curoius about rebuild
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curoius about rebuild
i have a 1990 f250 7.3 idi. it is parked right now, but it needs some work, i was wondering if anyone could help me out with some info. i am wondering if anyone knows how dif it would be to rebuild the engine, what it would take to put a solid front axle on it and also what i would have to do to put 1 ton leaf springs. any info would be appreciated
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Joined: Dec 2006
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From: Massachusetts
The difficulty of a 7.3 rebuld depends on mileage and previous owners maintenance.
You see, the 7.3 is a 6.9 that's been bored out. So the cylinder walls are thin. Thin enough that sometimes cavitation happens...that's when the cylinder walls can develop a small pin hole where the antifreeze enters the cylinder. Bad news!
What makes you think you'll need a rebuild?
If it's running rough and has high miles, you'll probably just be due for a fresh fuel system: Injection pump and Injectors. Apparently they're only good for about 100k miles before they start to wear out. $400 for the Injection pump and $200 for all 8 injectors ($25 each).
If you feel there are internal issues, you can tear the engine apart and take it to a machine shop and have them magna-flux it. This is a process that detects cracks and could show if you have any issues. While it's there, they will measure the cylinders to see if they are within specs. A hone job would be great. Avoid the overbore...
For the front axle, you'd be looking at a Dana 60. You'd need to get one from an 86-97 F350. If you get one that's a dually, you'd need SRW hubs off a Dana 60 SRW or Dana 50. If you got a SRW Dana 60, that'd be the best.
There are many threads about this that have more info than I could ever remember. But it seems like your stock F250 leaf springs stay for the swap, the Dana 60 bolts to them fine.
For 1 ton springs...you want fronts or rears? You can swap F350 rears into an F250...it's all bolt up. But beware, F350 pickups are the same as your F250...but F350 cab and chassis wth a 34" wide frame use narrower leaf springs that will not bolt into a pickup.
You see, the 7.3 is a 6.9 that's been bored out. So the cylinder walls are thin. Thin enough that sometimes cavitation happens...that's when the cylinder walls can develop a small pin hole where the antifreeze enters the cylinder. Bad news!
What makes you think you'll need a rebuild?
If it's running rough and has high miles, you'll probably just be due for a fresh fuel system: Injection pump and Injectors. Apparently they're only good for about 100k miles before they start to wear out. $400 for the Injection pump and $200 for all 8 injectors ($25 each).
If you feel there are internal issues, you can tear the engine apart and take it to a machine shop and have them magna-flux it. This is a process that detects cracks and could show if you have any issues. While it's there, they will measure the cylinders to see if they are within specs. A hone job would be great. Avoid the overbore...
For the front axle, you'd be looking at a Dana 60. You'd need to get one from an 86-97 F350. If you get one that's a dually, you'd need SRW hubs off a Dana 60 SRW or Dana 50. If you got a SRW Dana 60, that'd be the best.
There are many threads about this that have more info than I could ever remember. But it seems like your stock F250 leaf springs stay for the swap, the Dana 60 bolts to them fine.
For 1 ton springs...you want fronts or rears? You can swap F350 rears into an F250...it's all bolt up. But beware, F350 pickups are the same as your F250...but F350 cab and chassis wth a 34" wide frame use narrower leaf springs that will not bolt into a pickup.
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