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1983 D350 Crew CTD 5speed
moving this thread here from the 12 V driveline section as it seems more appropriate. Here is the build 1983 crew cab 2wd with a gas 360 4spd manual, going to swap in a 93 12v with a 5spd getrag. Here are some pics of the build truck and donor.
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https://cimg5.ibsrv.net/gimg/www.die...a7b2c37133.pngRecipient
https://cimg6.ibsrv.net/gimg/www.die...2f1c796cc4.pngRecipient https://cimg0.ibsrv.net/gimg/www.die...022c86197.jpegRecipient https://cimg6.ibsrv.net/gimg/www.die...95c57257e.jpegRecipient https://cimg8.ibsrv.net/gimg/www.die...bb6b9cab9.jpegRecipient https://cimg1.ibsrv.net/gimg/www.die...e456c9d89.jpegDonor 1993 12v with 5spd https://cimg3.ibsrv.net/gimg/www.die...72bd4a0fe.jpegSome usable interior parts https://cimg6.ibsrv.net/gimg/www.die...432371722.jpeg12v rad and other parts in the bed |
Diesel fuel pump sending unit
https://cimg3.ibsrv.net/gimg/www.die...9c45a4740.jpegFuel tank had been dropped by the PO. there was no fuel pump sending unit. Are these readily available? What is best place to find one?
https://cimg5.ibsrv.net/gimg/www.die...508e233e0.jpegThis plastic nipple was broken off. Not sure what this is. |
You do not need to use that roughed up diesel fuel tank.
On my white crew cab. I just lowered the gas tank, emptied it, and re filled it with diesel. I then screwed in a diesel sending unit, attached the fuel lines and was ready to run. If you can not find a diesel sending unit out by you and you want one, I have several on my shop shelf. |
Great info. Does anyone make a diesel sending unit you can buy? They seem hard to find. I do not have one with the donor truck.
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I know the OEM ones are sold out.
I am un aware of an aftermarket one. |
Wiring harness
thoughts on using the 93 harness vs the 83 harness. Thrashing cows had the great input that the 83 is analog and the 93 is digital. I was just going to see what all of you who have done this swap thought? Better to use all of the 93 or try to keep most of the 83? I prefer the 83 steering column over the 93. Can I use the 83 column for the clutch pedal reinforcement so long as I drill holes in it?
Honestly i I am looking for the easiest solution for the swap so if someone has a recommendation I am all ears. I plan to run AC and heat also. Cruise control would be nice but is not a must. The 83 has cruise control on console also |
I used the '85 wiring and steering column in my white crew cab. That would be the easiest solution. I ran the coil wire to the FSS and most of the rest plugged in with a simple pig tail change or something as easy as an oil pressure sensor swap.
Then cable drive speedo and cable just threaded into the 29 spline NP-205...easy peasy. I didn't concern myself with grid heaters, A/C or cruise control. Everything on the dash works. On my '89 RC and '85 black crew cab the complete diesel donor truck wire harnesses, gauges, steering column, ETC where swapped over, which takes some time. Yes you will need to drill the holes for the hydro bracket for the clutch. |
Thanks for the update on the wiring.
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Do you need the grid heater or is it not necessary?
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I only drive my crew cabs in the summer so it is not necessary for me.
You could easily put it on a push button if you where planning on driving it when it was really cold out. Wiring up the grid heater on a push button would be much easier that swapping out all the wires. |
Progress
https://cimg0.ibsrv.net/gimg/www.die...4e8dc44ca.jpegCleaned up the seats.... removed 20 years of dirt and grime.
https://cimg1.ibsrv.net/gimg/www.die...0ce0161ad.jpegGot the trans back after a full rebuild https://cimg2.ibsrv.net/gimg/www.die...5ce00538b.jpegPulled all the wiring harness, fenders hood front clip. About time to pull the motor. I also had a question about the front end. I was planning to put 93 springs on the front of my 83 so it can handle the weight of the cummins. Are these a direct swap? Was gonna do the front end at the same time. |
Originally Posted by Pmschmitt
(Post 3341578)
I was planning to put 93 springs on the front of my 83 so it can handle the weight of the cummins. Are these a direct swap? Was gonna do the front end at the same time.
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https://cimg6.ibsrv.net/gimg/www.die...eea784ad0.jpegProgress has been slow due to weather. Pulled the donor motor https://cimg8.ibsrv.net/gimg/www.die...3c9894ab4.jpegThere she sits. Waiting for a rear main seal, front crank seal and oil pan gasket. |
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Front suspension rebuild
so before I stab the cummins into the crew cab I am rebuilding the front end on the 1983 d350. I have upgraded all the suspension and steering parts to 1993 (diesel) products and ran into a small snag. Everything fits its except the diesel outer tiered ends will not fit into the gas steering knuckles. I am left with 3 options. 1-tear it back down and use the knuckles from the donor truck after I get them off the donor truck 2-send back the diesel tie rods and order the gas ones for the correct year. 3- drill out the knuckle to accept the larger tie rod end. Thoughts? all help appreciated. |
Not number 3 unless you're a machinist by trade, or have one you trust can,produce the proper taper in the knuckle end. Problem I would,think, is the enlargened hole would exceed the design tolerances of the knuckle.
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Any progress on the crew cab?
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It has been slow going I have rebuilt the front end with all of the diesel front end parts and all new moog suspension parts It is back together now All I have to do is yank the 360 and stab in the cummins and getrag Trying to find time in my schedule to get it done https://cimg1.ibsrv.net/gimg/www.die...428d7103a.jpeghttps://cimg2.ibsrv.net/gimg/www.die...083d72c80.jpeg |
7/22 update pulled old motor
I finally started the no going back step of my cummins swap. I pulled the old 360 and tranny out. And started the conversion process. https://cimg2.ibsrv.net/gimg/www.die...6500fecee.jpegMade some room in a buddies shop where the conversion will begin. https://cimg5.ibsrv.net/gimg/www.die...4c4e782e3.jpegPulled the fenders and the entire front end for ease of working. https://cimg8.ibsrv.net/gimg/www.die...765d86c34.jpegGot the motor and tranny out. Now the fun begins |
https://cimg8.ibsrv.net/gimg/www.die...ef432a30b.jpegFabing up the new bulkhead plug and hydraulic slave cylinder hole https://cimg9.ibsrv.net/gimg/www.die...da6c3dcdd.jpegGetting closer |
Couple questions which have come up for those of you who have done a crew cab conversion 1) it looks like I need a diesel brake booster bc the shaft is narrower where it connects to the pedal correct? 2) what is the best way to go about converting the fuel system from gas to diesel? Just swap I diesel sending unit? Does anyone have a recommendation on type of fuel lines? What about a sump? Would I still need a sending unit? Thanks |
I have seen the gasser brake boosters used, so I know it can happen.
As far as converting the fuel system. Drop tank [easier but can be done in place], drain gas, clean [if you want]. refill with diesel and reinstall with a diesel sending unit. Prime lines and start the motor. You can use a bottom of the tank sump, but leaks concerns have always kept me from using this option. Drilling a hole in the bottom of a fuel tank, just seems dumb to me. I order diesel rated fuel line from Geno's Garage usually for my projects. Cut to fit and install. |
Originally Posted by Pmschmitt
(Post 3350899)
Couple questions which have come up for those of you who have done a crew cab conversion 1) it looks like I need a diesel brake booster bc the shaft is narrower where it connects to the pedal correct? 2) what is the best way to go about converting the fuel system from gas to diesel? Just swap I diesel sending unit? Does anyone have a recommendation on type of fuel lines? What about a sump? Would I still need a sending unit? Thanks When I did my RamCharger conversion I did exactly like Oliver suggested. Drop the tank, clean, swap senders, install. When I built the FireWagon, I used the gasser sender that had a return port. |
Originally Posted by Pmschmitt
(Post 3350899)
1) it looks like I need a diesel brake booster bc the shaft is narrower where it connects to the pedal correct? Thanks |
Update
https://cimg8.ibsrv.net/gimg/www.die...9e44e1284.jpeg
Bed off to drop the tank https://cimg9.ibsrv.net/gimg/www.die...4730b3049.jpeg https://cimg2.ibsrv.net/gimg/www.die...64d557a7c.jpeg This is what my gas sending unit looks like. Will the diesel one fit in? I have it ordered for pick up at the parts store tomorrow. I think it is gonna be too small. https://cimg0.ibsrv.net/gimg/www.die...488151f20.jpeg Just about to put the engine in. They sent me the wrong motor mounts. |
Engine in
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It’s alive
update on conversion. So I ended up using the stock fuel tank and stock gas sending unit it had a return on it. I replaced the fuel lines with marine grade diesel fuel lines and installed a high volume low pressure lift pump from the hungry diesel for reliability. The truck is going to be as mechanical as possible deleting the computer. I will be retaining the original 1983 wiring harness. I got it fired off for the first time today and it ran great. I do have an injection pump leak and a leak at the fuel filter. The fuel filter. It is a new filter. Could there be a bad rubber seal at the top. Any experience with this? |
Leak may be from fuel heater above fuel filter.
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Did they have those pre 1994? Motor is out of a 93 1st gen. Thank for for the idea |
Originally Posted by Pmschmitt
(Post 3356795)
Did they have those pre 1994? Motor is out of a 93 1st gen. Thank for for the idea |
Fuel heater is a black disc about 3/4" thick above fuel filter. It is held to the head by the stud that holds the filter on. The stud is double ended, and can loosen when filter is changed. O-ring can dry and leak also.
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I wonder why your 93 motor has a 89-91/94-02 fan hub? So you will not be able to use the 93 fan shroud.
Truck is coming alone nicely....Well done! |
Originally Posted by oliver foster
(Post 3341319)
You do not need to use that roughed up diesel fuel tank.
On my white crew cab. I just lowered the gas tank, emptied it, and re filled it with diesel. I then screwed in a diesel sending unit, attached the fuel lines and was ready to run. If you can not find a diesel sending unit out by you and you want one, I have several on my shop shelf. |
Originally Posted by Pmschmitt
(Post 3355095)
https://cimg8.ibsrv.net/gimg/www.die...9e44e1284.jpeg
Bed off to drop the tank https://cimg9.ibsrv.net/gimg/www.die...4730b3049.jpeg https://cimg2.ibsrv.net/gimg/www.die...64d557a7c.jpeg This is what my gas sending unit looks like. Will the diesel one fit in? I have it ordered for pick up at the parts store tomorrow. I think it is gonna be too small. https://cimg0.ibsrv.net/gimg/www.die...488151f20.jpeg Just about to put the engine in. They sent me the wrong motor mounts. |
Update and ac work
ok well i got the Cummins fired off about 3 weeks ago, but have been slammed at work so progress has been slow. I am finishing connecting all the accessories up and had some questions about the AC. The donor truck And the gas truck were factory AC trucks. Does anyone know of a good source for new AC lines? I have several sets but they are all rusted and pretty sketchy. I went by orely and they did not have a set in their computer. I need all the lines sonpart numbers would be helpful and source as well. Also does anyone have any recommendations on AC compressors. They are all over the map. $350 at oreilly or online for around $180. Thoughts? I’ll post more pics once I get some stuff done. |
You can find the pre-91.5 Non-IC AC lines I believe, but not the later IC AC lines. But the Non-IC motors used the C-171 AC compressor (Diesel units are no longer available) compared with the Sanden unit used from 91.5 on up and readily available, I would want to run the Sanden AC compressor myself.
As for the lines you will either have to gamble on your used lines, or bring down the used lines to an AC shop and have them make you up some new custom lines. |
Thrasher thanks for the input, I found a local ac/ hose/ hydraulic shop that can repair my ac lines. You had had mentioned in an earlier post that my fan was from a pre 91 or after 94 and the fan shroud wouldn’t work. I don’t know why that would be as the fan was on this motor. I have ave noticed that things look like they may be tight around the radiator fan shroud etc. I am using the 93 front crossmember for the intercooler and ac. Should everything fit since the engine is in the stock gasser engine mount location. I appreciate all y’all help paul
Originally Posted by thrashingcows
(Post 3358537)
You can find the pre-91.5 Non-IC AC lines I believe, but not the later IC AC lines. But the Non-IC motors used the C-171 AC compressor (Diesel units are no longer available) compared with the Sanden unit used from 91.5 on up and readily available, I would want to run the Sanden AC compressor myself.
As for the lines you will either have to gamble on your used lines, or bring down the used lines to an AC shop and have them make you up some new custom lines. |
Originally Posted by Pmschmitt
(Post 3358695)
Thrasher thanks for the input, I found a local ac/ hose/ hydraulic shop that can repair my ac lines. You had had mentioned in an earlier post that my fan was from a pre 91 or after 94 and the fan shroud wouldn’t work. I don’t know why that would be as the fan was on this motor. I have ave noticed that things look like they may be tight around the radiator fan shroud etc. I am using the 93 front crossmember for the intercooler and ac. Should everything fit since the engine is in the stock gasser engine mount location. I appreciate all y’all help paul You do have a '89-'91.0 or the '94 and up fan hub style. You will find it sits too close to the '91.5-'93 radiator. It will also be offset to the drivers side when it sits in the shroud of the '91.5-'93 shroud. I bet you are going to find you want the hard to locate '91.5-'93 fan hub and pulley wheel. That is what I am installing on my '95 P-pumped motor I am installing on my '78 Ramcharger build as I want to use the '91.5-'93 radiator and fan shroud on my '78 core support. |
I located a 91.5-93 fan pulls so I got that sorted out. The only parts I still lack are a good set of ac hoses for the 91.5-93 model with the sander pump. None available aftermarket or from dealer. I have exhausted my efforts at the local local wrecking yard and ac shops. |
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