CK5
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'91 K5 Four Wheel Camper

This is the build for my 1991 V1500 Blazer, AKA the K5.3. It started out life being sold to the U.S. Government with a 350 TBI/700r4/241 combo. 4 years with a 5.3/700r4 Combo and now moving to an 8.1L Vortec and NV4500 5-speed.
We got n problem if he wants to come find us. My garmin will be on. Though he’s gonna have to figure out his own sleeping arrangements.
 
Xmas day progress. Since the family get together didn’t start until the afternoon I got some needed stuff done this morning. Oil changed and found my exhaust leak. Both sides at the flange to the pipe was loose. Each side. Not crazy loose but enough you could hear it.

Truck is partially packed. Laundry in the dryer so I’ll pack my clothes tonight.

Target location has changed. Rain has hit Death Valley in the last couple of days. Moving to plan b. Southeastern Arizona. Bomb around the desert, maybe go to tombstone. Might end up near Pima air museum and check it out. Nothing really set in stone. Just depends.

I’ll have my garmin fired up and shoot the link for anybody that wants to follow.
Pima was really cool.

IMG_4993.jpeg
 
You might be missing your only chance to see death Valley with/as a lake.

Enjoy the trip either way or any place you choose to see
We saw that and that’s part of why we wanted to go. We are going to work our way in the direction.

I thought I’d try something different too. I started a trip report just now and am going to try to update it nightly in camp. Here’s the link:
Adventure
 
Got the exhaust pipe covered up with exhaust wrap. Exhaust outlet reinstalled on the camper body. Tidied up the wiring and gave it another test run. It’s unseasonably warm here today as the temps were in the high 60’s. But within a 1/2 hour of running it using my temp gun I was seeing surface temps on the opposite side of wall of the camper near the roof (top down) were in the high 80’s. I did put the 90 Degree elbow on the outlet so now the outlet goes straight into the interior instead angled right at the fridge.

I spent a good chunk of time checking temps of the exhaust and make sure nothing is in danger of getting torched. The wrap does a good job keeping the pipe from melting anything near it.

I studied the manual to figure out how to regulate the temp/fan speed but my chinesium translator seems to be on the fritz. I’ll probably end up ordering a different controller to be able to run it in true thermostat style.
Any thoughts on making the exhaust a heat exchanger of some kind? Also, can it draw combustion air from outside? Drawing it from inside just brings more cold air into the camper.

On the RVs I've had, you had to be careful walking past the furnace exhaust. I'd be surprised if they were more than 60% efficient.
 
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Any thoughts on making the exhaust a heat exchanger of some kind? Also, can it draw combustion air from outside? Drawing it from inside just brings more cold air into the camper.

On the RVs I've had, you had to be careful walking past the furnace exhaust. I'd be surprised if they were more than 60% efficient.
I’m sure one could use the exhaust as a heat exchanger. Partly why I didn’t hear is the pipe without the wrap got very hot. Like well over 200 degrees. Since I’ve got the heater mounted to a wood structure I was concerned with it catching fire from the pipe.

I guess one could plumb in outside air for the combustion intake. At least in my case the camper leaks enough air it really won’t make much difference.

There is no doubt the outlet temp of the exhaust is hot. But it dissipates quickly only a few inches from the outlet.

I think these little diesel burners are pretty efficient. I doubt I used any more than a gallon of fuel over a weeks worth of use. 3-4 hours a night and 1-2 hours when I woke up. I would have burned through a 20# bbq cylinder in the same time. I’m sold on it for sure. I wouldn’t have a problem picking up another that is portable unit and run on 110v to use as a garage heater.
 
Running the exhaust through a heat exchanger would restrict the air flow enough to stall combustion one you don't remove the exhaust fast enough.
 
Running the exhaust through a heat exchanger would restrict the air flow enough to stall combustion one you don't remove the exhaust fast enough.
For sure that happens at some point - the question is how much is OK. Maybe a couple of bends would be OK. Removing the heat wrap and replacing it with a heat shield would theoretically put more heat in the camper. Maybe it's not worth overthinking for occasional use.
 
For sure that happens at some point - the question is how much is OK. Maybe a couple of bends would be OK. Removing the heat wrap and replacing it with a heat shield would theoretically put more heat in the camper. Maybe it's not worth overthinking for occasional use.
Honestly, if the camper was a bigger space the little diesel heater might need some help. But seeing how the camper interior space is so small I had to shut it off. If I had it running 3-4 hours it was easily 80 degrees in the camper. That’s running it on a lowest setting. Since mine doesn’t run a true thermostat style system it just gets warmer and warmer in there.

Which given the fact when I have it on it’s constantly running it is impressive how frugal it is on fuel consumption. Getting a thermostat style controller would make it better for sure.
 
This guy runs the exhaust through a giant cast iron radiator.
 
This guy runs the exhaust through a giant cast iron radiator.
I’ve already got a 7,400 pound Blazer, what’s another 150 pounds of cast iron added into the mix? :haha:Plus the space it would eat up.

But for heating up a two car garage? Hell yeah. That’s a pretty cool idea.
 
I installed a LOT of those diesel heaters (Esbar brand) in semi sleepers. They work really well.

Martin
 
Welp it’s getting to the time of year to prep the big dog for our annual desert trip. First thing up is shoes. The Cepeks served their purpose well. The tires worked good on dirt, rocks and snow. Road manners were pretty solid too. They are pretty chewed up from three years of use. Wear was consistent at least.

Here is where my problem came in for replacement I’m still rolling on 16” wheels. Selection of 16’s anymore sucks if you’ve looked lately. So I went on the hunt for some 17” wheels. I almost pulled the trigger set of H2 wheels for $650. But as I found those I found a set of American Racing Baja wheels in black and had some 315/75 17 Goodyear Duratrac on them. Two were new and the other three had decent tread left. Price was $1000 for the 5.

I picked them up Friday and threw them on the truck. Wheels cleaned up pretty easy, no curb or rock rash. The wheels alone were worth the price compared to buying new.

I’ve got another exhaust leak to fix before the trip, oil change, grease job and general nut/bolt check. I’m pretty sure the leak is at the head so new gaskets are in order. I’ve torqued the studs cold and hot and still have the leak. It’s enough it’s throwing off the o2 sensor and fuel trims as the mileage is pretty consistent in the 11pm range.

The trip is in June so I’ve got time to knock it all out.


 
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