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Old 09-15-2017, 03:19 PM   #176
winslowgoodwin
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

very nice build
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Old 09-21-2017, 06:39 PM   #177
mattfranklin
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

I don't think I saw this build before. Very cool. And the funny thing is that I'm not normally a huge fan of diesel conversions.

But this one is different. Cool fab skills. AND I have spent hundreds of hours next to a 4-53 just like this one in the engine lab. I love the scream of these beasts. I see the pics and I can almost hear it. And smell it.

Nice work!
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Old 09-21-2017, 09:17 PM   #178
burnitg
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

Quote:
Originally Posted by mattfranklin View Post
I don't think I saw this build before. Very cool. And the funny thing is that I'm not normally a huge fan of diesel conversions.

But this one is different. Cool fab skills. AND I have spent hundreds of hours next to a 4-53 just like this one in the engine lab. I love the scream of these beasts. I see the pics and I can almost hear it. And smell it.

Nice work!
Thanks for the complement. We share a love of the sounds that Detroit Diesels make.

I haven't made much progress lately. We have a short summer here (the aspen leaves are already turning) so I spend my summers working outside.

I'm currently focusing on completing the underhood - the air filtration, A/C and electrical systems.

Burnett
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Old 10-20-2017, 05:50 PM   #179
burnitg
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

A little restoration is good for the soul...

Summer is over, the chain saw and wood splitter are put up for the winter and the plow is on the Mog. Time to get back to work on the old GMC.

I restored/modified the A/C unit for the truck. I decided to do it now because of my paranoia from the air cleaner housing debacle. I want to make sure that I know where the all parts will be when I finally come up with an air filter design.

Even though I purchased the truck in an area where good A/C is important (St. George, UT), I knew that there were issues. The brass gate valve in the heater hose was the first clue:

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In the 5 years that I drove the truck before I started this project, the A/C performance was disappointing. I checked the pressures and they were good - so there was plenty of Freon and the compressor worked fine.

After I disassembled the A/C unit, I found that the warm/cold air damper was binding on both sides so it would not seal in either heat mode or cool mode. In fact, the gap on either side at full travel was more than an inch. No wonder, the A/C didn't work satisfactorily. The only good news is that the heater puts out so much heat that it was able to overcome the cold air coming through the evaporator (at 9000' elevation, heat is much more important than A/C). A little trimming of the damper gaskets solved the problem. Now it snuggles into the gasket on both sides and seals well.

I also decided to convert from the continuous running POA style control to the cycling compressor control. This meant a new evaporator and accumulator had to be installed. I will modify the wiring later when I complete the engine compartment harness.

Here's what it looks like all cleaned up and sitting in the truck:

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Now that I have both ends fixed, I can start working on the tubing and hoses for the refrigerant.
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Old 10-23-2017, 10:02 PM   #180
Dieselwrencher
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

Looking very nice! I regret not finishing my AC stuff the first time. I'll have to revisit that, uh, sometime?
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Old 11-04-2017, 07:18 PM   #181
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

What is it about electricity?

Every used vehicle that I have purchased has included some electrical modification(s) by the previous owner(s). Every one of the modifications have been dangerous in some way. For one, none of the modifications have included proper circuit protection. Most have included lamp cord - not the best for automotive wiring, few have included any protection from chafing, etc. It has all been bad.

My '72 was no exception. The only difference was that the previous owner(s) were good at hiding their sins. I didn't find the poor wiring until I took the truck apart. Then, I couldn't believe that I had driven it for 5 years without having a fire. I'm happy to be lucky...

I'm adding a few circuits of my own and intend to do the job right. I need both new circuits and relays to control some substantial loads - trailer wiring, vacuum pump and air compressor. I started with a Painless Wiring Cirkit Boss and a Hella Relay Panel.

The Cirkit Boss has 4 circuits powered from a relay that operates from the ignition key and 3 always hot circuits. I have used one on my daily driver for 15 years and it has performed flawlessly.

Since the wires come out the bottom of both the Cirkit Boss and the relay panel, I fabricated a mounting bracket for the to mount to the driver's side inner fender. Here it is on the workbench:

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Here it is mocked up in the pickup from the front:

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Here it is from the side:

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A couple of coats of black paint and it will be ready to go.

Since the hoses for the hydroboost and power steering arrived from Summit Racing, I decided to mock them up as well:

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I'm making progress on the underhood equipment, I still have a ways to go...

Last edited by burnitg; 11-05-2017 at 12:54 AM.
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Old 11-05-2017, 11:05 PM   #182
Dieselwrencher
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

Very nice work! Did you make the hoses or do they offer a kit for them? Those fittings for the hydraboost and pump weren't cheap when I got mine.
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Old 11-06-2017, 01:03 AM   #183
burnitg
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

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Originally Posted by Dieselwrencher View Post
Very nice work! Did you make the hoses or do they offer a kit for them? Those fittings for the hydraboost and pump weren't cheap when I got mine.
Unfortunately, they do not offer a kit. I had to order the hose and fittings seperately. They are still not cheap; but, the cost was comparable to the prices that I have paid for other hydraulic hoses. The fittings are reusable so I cut and assembled the hoses myself. At least it saved me a trip to town to have them crimped.
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Old 11-30-2017, 01:42 PM   #184
superduty_59
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

Such an awesome build. Love the 2-strokes. I still see a lot of them in generators. I have even serviced some rare ones like 3 qty 24v71's and 2 qty 12v149's. Most of them are 6v92's or 6-71's though. Is there any new progress?
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Old 11-30-2017, 03:34 PM   #185
burnitg
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

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Originally Posted by superduty_59 View Post
Such an awesome build. Love the 2-strokes. I still see a lot of them in generators. I have even serviced some rare ones like 3 qty 24v71's and 2 qty 12v149's. Most of them are 6v92's or 6-71's though. Is there any new progress?
Thanks for the compliment. Most of the 2 cycle Detroits that I have seen have been on generators and fire water pumps. Tha largest that I have seen and heard was a 16V-149 on a generator.

I'm still working on the underhood stuff - A/C and batteries. I had to mount the A/C compressor on the driver's side of the engine because the alternator and water pump were on the passenger's side. I didn't want to route the A/C hoses over the top of the engine which created a new set of problems - more modifications to the core support, long lengths of A/C tubing, new brackets, etc. It has been slow going, lots of time and not a lot to show for it...
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Old 12-11-2017, 07:51 PM   #186
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

A/C System mock-up - DONE!

I finally finished the mock-up of the A/C hoses and tubing. I had to mount the A/C compressor on the driver's side because the water pump, and consequently the alternator, were on the passenger side. On Detroit Diesels, the water pump is on the side and driven off of the camshaft or balance shaft by a couple of v-belts. The alternator is used to adjust the tension of the v-belts.

Mounting the compressor on the driver's side created a problem - how to route the hoses. I considered going over the top of the valve cover; but, didn't like that option. I decided to go around the front.

Here's a photo of the driver's side showing the compressor and hoses:

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Here's a photo from the front showing the condenser and the tubing:

Name:  AC Tubing - Front.jpg
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Here's a couple of photos on the passenger side showing the evaporator and the hoses:

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Name:  AC Hoses - Passenger's Side - 2.jpg
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I still need to take the hoses to town to have the ends crimped on. Once I get that done, I'll be able to pull the system down and see if there are any leaks.
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Old 12-12-2017, 11:26 AM   #187
Dieselwrencher
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

Very nice and clean routing of your ac system!
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1976 K30 CC SWB Build Thread

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Old 01-06-2018, 08:37 PM   #188
burnitg
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

Transmission Overhaul Part 1

With the new year, I thought that it was time to change gears (literally). My brother and my two sons were out for New Year's and I was inspired by the thought of having help to move the parts for this heavy (350+ lbs.) transmission.

The transmission is an Eaton Fuller RT-6610. I have 4 tasks for this overhaul:

1. Replace/refurbish - replace all the bearings and the output shaft seal (the only seal) to ensure the longevity of the transmission.

2. Convert to overdrive - the difference between a RT (direct drive) and a RTO (overdrive) transmission is the input gear, 4/9 gear and the position of the first two gears on the countershafts. I purchased an overdrive kit for the transmission that included new input and 4/9 (now 5/10 - overdrive) gears, a new shift fork and new sliding clutch.

3. Installation of studs for the transmission rear support - although the transmission is perfectly happy cantilevered off of the bell housing, I want to install a rear support for it. The transmission weighs 350lbs. and the engine weighs 1100 lbs. so the rear engine mounts have roughly 900 lbs. on them when the transmission is cantilevered. I don't like putting that much weight on a single point of the chassis. The transmission arrived with plugs in the holes for the studs. The plugs have, so far, resisted all my attempts to remove them. I will probably end up drilling them out.

4. Cleaning and painting - the exterior of the transmission is very rusty. I will remove the rust and paint it.

Here's a shot of the beast on the operating table:

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Here's a shot of the two sections apart. It took us hours to get them apart, even though the transmission has jacking bolts to speed the process, because the alignment dowels were rusted to the case.

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The left side countershaft did not come out easily either. The rear bearing was on the shaft so tightly that I could not drive it off. I had to carefully cut it out of the transmission. Here's what was left after I got it and the shaft out:

Name:  Countershaft Bearing Destruction.jpg
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All my help has gone home; but, we were able to complete the disassembly and press the gears off and back on the counter shafts (the difficult jobs). I'm left with the cleaning, painting and re-assembly. That will be the next post(s).

Last edited by burnitg; 01-08-2018 at 03:32 AM.
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Old 01-08-2018, 04:01 PM   #189
Dieselwrencher
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

Nice work! Those transmissions are getting harder to find around our area.
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1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1976 K30 CC SWB Build Thread

Tired of spark plugs? Check this out.
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Old 01-09-2018, 12:54 PM   #190
burnitg
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Re: Project Screamer - '72 GMC K2500 + DD 4-53T

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Nice work! Those transmissions are getting harder to find around our area.
Thanks. It is a very robust, well built transmission. Fuller's support for them is excellent. Too bad they are becoming scarce.
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