I have an early 99 7.3 6spd 273,xxx miles 4x4 F250(03/98) build date with #5 cylinder missing and smoking, I have found a late 99 7.3 6 spd 81,xxx miles 4x4 F250(02/99) farm truck and just trying to get an idea what I am in for before I buy it. From what I understand they will interchange and I may have to switch some parts just like EBP. I would like to take the low mileage engine and trans and use my early 99 transfer case since its electric shift and the late 99 is manual shift. Any help would be appreciated.

 

The short story is if you use everything on the engine including the turbo it will plug and play. The later turbo sits higher so attaching your downpipe will require some work. If you have the donor truck you can use it's downpipe if you can't make yours reach. You will also need the turbo inlet pipe (the last piece of rubber intake) from the later version. I don't know what about the EBPV, sensor or tube would come into play.

The other differences are in the front suspension and rear calipers. There could be something I'm forgetting, I do that a lot.

 

Remembered item #1:

The late version has an intake air heater (IAH) in the spider. You can do what you want with it a) nothing, b) cut the element off of it (that's what I did), c) get a pricey high highfalutin plug for it, d) run a boost feed off it with the purchase of 'c' above.

 

thanks for the info

 

And if you go for it you should ask around here, there are a couple of guys looking to convert to manual trannies, if they're near you they would want some stuff.

 

Probably the most obvious you have already thought of: what is the maintenance history? Did you get a sense that the owner is honest? Can you do a compression test through the glow plug holes or a leakage test. Or if not, a look under one valve cover with a USB camera to see if there is any sludge lets you know that the oil was changed regularly. As you know, the injectors on these trucks don't like old oil, so of all the maintenance, oil changes are the most important.

One other thing, pull the turbo intake and look for evidence of "dusting", wear on the compressor blades that indicate dirt getting by the filter or use of an air filter that didn't do its job.
Larry

 

Here's a pdf from Ford showing changes made to the engine.

 

Should work just fine. Take some pictures during the change if you can post them. We all like pictures.

 

Bumping this back up since it was raised.

Man I'm a hoarder