Hapy Heat Repeat (Part 1)

Ask anyone who has owned or simply driven an old air-cooled Volkswagen in not-Summer and 9 times out of 10 they will regale you with tales of being cold. These awesome vehicles were designed to have heat, its just that they were also designed to be owner-maintained, and maintaining the cabin climate control is not easy. With aftermarket replacements of J-tubes for heater boxes, cardboard pieces eventually failing over time and long channels under the car (where road salt, etc gets in), it's no wonder heat doesn't make it. Anyway, today's post documents another attempt to get some warmth into Hapy, specifically onto my feet and maybe even onto the windscreen.

Why the Obsession

By now, you must wonder why am I so focused on getting heat into the bus. And I get it. Put on a coat or something, right? Besides, it's not like we really get snow in the Northwestern Willamette Valley. This is all true. For folks who own these cars and busses in genuine snow country, I suspect either they are summer-only vehicles or you are far more brave than I, driving in moon boots or something. Around here, we really only have about 10 weeks of warm-to-hot weather out of the 52 in a year. For the rest of the year it is either cold or cold and raining. Driving around in the cold is not as fun when you're bundled up (ski-gear head to toe) and still cold. Regardless, the temperature is hovering around the dew point during those 42 weeks, and overnight for most of the 10 weeks of warm-to-hot season. In the mountains, it approaches the dew point earlier in the evening and remains later into the morning. So, having a means of getting the fog off the windscreen, and not adding to it, is super important.

The Plan

so it begins

Last November, I posted an update (see: Hapy Update) where I replaced Hapy's crappy glow plugs with a new set. I did not circle-back on that since, but he has started without a hitch all winter. Those plugs are fantastic. The real test will be how well they behave next winter. Anyway, in that post, I mentioned that I had acquired a Maradyne Fans heater unit and shut off the Vanagon rear-seat-heat unit because I believed it had started leaking again. We had a "break" in the weather (almost 10*C / 50*F and only occasional rain), so I took the unit out to Hapy. The think was to remove the old, and swap in the new. Ain't nuttin ever that easy, but it's in now.

Old Heat Exit

The Vanagon rear-seat-heat was suspended from beneath the belly of the bus just forward off the radiator. I had fab'd a custom plenum from the heater unit into the original 3" diameter air channel, run coolant lines along the driver side to feed it and run electrical from the dash to control the fan. I hadn't tried to control the valve, choosing to leave it on or off by setting the valve before a drive instead. I unplugged the electrical first, then the flashing/plenum that routed the air into the 3" channel. Then I set to removing the heater from the underside of the bus. Both of the nuts at the bottom of the threaded bolt supporting the unit had rusted so I had to encourage them with a hammer.

Last, the coolant lines needed to be removed. I held the lines closed with vice grips so I did not lose a bunch of coolant and then set a dishpan underneath so I didn't spread coolant all over the ground when I disconnected things. The lines removed easily enough and a small amount of coolant dribbled into the pan. From this I concluded that the unit had been the source of the leak in the cooling system or there would have been more than the few ounces that appeared. I set the unit aside and shifted to the new heater.

New Heater Hung

mounting angle

For installing the new unit, I started with placement thinks. I wanted it in essentially the same place, running air into the same 3" diameter hole. The force and size of this new unit dwarfs the Vanagon rear-seat-heat unit, however. The Vanagon unit is 6" tall and about 9" wide. The Maradyne unit is also 6" tall, but it is almost 18" wide. The Maradyne unit arrived with a cover that had 3 3" vent protrusions. The outer edges of those protrusions are 13" apart, so I decided I would retain the cover and enclose the vent protrusions inside my new plenum. I was unable to reuse any of the old piece.

After some failed attempts to place the heater straight/level with the ground, I shifted the mounting hardware so the new heater was at approximate 45* angle with the bus, pointing upwards. One would reasonably assume this would cause the unit to hang considerably lower, but because of the placement of the fans, the unit is only about an inch lower. How? Well, in this configuration, the top edge of the heater unit nearly touches the floor of the bus. Neither the Vanagon rear-seat-heat nor this unit could do that in the horizontal position because of all the various pipes running under the floor. In the picture on the right, here, the heater looks much lower than the radiator; that is probably caused by the angle I held the phone. In reality, the radiator is a hair lower. The mounting brackets have 2 holes, designed to be used with the enclosed screws. Yes, that's right, screws, and short ones at that. With this install design weakness in mind, I suspended the heater from a pair of metal tubes under the bus floor with.. wait for it... cable ties. Yeah, that is so RoadKill; I am not a fan of using cable ties this way. Having said that, I have not ever experienced a failure with cable ties, and if my 20-year history with Hapy is any guide I will be up under this bus fairly frequently. So, I will be able to monitor the health of these ties and resolve before any real issue arises.

Plumb It

With the heater relatively stable, I flipped to the driver side of the bus and started working on the coolant lines. As I mentioned in the referenced post from November, I picked up an old-skool control valve. Prior to installing, I noticed that the valve seemed to operate more like a shut-off valve than a gradual taper. When "closed", it was definitely closed, but it remained mostly shut through about half of it's travel, then opened up very quickly through the next 1/4 of it's travel and then that last 1/4 its no more open, in fact it almost seems to close a little bit. So, from closed to open the valve really only had to move a little over 1/4 of it's overall travel. I chose to drill out a little bit of material at the barely open part of the valve so that the first 1/2 of travel now actually opens a little bit near the end of that movement. Overall, I think the open-to-closed is closer to 1/2 the overall travel now.

Once modified, installing the coolant lines part was fairly easy. I cut a short stretch off of the return line, and added that to the return off the heater. To that I attached the valve, minding the indicated direction of coolant flow marked on the side. Last, I connected the supply and return lines and then removed the vice grips. I am not 100% thrilled with the routing of the hoses and will incorporate a 45* angle so they are not forced so route to low. After this picture was taken, I shortened the return line another inch or so to reduce the droop a little bit. I poured a bunch of water into the coolant bottle and called it a day as it was starting to get dark.

Plenum

I returned the following morning to complete the job. In a typical install of one of these Maradyne heaters, either the purchaser connects 3" hoses to the outlets or maybe some directional vents (neither are included). Remaining a-typical, I assembled a 4 sided plenum, like the one before it, held together with the higher-end flashy ducting tape.. The top is a 13" by 5" rectangle with 1" long drop-down sides, with a 45* angled rear tail and an up-turned front (image on the right). The bottom is 13" long by 4" (with 1" drop-sides along the shorter edge) and the plenum sides are right triangles with 4" long sides. Remaining ever cost-conscious, I cut material from the old furnace intake. Recall, it was 15" square, so I cut up one side and got 13" length with 1" for the drop-sides with one cut. I taped on the top and bottom first, then the sides, and closed up all the gaps. I get this is not exactly contours-quality... this is far from that. This is all about getting on the road with whatever heat I can extract from a TDI engine. Besides, the last taped-together plenum lasted a few years and would have continued had I not torn it apart for this install.

Electrical

Before I got started on the electrical, I looked back on the post I wrote about the Vanagon rear-seat-heat fans (See Defrosting - Part 4). I discovered that the fan switch that I bought for that install was the exact same as the one that delivered with the Maradyne fans, just with a different knob. So, while I could run new wires and replace the switch, I didn't need to. So, I didn't. Instead, I cut the 3-wire plug off the fan power wires and the ring terminal, leaving enough material so I could reuse it somewhere later. I added female spade connectors to the four wires. I could easily identify the ground wire and low-fan wire so I connected those and tested the fan. Success! And even on low, this fan is more powerful than the Vanagon rear-seat-heat unit on medium. It probably rivals that unit on high, in terms of airflow, but not fan noise. This is super quiet: no fan noise, only the sounds of the rush of air.

With a multi-meter, I confirmed which of the remaining 2 disconnected wires was the wire for medium. I decided that since I had a strong 12V signal, I would reuse the relays and simply wire up the fan. This was also much easier and it insurers that the wires won't melt when I turn the fan on one of the higher settings. The air flow on the "medium" setting is considerable. Boo and I have noticed that the heat in ToyoTruck is most effective on the not-highest setting, concluding that the air speed is so high on the highest setting, it is unable to pull heat out of the heater core as it passes through. As I wired up the high fan, I considered that we could have a similar issue in Hapy now, and may really only use the lower 2 speeds. Time will tell.

Any time the coolant system is open, there are a series of engine runs or test drives followed by adding water and coolant until it levels off. Since I did not need to drive Hapy during the week following this work, I didn't run the engine. Instead, I prepared for "part 2".

The inlets for the fans are drawing outside air and the control valve is still managed by rolling under the bus. I'll get to the valve eventually, but I don't want to wait too long. The drawing outside air, however, needs to be considered right away. As it is, a drive through one of our seemingly ever-present puddles and I've got warm fog blowing up on the windscreen. At least until I route the fan inlets to the bus interior. Since wet season will persist for another few months, I got after changing the air source shortly after I completed this post. I added the image on the right here to illustrate the first problem I encountered: the return coolant line runs straight through where an air inlet would go. Of course, the support bracket isn't helping either.

Thanks, as always, for following along-

Hapy Speedometer Cable replaced

I mentioned in my last NewOldHouse posting that Hapy's speedometer suddenly stopped working on the way home from a party. It worked on the drive there, but didn't on the way home. Fortunately, there was lots of traffic for me to keep pace with ,but it's still annoying not having a speeod. Today's post covers the adventure of replacing the speedometer cable. Before I begin, today's my birthday, so Hapy Birthday to me, I guess.

Symptoms

working on concrete!

It makes sense to start with the symptoms I noted before the speedometer stopped working. Other than the obvious of it not working, during the drives prior, I noticed that the speedometer needle was bouncing an awful lot. This is often a sign that the cable is binding either due to age or because it hasn't been lubricated recently. Since it was the original cable, and I had never lubricated it (I know bad owner), I concluded that the cable had broken. Had I recognized these symptoms earlier, perhaps I could have prevented the failure. Ultimately, I am not sure the cable actually broke, but at this point in my process, my conclusion seemed solid. Before I began, I disconnected the battery. I did not want to pop a fuse or smoke another wire.

Removing

Someone posted on the Samba that replacing a speedometer cable took 15 minutes. I know better, and assumed it would take me hours, which proved correct. Because of the size of the holes through which the cable passes, it can only be removed one way: from the wheel up through the back of the dash. So, I started with raising the driver-side front corner and removing the front wheel, and then the grease cap. With a pair of pliers, I removed the hard rubber boot on the rear of the wheel (that the speedo cable passes through) and then pulled the cable through. I wiped off the grease and then got under the bus, pressing back the 2 sets of tabs that hold the cable to the underside. Then, the cable easily pulls through to the front of the bus.

Next, I reached around the steering column and detached the cable. In Hapy, the cable actually enters a converter box that creates a wave pulse for collecting speed and mileage for the TDI computer. I hadn't connected the wiring for that, but it was between the speedo cable and the speedometer. With the speedometer disconnected, I could pull it up through, feeding from below with one hand while pulling taught with the other. Once the cable was out, I tried turning each end, and watched the other end turn, albeit sporadically. So, the cable was good, but not working very well. Since I had a brand new cable, I decided to keep going.

Preparing

cable lubrication

I took the new cable over to the side and started working silicone-based cable lubricant into it. My process was fairly simple: shoot some into the speedometer-end of the cable until it pooled up to the lip. Then, wiggle and turn the cable from the other end until the puddle disappeared into the cable sheathing. I repeated this may times. Once I was satisfied that there was a lot of lubricant inside the cable sheathing, I laid the cable flat so the lubricant could spread out and took a long lunch.

I added a little bit of lubricant to the outside of the wheel-end of the cable so I could easily add the rubber boot and then started my re-install. I had purchased 2 circlips for the wheel end of the cable and a new grease cap. I shot the new grease cap with some wheel paint so the brassy cap would not be so grossly out of place. 

Installing

I started by passing the cable from behind the dash, choosing to not pass it through the oval hole in the steering column support. Why? That hole seemed to prevent the cable from easily installing, and actually seemed to force the cable to bend unnaturally. By skipping the hole, the cable had a much more gradual curve back behind the dash. Time will tell if this was a poor decision. Finding the hole through the floor in the nose proved to be the single most time-consuming part of my process. Since I had added holes and electric cables, I had more wrong ones to chose from. Once I found it (there are 2 original holes, one directly in front of the other. The speedo goes through the one that's rearward), the cable easily passed through and I was able to route it the rest of the way to the wheel. I refrained from securing the secure-to-body tabs at this point so I had the most play in the cable at the wheel.

I slid the rubber boot on and then passed the cable through the wheel. I left myself plenty of excess so I could add the grease cap and circlip. I found, however, that the new grease cap did not fit. It is just a hair too small. After many attempt to make it work, I abandoned the new cap and switched back to the original. Because of the nature of the grease cap, I found the grease had found its way to the edge where the cap needed to seat on the wheel. With grease on that lip, the cap would not rotate with the wheel. I think this may have been part of the bouncing speedometer needle. To remedy, I cleaned the edge of the cap and the seating lip with brake cleaner, careful not to let it near the greased wheel inside. Once clean, the cap fit on correctly and rotated in time when the wheel spun.

Satisfied with the cable attached to the wheel, I added a touch of silicone grease to outer edge of the rubber boot and fit it into the hole. I tried to fit it without the lubricant, and it would force the grease cap off. With the lubricant, the rubber seated and the cable is set. I moved to the body-securing tabs next and closed them snug. Last, I returned to the behind the dash to connect the cable.

Extra Conditions

Hapy as album cover

It was at this point, that I started to question the quality of the speedometer cable converter box. When disconnected from everything, spinning one end of the converter had no resistance: is spun normally. If I connected it to the back of the speedo and gave it a spin, the needle would move. What was interesting was when I connected the cable to other side of the box. The output would not be fluid consistent. I could spin the wheel and see the cable rotate freely by itself but as soon as I connected it to the converter box, the converter box output was all over the place. At this point I concluded that the box was the main problem. Since I had not been capturing or using the output of the box, I decided to not integrate it, connecting the cable directly to the rear of the speedo like everyone else.

To test, I spun the wheel a few times and I could see the odometer slightly move in the 10th-of-mile. I concluded that the main issue was resolved. Since I was back behind the dashboard again, I needed to confirm I hadn't done anything wrong, so I verified the running lights, fans and hazards after reconnecting the battery.

That's it for today. While it was a little frustrating getting the cable replaced, it re-excited me about working on Hapy. I have a serious backlog of things I want to do, so if the weather is willing, and I have some time, maybe I'll get after one of them next weekend. Thanks, as always, for following along-

NewOld Kitchen progresses

Quick check-in post today on the state of the kitchen. Most of this work is being done by others while I work my 9-5 and then Boo and I clean up or move stuff around on the evenings and weekends. The construction has been moving at an incredible pace after so many months of seemingly slow-go. To be fair, I was only really getting after it on weekends versus a crew working multiple days. So, it's probably not fair to me to compare. On the personal side, my band's EP (find detail here) released on Groundhog's Day (2-Feb) and my sister came to visit for the following week. 

Where Were We

current state

Once the floors were finished, we could get moving forward on the kitchen. Consider, we have been living without a kitchen for about a year. Instead of a kitchen, it has been a version of an efficiency apartment where we have a fridge, but only a crockpot, a single burner hot plate, a microwave and a hot pot for making food. I suspect most folks, at least Americans, would have lived on take-out food. Had this project only lasted a few weeks, we might have gone that route. Into our 12th month like this, however, yeah, we could not afford that. After the plumbing work I described last time was completed, our electrical rough-in was done by our friend Gary.

Electrical Started

For electrical, we simply focused on the "sink wall", making sure we had juice where we needed it for the dishwasher and disposal, as well as some over-counter outlets. Last, he ran a line for task lighting over the sink. Since that initial work, he returned to run the 220V for the wall oven and the 110V for the fridge. He will return to run lines for the stove and some additional outlets.

Drywall and Cabinet Set

rough plumbing done

With the electric on the "sink wall" done, Ray, our general contractor was able to get the drywall repairs completed. This included some of the rough bits around the new rear door, the holes for the old furnace location, the false beam where I removed that wall and everywhere else in the main kitchen space. Once drywalled, mudded and sanded, they primed and then painted. Once dry, the "sink wall" cabinet was cut down to fit the dishwasher, and both were set in place. They continued by installing the pantry cabinet and fridge, and then the cooktop peninsula. The cooktop peninsula, similar to the sink wall cabinet, was cut down to fit our space. Again, most folks design and buy cabinets to fit the space. We bought and are customizing. Considering the cost of new cabinetry, both in terms of dollars and environmental impact, this path is far less expensive on both counts.

So we could get a sense of the workability of the space, Ray cut down some 3/4" plywood for countertops and pin-nailed them into place. The cabinets along the once-furnace-wall have not been cut down and installed yet but already it feels like there is considerable space to work in. We have not had a kitchen in a while, so it is more pronounced for us, but visitors have made similar observations: for what looked like a really small space from outside, it is looking like it will be very functional with lots of counter space. Boo and I have been calling it the TARDIS-effect. Dr. Who fans unite.

Water and Gas

setting pantry depth

For the water rough-in, the plumber did everything he could that did not require a permit. From that point forward, the work is either mine to complete, or I need to get permits and farm it out. Boo and I decided to split the difference: I do the work, but have the gas plumbing inspected by the gas company. Fortunately, the water is quite simple these days: shut off the main, release the pressure (dumping water down the drain) and do the work. In terms of the work, there are shark-bite valves that are no-solder connections. I simply cut off the closed nipple on the end of the pipe and attached the shark-bite around the pipe. It really is that simple. Once the valves were on, we could re-pressurize the system and check for leaks. Seriously, it was that easy; I have no idea why that part of the plumbing needs a permit while the pipes in the walls don't. 

For the gas line, we ran 3/4" pipe from the "T" near the furnace over to the peninsula in the crawlspace, but did not connect it. Instead, where the union will be, we capped it off. At the peninsula, we necked down the 3/4" pipe to 1/2" per standard to pass through the floor. Above the floor, we added a pressure gauge. All of the joints were coated with pipe-dope, of course. We applied air-pressure into the pipe run (from cap near the "T" to the pressure gauge) to 15 psi to verify there were no leaks. As of the publishing of this post, the pressure is still holding at 15 psi. We did all this so we could document it with pictures for the gas company inspector. We do not have the inspection scheduled yet, but after 5 days of holding 15psi, I think we have demonstrated we are good. I expect to finish the gas line next weekend.

what's next

That's as far as we've gotten in the last couple of weeks. It has been a whirlwind of activity, though. Next up will be the construction of a cabinet to hold the wall oven, installing the oven into that and then installing the cabinets along that wall. We have not made any decisions about upper cabinets in the main work area. At this point, however, we are considering leaving the walls without upper cabinets nor open shelving. We have a cabinet we call "the Archie" that we expect to install next to the oven cabinet (on the all in the picture on the right, here). It is possible that it will be the only upper cabinet. Again, we'll see how it evolves.

Thanks, as always, for following along. Hapy broke his speedometer cable a couple of days ago, so I will be posting on that replacement as soon as I've completed that.