Cummins Conversion Update
To watch motorcycle racing at Indy. Moto GP -- it's like the F1 of motorcycles. Those things are bad a$$!
Just an install issue and that's it. It just won't quite all clear...the oil pan, front crossmember, and upper cowl, with the valve cover still on.
Took a much needed day off (mostly) of working on the truck and went to watch a buddy of mine go motorcycle racing today...man, do I miss doing that. Anyway, no major progress, but did get the radiator shroud brackets located and the new holes in them drilled this evening. They're hanging in the garage now with paint drying on them. They'll get put on tomorrow along with the shroud. Radiator will be temporarily put in place so I can locate the engine fore/aft and get a measurement for driveshaft length...this has to be done tomorrow, probably in the morning. Also need to locate the engine so I can get measurement for the IC tube lenghts.
Looked over the wiring stuff too and am going to clean it up a little more. There's only a few wires in the 42 pin connector that I actually need to use, so I'm going to work them into some unused pins on one of the Cummns connectors. Should be clean with only the two Cummins plugs in the engine bay.
I'm going to try and get all of the wiring done by tomorrow night. Will probably pull the driver's side inner fender out, take the tire off, and work from on everything from there. I think that will help give some extra room to work. Only wiring I won't get done tomorrow is battery cables and anything that was taking 12V straight from the battery. I need to get the batteries in before I start with that.
I thought that the idea of the plates, adapters and all was that we mount the 5.9 right up to the tranny which remains in its stock location which means stock driveshaft. Guess I had that wrong, or did I? What gives?
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I thought that the idea of the plates, adapters and all was that we mount the 5.9 right up to the tranny which remains in its stock location which means stock driveshaft. Guess I had that wrong, or did I? What gives?So tomorrow my goal is to get the wiring all done (minus the battery stuff), get the heater core hoses hooked up, and get the power steering lines hooked up. I've got to go get a new pressure hose made for the power steering tomorrow too. Either that or see if someone can lengthen the one I have now. It's simply too short to fit, but the fittings are a direct fit for the power steering pump.
I don't know how you do it?
I would have had to fire that thing up right on the stand just to make sure it worked. It's like what, 3 wires, fuel line and what not? I see it is not nearly as straightforward as I had imagined.I for one do not dig the drive shaft modding. I would be trying like he!! to move stuff up front if possible, but I am sure there is a reason why that does not work. Still wouldn't stop me from trying.
Keep us posted. I know it's going to be a brute.

Mike, I guess I want to fire it when everything is ready and done, rather than have it running then be in a rush to get everything else tied up and have it look sloppy & hacked. I have no reason to think it won't run. But, you're right, it's only 3 wires, fuel, and tie the coolant lines together to make it run on the stand. Part of it has to do with the new cam too, since it has to be properly broken in. I didn't want to fire it and have it running on the stand for 20 minutes...cooling would be an issue then and it's not worth the trouble of mocking up a radiator for just that.
The driveshaft thing is not a big deal at all. It's a simple matter of removing just a bit from the front tube. My guy pulled the spline out, cut off the tube, then re-welded the spline back in. No worries at all. Good thing I took it to him though, because he also found it out of balance, which he fixed. Perhaps that is what was causing my highway vibration at 60-65 MPH.
The motor has to go back a little though, or the fan will hit the radiator. No way around it. Even after modifying the top brackets to move the radiator forward, there's not enough room, as the radiator is basically against the top crossmember now and the fan is not more than 3/8" from the radiator with a tight fit for the shroud to radiator. It's just part of it.
The last couple days have been pretty productive.
Radiator and IC were mocked up so I could get measurements for the driveshaft and IC tubes.
Got the fan shroud brackets back from getting additional metal welded to them and drilled new holes to mount them. You have to use an engine mounted shroud for the conversion, which is an 05+ shroud, so the brackets have to have metal added and new holes drilled to work on the 03-04 motors. The 05+ motors have a different front cover on the engine that have extra holes for the bracket. The pic I posted last night was the modified brackets.
Modified the top radiator brackets that hold the radiator to the crossmember. Top of the radiator has to be moved forward to clear the fan, even with the engine moved back further.
The fan shroud is a 2 piece affair, and one part has to be basically cut up and you end up only using the top part of it as an appearance cover.
Fuel lines are all hooked up and sending unit for the fuel pressure gauge is in place. New filter in the Aeromotive fitler and a new filter for the Dahl should be here tomorrow.
Heater core lines are hooked up. That took some figuring out to get everything so I was happy with it. I basically took the Ford heater hoses and cut them up to fit how I wanted. I replaced my coolant shutoff valve when the AC is in use from one that just shut off the flow on one hose to one that will recirculate the coolant. I also put tees in the heater hoses that will run to my coolant bypass filter, which I am going to locate in the back side of the front bumper.
The flexplate/torque converter cover had to be trimmed down to fit with the Destroked adapter plate. The pic doesn't show much, but basically the top and driver's side had to be trimmed. Still need to paint it though.
It's raining here, so I'm on hold for a while. Supposed to rain all day tomorrow as well, including the evening, so it may be the weekend before I can do anymore. I picked up my high pressure power steering hose today -- it had to be lengthened, so I can get all the power steering stuff hooked up. The black tee in my pics is what I'll use to hook the two return lines to the single inlet on the Cummins reservoir. It's brass that I just painted black to look a little cleaner.
My downpipe showed up this week too, so I can get it fitted up and decide how much I need to get trimmed off of it, since it's quite a bit longer than I need right now. It's 304 Stainless though, so I'm not sure my sawzall will buzz through it. I may have to take it to the steel shop to get it cut with one of their bandsaws.
Most of my air intake stuff showed up today. Everything but the filter. I've got a couple 90* and some 45* stuff that should allow me to get everything in place. I'm using 4" tube for all the inake stuff and for a filter I've ordered the AFE version of the 6637. Found it on Amazon for $85! It should flow well more than enough air than I need and with that much filter area, I shouldn't have to clean it often.
If the rain lets up, I'm going to go out and put together my power steering hoses and try to get the driveshaft put back on the truck. I may also try to get some of the wiring done that's easier to get to from the front, like the changing the connector for the AC compressor and hooking up the wires for my Autometer gauges. That will allow me to at least get the front end put back on and I can finish the rest of the wiring from the fenderwell, taking out the inner fender to work on it. Just depends on how long stuff takes and what time it is.




