Noise Control Continues

With Summer tour dates heating up, and our favorite festivals appearing to be taking the Summer off, I was lacking an out-of-town overnight show to really kick this effort into high gear. Well... Phil Lesh and Friends have announced Pacific NorthWest tour dates, hitting 2 of my all-time favorite outdoor venues: the Cuthbert in Eugene, OR and the Marymoor in Redmond, WA. Phil played these 2 venues back-to-back with Further in 2013 (See Tale of 2 Trips), so I conclude that these are his favorite NW outdoor venues too. Anyway, June 11 and 12, Phil will be at the Cuthbert and Marymoor respectively, and so will we. With that, we have some serious motivation to have Hapy buttoned up by the end of May. In that spirit, I finally got after the big sections of the floor, so today's post is all about that. 

Tear Down

starting the Jute

I accept that maybe I have been finding ways to delay the full-blown interior tear down. I messed with electrical (See Ceiling Wiring Rough In), built a replacement shelf (See New Cab Shelf), even messed around with the stereo (I will post on that once it reaches completion). At some point, I was going to have to remove the lot couch and the rock-n-roll bed so I could get after the floor underneath them. The lot couch removes easily enough, but the sliders also needed to come out so I could get the complete floor. Back when I first installed these runners, I mounted the runners with 17mm bolts. I added nuts underneath. I initially just loosened the runners and forced the Jute underneath. I later decided to completely remove the runners so I could get a seamless heavy vinyl sheet down.

My implementation of the rock-n-roll bed is held to the floor by a pair of Phillips screws holding a pair of arms to the rear deck, a 17mm bolt underneath, a pair of small nuts on a metal bracket mounted on the passenger side rear wheel well and a single 13mm bolt through to the fridge cabinet. The electrical bits, however, add to the complexity. I have my luxury fuse box under there, so I had to tear down what was left of that. Plus, the original Westfalia electrical includes the cables routing city power into the rectifier (110 to 12V converter) that's buried inside a wood box and running to the outlet on the front face of the bed. The box is held down with 2 Phillips screws and the outlet box is held by 4 Phillips screws. With the electrical separated from the bed, and the bed detached from the floor, I removed the cushions to manage the unit better. Each of the 2 cushions are held to the bed with 4 long Phillips bolts on each end (so, that's 16 bolts).

cabin Jute mostly complete

I would have completely removed the fridge cabinet, but the mounting of the furnace was so difficult, I did not want to revisit that. Just being disconnected from the rock-n-roll bed loosened it enough for me to fit materials an inch or so underneath it.

Constrained Layered Dampener (CLD)

I have probably posted enough on this material. Still, I applied on the now exposed floor areas. Parts of the floor had already gotten a light treatment in the little valleys, so on top of that I applied larger squares of CLD as well. I still have about a third of the box of ResoNix, with a plan to use some inside the sliding door. I have used some of the Noico around as well. For example, the walk-through partitions behind the front seats each got a large splat of Noico. I do not know if I will be keeping those partitions long term, so I did not want to spend the expensive CLD on those panels. Still, the Noico definitely helped reduce the clatter heard when I tap on the partitions with the roller. Of course, the whole floor and the rock-n-roll bed needed a thorough cleaning, starting with a shop-vac and ending with cleansers. 

Heat Wave Jute

MLV over engine

I was so excited to finally get to the Jute. I has felt like forever since I ordered this stuff and started working on noise containment. I started with a rectangle on top of the engine access hatch, with an extra couple of inches all the way around. I pulled the computer cover, and Jute'd the rest of the rear deck, and then moved forward. I fit a segment under the rear edge of the fridge cabinet, and doubled up over the front side of the rear driver wheel well. I pierced the Jute for the seat belts and a grounding screw, and set another piece of Jute up to the lot-couch rear slider and continued my way forward, covering the entire floor with rectangles. My method was to define as large a section as I could easily manage and then measure that out on the material. I marked the line with a sharpie and then traced the line with a box-cutter to start the cut. I made a second pass with a pair of scissors. I tried first with just the scissors, but the thickness of the material and 2 foil-faces were too much even for my best pair. As I set shapes down, the bus got progressively quieter. Without a radio, and just ambient neighborhood noise, there was not a dramatic change, it just felt more and more quiet. Very neat. One last observation about the Heat Wave: the foil top and bottom are electrically conductive. So, I would discourage use anywhere near open circuitry or be sure to insulate. For example, I took a section of excess MLV produced below and have it resting between the foil and the spare tire well where the engine computer and fuse box live. No sparky.

Lot Couch Rails

I had loosened the rails enough to force-fit some of the Heat Wave jute underneath, but decided that getting the MLV under the rails would be worthwhile. This meant removing the rails entirely. I had forgotten that when I first installed these rails, I ran bolts from above and nutted from below. Three of the 4 nuts were hidden by the radiator, so getting in there to free them was an all-morning exercise. Still, the nuts came free, the bolts pulled out and the rails were set aside. I took this opportunity to clean under the rails as well as install 4 riv-nuts into the old holes, so I would not have to go under the bus and reach around the radiator to deal with the rails again. That riv-nut kit is definitely paying dividends.

Mass Loaded Vinyl (MLV)

MLV continues

MLV is heavy; my goodness, it is heavy (1 pound per square foot). I found that the sound inside the bus actually brightened a little bit as I set it on top of the Jute, though. The Jute, in contrast, was simply amazing in how much quieter the bus seemed as I added it to the floor.  While I can't measure the impact of the MLV independently of the rest of what I am doing, I do wonder if the additional weight will translate into a corresponding reduction in noise. The SecondSkin web site has a noise transfer reduction table for the MLV that defines the reduction as anywhere from 14dB to 37dB, depending on frequency, with higher frequency blocked more than lower. We'll see. The actual absorption by the Heat Wave was noticeable. The table on the SecondSkin page for Heat Wave (in coefficient rather than dB) demonstrates very little in terms of dB drop below 500Hz: below 500Hz < 3dB, 1k: 7db, 2k: 14dB, 4k:19dB. So, the very high end will be controlled well and the low end not so much. I arrived at these numbers courtesy of the formulas on this blog post, converting the coefficients published by SecondSkin.

Anyway, the MLV delivers in a roll 54" wide. The bus is around 60-1/2" wide so rather than solve for a strip along one side, I laid a section 54" long front-to-back, covering the engine compartment and on down the rear wall behind the rock-n-roll bed. After cutting contours for the narrowing of the rear of the bus, I pierced the MLV for the seat belts and installed them. This took a considerable amount of time, mostly because of the challenges of getting the seat belt mounts in place. I continued with the next sheet of MLV, covering the mid-floor past the lot-couch rail mounting points (see picture above, right).

Re-Assembly

bed and rails in

I chose at this point to re-install the rock-n-roll bed. Unlike the seat belt mounts, locating and piercing for the bed mounts was much easier for some reason. With the bed in place, I pieced holes for the lot-couch rails and installed them. To make a more firm mount to the floor, I added a nut between the rail and the floor for the bolt to pass through. These nuts act like a 3/8" riser through the Jute material. I confirmed the width of the rails (12") and then torqued the bolts. Then, I put the lot couch back in. The couch slid in more easily than it used to. I think the rails were slightly below the lip of the sliding door before, creating some friction/resistance. With the little risers, the couch slides right in. The interior is pretty much the way I started the weekend. Yes, from the start to end of this post, it was 2 full-for-me (6+ hours) days of work, and some uncovered sections remain.

On a random mid-week afternoon, I added an additional strip inside the rock-n-roll bed where the 2 larger sections meet as well as a small piece inside the fridge cabinet. Last, the area just in front of the fridge cabinet shown in the picture above was addressed. So, from the seat partition rear-wards is pretty much done. That leaves the cab still to do. All of the seams need to be taped as well, but that should be much easier once the rest of the Heat Wave and MLV have been laid out.

In case you were wondering, that reflective material in the wall behind the fridge is foil-backed "RV insulation" that I had put in there years ago. It actually does reduce the temperature inside the bus a little bit, or it did when I first installed it. Since it does not fill the cavity, I will probably just leave it and put the Mega Zorbe or Jute right on top if it. There is the old Q-Quiet vibration absorber on those panels as well, and I will just leave that be. I am running out of material, and this project has taken quite a bit of time already.

That's it for today. Thanks, as always, for following along-

Putting it to Bed

By now, most of the hard parts had been completed. Today's post covers the final bits and pieces, putting the project to bed, so to speak.

Rock 'n' Roll

bed, before

With the bare floor painted grey, the first of the last phase was getting the rock 'n' roll bed in. I'd pulled the contents out prior to its removal, but the bed is still pretty hard to move around by yourself. Still, with a mixture of dragging and heaving, I got the bed up and into place... without making the floor look too shabby in the process. Since the floor no longer had wood sheeting on top of it, getting the bed to align with the holes on the top of the engine bay wasn't quite as easy. It found it's home, though, and I was even able to get the little 2-bolt bit from the passenger tire well to slide home.

In the Light
Under the bed fits the auxiliary fuse box and battery. While in previous incarnations of this set up the battery powered a few different things, all it powers now are lights and 12V adapters. I already touched on some of this effort in an earlier post (see bump bump bump under "Cabin Lights"). Once locked in, I could move on to the refer cabinet.

bed, after

The Crunge
The fridge cabinet had previously just floated around, but I hadn't known that until removal day. Between removing the rear closet and the stove/sink, it held in place through simple inertia. There is supposed to be a bolt that threads into the fridge from the bed. That's now back in place and the cabinet is locked in tight. Between the fusebox and getting this cabinet in place, there were some wire-management issues too, but they're all well routed now, so no furniture is sitting on top of a wire. I still need to get the shore-power capable of charging the battery or simply feeding the lights and such, but that's something for another day.

Kashmir

middle seat in

We're getting near the end. I put in the rails for the middle row seat, following the holes and some blurry photos I took from the prior install. Without the wood floor in place, it seemed like the rails synch down tighter, but really, they were just lower, making the placement of the seat in the rails a little harder. After first just setting the rails in and finding that they were too close together for an easy fit, I took another tack. With the bolts in finger-tight, I tapped the rails as far apart as I could make them. Then, tightened them down for a fit. The seat slides in as easily as it used to (which isn't all that easy). I may need to Lithium grease the rails so the seat goes on easier.

In the middle picture, you can see that I've covered the rear driver-side window. I posted in "Whatcha Hiding?" about the screens I made a few screens to cover that window. As a final preparation, I painted the side that faces the inside of the bus with the same grey paint.

Well, that's really it for getting the bus back together. I was able to get it all done before the Memorial Day weekend so I'll post on that next time.

Think, then Do

Quick post. I cleaned the garage and started exposing the interior of the bus. Today goes through some of that.

Think Once
I hadn't realized just how much think time I waste on some projects. Take cleaning the garage as an example. Usually, I'll just start at one end picking things up and putting them away until I'm either done or sick or doing it. Then, I'll sweep whatever I find and call it good. Net-net, its a crappy job of cleaning, but it looks better than before, so I'll call it clean. This takes a long time. I realized this past weekend why, I think. For each item I pick up, I have to think about where it goes or should go. I'll take it over to that spot, and then have to figure out whether there's room, etc. Lots of standing there thinking time. This weekend I tried a different approach: think once.

I went into my garage with no intention of starting anything cleaning-ish. I had my coffee in my hands and wool socks on my feet. I just surveyed. Sports equipment over there. Christmas decorations over there and there. Skateboards and snow equipment in little piles. And, of course, lots of bus parts. I took mental notes of what needed to go where and considered what-would-fit-where all at once.

Then Do
Like anything else, once a plan is set, just execute the plan. All this sounds simple and obvious, I'm sure, but I'd never gone after cleaning a garage that way. I had it organized in half the time. Following a quick sweep, I was able to shift focus onto the bus. First, there was the not-so-small matter of all the exterior parts. Since I'd planned for where all those parts were going to go, it took 15 minutes to empty the bus of stuff. Then, I simply removed the rest of the interior of the bus.

Removing the Interior

interior strip in progress

I started with the wall panel. It popped off with light tugging with my fingers. Choosing to use standard fasteners rather than bolts pays off in the removal step here. Once the MDF is covered with thin foam and vinyl, it will appear as an even better decision.
The Vanagon middle sliding bench that I installed a couple of years ago is held in place with 4 13mm bolts. Remove them and the seat easily slides out. So I don't lose the bolts, I fingered them back into their original holes.
I discovered that the refer cabinet that I converted into a storage cabinet (see: From Fridge to Storage) is not actually held down. Neat. The cabinet pulled out very easily (obviously), but I'll have to consider how to actually mount it to the bus. There is a bolt that should pass between it and the rock'n'roll bed that is missing. That's a start, but it will need something else at one end or the other... or both.
Next is the rock'n'roll bed. It is held to the bus with 4 different fasteners. Two are obvious: they are the 2 Phillips head bolts holding the upper back to the section on top of the fuel tank. One the right side (facing forward), under the seat there are 2 small (8mm) nuts which hold the folding bracket to the right wheel well. Last, there is a 13mm bolt under the front-center of the seat, bolting the floor of the seat to the floor of the bus.
Last, I removed some of the thin sections of the wood floor that is used to keep the floor level. I chose not to remove everything just yet. I left the middle seat rails, the rock'n'roll bed and some of the wood in place at this point. I'm not sure if I need to paint the steel floor, but I'd like to at least inspect it for rust. Frankly, if I'm going that far, I might as well fill any little holes and paint it too.

Rear Window
Great movie, not a good seal. I replaced the rear (as in the window pointing to the rear) window seal a few years ago with a BusDepot seal. Usually their seals are pretty good, but this one separated at the upper right corner a while ago. I should have replaced it when that happened, but there's lots of shoulda's out there. Anyway, I had rust under the old seal, but when I cut this seal off, there was water under it. Since the bus has been in the garage for quite some time, that water was quite alarming. Once I had the seal off and the window out (don't forget to unplug the defroster wires from your window before you start cutting your seal), I could see some new rust. Drat. More to fix. I'll just add that to the list of rust repairs I need to make before I paint anything. That list isn't too bad, but it is growing...

That's it for today. One last thing: I taped a piece of paper to the side of the bus for me to write down any parts that I need to replace. The list is too long for just having a pile of "replace these" parts. When many of the parts are seals that I need to cut off, there's nothing to throw into the pile that I could reference anyway. This week, when there's time, I'll be repairing small holes in the interior and getting the rock'n'roll bed and wood floor out so I can make steel floor decisions.

Thanks for following along...