Cummins Conversions Discuss conversions here. For instance, if you want to put a REAL engine in a FORD, this is where you would talk about it!

1983 D350 Crew CTD 5speed

Old 03-25-2018, 08:40 AM
  #16  
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 44
Likes: 0
Received 3 Likes on 1 Post
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.
Pmschmitt is offline  
Old 03-25-2018, 09:09 AM
  #17  
Registered User
 
NJTman's Avatar
 
Join Date: Dec 2010
Location: Land of the Toxic Avenger
Posts: 6,049
Received 1,218 Likes on 837 Posts
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.
NJTman is offline  
Old 05-25-2018, 10:53 AM
  #18  
Registered User
 
oliver foster's Avatar
 
Join Date: Dec 2008
Location: vermont
Posts: 4,348
Received 1,165 Likes on 747 Posts
Any progress on the crew cab?
oliver foster is offline  
Old 05-25-2018, 07:01 PM
  #19  
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 44
Likes: 0
Received 3 Likes on 1 Post
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
Pmschmitt is offline  
Old 07-22-2018, 04:03 PM
  #20  
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 44
Likes: 0
Received 3 Likes on 1 Post
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. Made some room in a buddies shop where the conversion will begin.
Pulled the fenders and the entire front end for ease of working.
Got the motor and tranny out. Now the fun begins
Pmschmitt is offline  
Old 07-22-2018, 04:06 PM
  #21  
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 44
Likes: 0
Received 3 Likes on 1 Post
Fabing up the new bulkhead plug and hydraulic slave cylinder hole
Getting closer
Pmschmitt is offline  
Old 07-22-2018, 04:28 PM
  #22  
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 44
Likes: 0
Received 3 Likes on 1 Post
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
Pmschmitt is offline  
Old 10-04-2018, 10:27 AM
  #23  
Registered User
 
oliver foster's Avatar
 
Join Date: Dec 2008
Location: vermont
Posts: 4,348
Received 1,165 Likes on 747 Posts
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.
oliver foster is offline  
Old 10-09-2018, 03:19 PM
  #24  
BHD
Registered User
 
BHD's Avatar
 
Join Date: Nov 2005
Location: BFE, Pennsyltucky
Posts: 794
Received 155 Likes on 107 Posts
Originally Posted by Pmschmitt View Post
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 used the diesel brake booster because I had one from the donor and it didn't leak, also if Dodge made it different from the gasser, its different for a reason. Maybe the vac pump on the Cummins isn't as efficient as the gas engine vacuum? That is my 2 cents.

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.
BHD is offline  
Old 10-09-2018, 05:28 PM
  #25  
Registered User
 
u2slow's Avatar
 
Join Date: Mar 2010
Location: Salt Spring Island, BC
Posts: 790
Received 86 Likes on 69 Posts
Originally Posted by Pmschmitt View Post

1) it looks like I need a diesel brake booster bc the shaft is narrower where it connects to the pedal correct?

Thanks
Quite sure its a year thing... a '90 D250 (cummins) booster fit directly on a '90 ramcharger pedal. On my '77 W300 the booster rod is fatter where it connects to the pedal.
u2slow is offline  
Old 11-14-2018, 09:42 PM
  #26  
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 44
Likes: 0
Received 3 Likes on 1 Post
Update


Bed off to drop the tank


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.

Just about to put the engine in. They sent me the wrong motor mounts.
Pmschmitt is offline  
Old 11-26-2018, 07:01 PM
  #27  
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 44
Likes: 0
Received 3 Likes on 1 Post
Engine in



Engine in

Engine in
Pmschmitt is offline  
Old 01-05-2019, 08:03 PM
  #28  
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 44
Likes: 0
Received 3 Likes on 1 Post
Itís 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?
Pmschmitt is offline  
Old 01-05-2019, 10:21 PM
  #29  
Registered User
 
Join Date: Nov 2002
Location: Hamilton,MO
Posts: 744
Likes: 0
Received 27 Likes on 20 Posts
Leak may be from fuel heater above fuel filter.
dodgenstein is offline  
Old 01-05-2019, 10:51 PM
  #30  
Registered User
Thread Starter
 
Join Date: Dec 2017
Posts: 44
Likes: 0
Received 3 Likes on 1 Post
Did they have those pre 1994? Motor is out of a 93 1st gen.

Thank for for the idea
Pmschmitt is offline  

Thread Tools
Search this Thread
Quick Reply: 1983 D350 Crew CTD 5speed


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.