Latex Tubing 3/8"OD 1/4"ID (#804R): Health & Personal Care

 

Thanks Mr. Could it be part 017B54 ?

http://i649.photobucket.com/albums/u...rschematic.jpg

According to my buddy in parts at Ford dealer, the only difference in sound deadening between 2003 f350s and previous f350 models are parts 16738 and 020A42 under the hood:

http://i649.photobucket.com/albums/u...nschematic.jpg

 

That's it, my truck has both.

 

I got a 13x13 inch sample of quiet rap thermal blanket from Advanced Thermal Products today. Weighs just under 2 pounds. Its very dense, heavy duty, bendable.

I dont know the cost yet but am gonna see how many square feet is required to make a blanket which would cover the rear engine, top of tranny and top of engine, without crushing any electrical connectors.

I will get under the truck while its running and push the sample up against the up-pipes to see if I notice any muffling (for whatever thats worth)...I will keep you posted.

Here are some pics of the sample:

 

good info
saving this one