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ford 7.3 diesels

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Iowa cornstalke

04-02-2007 10:22:49

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Looking at a 1992 Ford 4X4 F 350 with 155,000 miles with a new longblock 7.3 diesel.
Private owner totally reconditioned it--engine, radiator, brakes, tires, paint, clutch, etc, and the longblock with new pump and injectors. Planned on keeping "forever", and really re-did it right--really nice old truck. Now he's been diagnosed w MS and has to quit current occupation and will no longer need the truck.

Tell me about the IH 7.3.How would milage compare to a 460 gas? Is this a good motor? Plenty of power? Any and all comments appreciated. Thanks in advance.

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MartyinVa

04-03-2007 09:43:51

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Re: ford 7.3 diesels in reply to Iowa cornstalker, 04-02-2007 10:22:49

Kinda late posting this but here is my 92 with the 7.5/460.

7~8 mpg with or without the trailer.

Sure do wish I could hit the lottery to move up to diesel.

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cj3b_jeep

04-03-2007 08:28:17

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Re: ford 7.3 diesels in reply to Iowa cornstalker, 04-02-2007 10:22:49

Me and a buddy of mine just replaced the engine in a 1992 f350 4 door. He bought it with a broken crank, had 150,00 on it, but the previous owner abused it quite a bit. We put another 7.3 in it, and moved the turbo setup over. It was quite a job, but the motor has a huge amount of power and is supposed to get better mileage with the turbo. He's going to use the truck to pull a 5th wheel horse trailer.

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T_Bone

04-02-2007 21:36:25

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Re: ford 7.3 diesels in reply to Iowa cornstalker, 04-02-2007 10:22:49

Hi IC,

I agree that the owner is trying to snowball someone with at 155k of having to replace the engine. It would have to be in the $4k range for me too take a chance on it.

I get 250k out of my gassers without any problem and my VW diesel I got 300k. I'm expecting 400k to 500k from my 02 PSD.

Having turbo power is like adding another engine when you need it. Of course using the turbo cost money however I light foot mine and get 14mpg while pulling 16kGCW thru the Colorado Rockies and 19mpg empty. Using turbo power drops me to about 10mpg. A non-turbo engine will get alittle better fuel mileage but at 1/2 the power which is still more than the 460.

T_Bone

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D17 man

04-02-2007 19:34:24

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Re: ford 7.3 diesels in reply to Iowa cornstalker, 04-02-2007 10:22:49

my buddy has a 7.3 non turbo and it out lasted the truck. the cab and rest of the body rotted out and he replaced the whole body, but the motor has 330,000 miles on it and still strong.
the only bad 7.3 story i have is my uncles but he ran it on biodiesel and he beats the hell out of his stuff. he needs ether to start it every morning and he never gives it enough time to warm up before taking off

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banjo

04-02-2007 18:25:44

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Re: ford 7.3 diesels in reply to Iowa cornstalker, 04-02-2007 10:22:49

I had a 1993 f-350 4x4 single wheel and the best i got was 18mpg empty. hook a trailer behind it and would get 12-14 depending on conditions. this was plain 7.3 non turbo with the 5 spd manual and 4:10 gears. might not be the fastest to the top of the hill but would eventually get there.

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jdemaris

04-02-2007 17:08:30

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Re: ford 7.3 diesels in reply to Iowa cornstalker, 04-02-2007 10:22:49

7.3 ought to last 400,000 miles easy if taken care of. Makes me wonder what it's doing with a new engine at 155K if you say the owner takes care of it. Fuel mileage will depend a lot on how it's geared. My 94 7.3 turbo (not Powerstroke) 4WD F250 Ex-cab turbo has 4.10 axles and over-drive automatic. Best fuel mileage is around 15 MPG at 70 MPH. If the axles were a lower ratio, it would get 17-19 MPG. I've also got a older non-turbo 7.3 with 4.10 axles and no overdrive and it gets 12-13 MPG. My 1/2 ton Chevy 4WD 1/2 ton with 6.2 diesel gets up to 24 MPG but it's not much use for heavy work.

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midwest redneck

04-02-2007 13:31:40

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Re: ford 7.3 diesels in reply to Iowa cornstalker, 04-02-2007 10:22:49

Be sure that the Transmission is the Stick shift, the automatic is the worst for warranty $$$$ and could cost you big money for a new one. The 7.3 diesel has to be better on fuel, the 460 gets 9MPG, so I am told. I used to work for a parts supplier to the transmission plant that made the E4oD trans for that truck.

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Chad Franke

04-02-2007 12:09:58

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Re: ford 7.3 diesels in reply to Iowa cornstalker, 04-02-2007 10:22:49

The 7.3 may or may not have had a turbo. If it is a turbo, it will be more motor than the 460 with better mileage. Without, a little less motor, but better mileage than the 460, but with the added plus of putting an aftermarket turbo on and having close to a powerstroke for power, along with being able to sell it if you want. Try selling anything with a BB gas in it right now...

7.3 Powerstroke has different heads and injection system, but essentially the same block.

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Mike M

04-02-2007 11:08:47

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Re: ford 7.3 diesels in reply to Iowa cornstalker, 04-02-2007 10:22:49

I'm wondering why it needed all that work with only 155,000 miles ????? There was some trouble with the blocks getting pinholes into the coolant passages from electrolis (sp?) is this maybe what happened ?

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Tim B from MA

04-02-2007 11:36:28

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Re: ford 7.3 diesels in reply to Mike M, 04-02-2007 11:08:47

The pinholes in the block result from "cavitation". There is a decent explaination of it on the howstuffworks.com web site which I read years ago, but basically the powerful vibration from the engine causes the antifreeze (water molecules ?) to react with the block and starte eating pin holes through it. There is an anitfreeze additive the introduces sacrificial metal ions that get broken down instead of the block metal.

They can be fixed fine by sleeving the cylinders, but I have not knowledge about how reliable such fixes are.

Other than that, the 7.3L engines are great engines - I own a 2001 Powerstroke (same engine essentially with a turbo). Not so sure about the quality of the truck around the engine though. If they had put such an engine in a Toyota, I would have been all over it.

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Mike M

04-02-2007 12:44:36

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Re: ford 7.3 diesels in reply to Tim B from MA, 04-02-2007 11:36:28

I hear ya on those Toyotas. Dad has an old one around 1985 ? 170,000 mi bought it used and hardly spent any money on it. E brake even still works. I don't know if the newer Toyotas are as good as the old ones though ?

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