Re: Question for the ford guys
I'm looking to replace my two wheel drive 1/2 ton tow rig with a four wheel F250 because I'm towing 3500 pounds. The question is, when is a 7.3 diesel done? I'm looking at two, a 1999 king cab unknown body miles but replaced 7.3 for 11k or a 2001 extended cab with 256k on the clock for 10k. Thanks for any help.
Ford upgraded the older 6.9L Navistar Diesel to a 7.3ci version in 1988, in 1994, for one year only they added a turbo charged option to the indirect injected old school engine, this lasted only part of that model year. In late 1994 they released the first 7.3L Direct Injected Turbocharged Diesel. That motor ran pretty much unchanged other than a few updates until 2003.
I've seen various versions of this motor last well over 400K, but I've also seen a few die long before they hit the 200K mark. How well you care for it and keep up on the maintenance as required will determine it's lifespan. I ran a 1985 F250 with a retrofitted 1989 7.3L IDI motor for 450K before selling it in favor of a 1997 7.3L Powerstroke truck, which in turn I ran for 250K before selling it after it's towing capabilities were no longer needed.
If your not sure about one of those engines, fine a good mechanic and pay him to evaluate the truck and engine. Their not a cheap engine to fix or replace, so be sure what your buying. A compression and leak down check, as well as a computer scan would be in order.
The injector seals were an issue in the early Powerstroke versions, as were the IDM module which fires the injectors. If these fixes were done, even the first year models can be good engines.
Myself, for reliability, I've come to prefer the older mechanical injected engines, they still give gobs of torque but have a lower HP rating and slower acceleration. They are far cheaper to service and repair though. I miss my 1985 F250 Diesel the most.
I would estimate that transmission life expectancy behind a diesel Powerstroke is most likely around 100K to 150K. Anything beyond that is a gift if your towing. I've yet to get any automatic transmission to survive beyond the 150K mark in any vehicle. Seals and clutches all wear and deteriorate with heat and age.