Cab Noise, DYNAMAT???

[Lsfarm]

everything I can

I have a blanket on the oil pan, valve cover, and on several of the larger accessable areas of the engine block.



The entire engine rings like a bell with the knock/clatter of the injectors and detonation of the cylinders firing. So any amount of noise insulation helps.



These engines are used as stationary engines in generators and in marine applications where there is zero air circulation around the engine, all the cooling is remote, or without a fan of any kind. So don't worry about any lack of cooling, the engines are made to run at max HP levels with no air circulation around the block or pan.



Do a search for 'noise reduction' and you will find lots of photos of various blankets and noise reduction ideas.



Greg L. The Noise Nazi

 

[TomGolden]

I also am planning to eventually do to my valve cover what I did to the oil pan. Only reason I haven't yet, I am still in the process of swapping my OEM valve cover for one of the red Cummins covers with another TDR member who lives 100 miles from me, and we just haven't hooked up yet. And, I am not going to permanently adhere the sound deadener to the Red Cummins cover, so I can show it off when I want to , so a little creativity will be needed to mold a cover that is removable.



I have an engine oil temp gauge, and in the 6 months since I did the oil pan, I have noticed zero temp differences.



Tom

 

[JR2]

Can anyone give me the approximate square footage of the area coverd behind the back seat in a quad cab?? I would like to order some mat of some type and need to know how much I need.



Tom - How many square ft to cover the oil pan??





Thanks



JR2

 

[TomGolden]

JR, I don't recall the exact measurements for either the oil pan or back cab wall, but I'll see if I can guess fairly close for you.



Back cab wall: I seem to remember 30 - 32" height by 60" wide.



Oil pan: I did this in pieces... 17" x 10", and the other 7" x 24" ??



Hopefully I'm close.

 

[krs]

Thanks Tom.

Your oilpan blanketing is fascinating and must have taken considerable time and care to do. It looks good!

I had tried some of the paint-on quieting stuff on the oilpan of our '01 but when done I thought that the improvement was barely worth the trouble. It was difficult to apply by brush overhead and through the axle and crossmember. Your way looks to be more thorough coverage than I could arrange with the paint/goo.



I think that '01-'o2 HO trucks are the noisiest of all, and the St. Louis built ones are the worst of a sorry lot in terms of cab quieting. Both of our other trucks, Mexican built 12 valves, are (were) much quieter out of the box than the '01 and took only back wall dampening to cut the road noise from the rear to make them comfortably quiet.

 

[TomGolden]

KRS -



Actually, it took easily less than an hour total time to do the oil pan. I just crawled underneath, eye-balled it to decide how I would cut the pieces (I believe I did it in 2 pieces, maybe 3... ), took the measurements along the lines I decided to cut the material, then cut out the material.



The asphalt-type sheeing from GSI is self adhesive on one side, so on a nice warm summer day, I stuck that material on the pan first and using my hands I just pressed it on there as hard as I could, and molded it around all the pan curves, bolts, etc. . I let it "stick" for an hour or so, and then using the 3M #77 spray adhesive, I sprayed the glue on the outside surface of the GSI asphalt sheeting, then applied the GSI foam. Getting it wedged up in between the back of the pan and the bellhousing was a bit tricky, but I got enough of it up in there to do the job.



D-oh! I keep forgetting to mention that everywhere, on the seams of the GSI foam, I have been using aluminum A/C duct tape as I think Greg Long or someone else had recommended I do. That is clearly visible in these pictures above.



The safety wire that you can see is more to keep the foam from totally falling off on the ground if it ever does come unglued.



So, actually, doing the oil pan was probably the easiest thing I've done so far in my sound supression project. Didn't have to remove seats, carpeting, door panels,... .