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Old Mar 17, 2007 | 08:47 PM
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7.3L tech

hey guys!
i have the option right now to put a 1992 7.3L non-turbo into my 77 f250
the guy is asking $1,500.00 and he says it runs great and has no problems.
i know of a zf-5(?)tranny for sale...
my question to you guys is, do oyu think these prices are fair' and what is the most you can tell me about this engine tranny combo?
what are common problems, good things, bad things, ect...

Thanks
Marshall
 

Last edited by 77f-250HB; Mar 17, 2007 at 08:53 PM.
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Old Mar 17, 2007 | 08:53 PM
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i also may use my existing np435 if possible..
 
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Old Mar 17, 2007 | 08:56 PM
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Welcome to the Forum! How many miles on the 7.3L? Is the ZF-5 from a diesel? If not she won't work for you.
 
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Old Mar 17, 2007 | 08:59 PM
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The NP435 that is a divorced transfer case? If so the ZF-5 won't work need a BW1345 or BW1356. They are direct drive bolt ons.
 
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Old Mar 17, 2007 | 09:04 PM
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not sure how many km's are on the engine...should be finding out soon though
no sure what the zf-5 is from, i e-mailed that seller.

yes the np435 is divorse mount x-case.
im not worried about direct bolt ins as i can make my own engine, tranny, and x-case mounting brackets.
i want to beable to retain my divorse mount np205 for driveline angles.
 
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Old Mar 17, 2007 | 09:13 PM
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The ZF-5 4X4 Trans has no tail shaft and the 1345 or 1356 bolts on direct and becomes the tail shaft. However the 4x2 ZF-5 has a tail shaft and you could run your divorced t-case.
 
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Old Mar 17, 2007 | 09:15 PM
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thankyou very much for the quick replys!
any common problems with this engine i should look for?
 
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Old Mar 17, 2007 | 09:29 PM
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Cavitation issues (cylinder walls too thin) basically a throw away but a decent engine if cared for but when it's done it's done.
 
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Old Mar 17, 2007 | 09:33 PM
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how can i tell if the cylinder walls are gone?
 
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Old Mar 17, 2007 | 10:05 PM
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How many miles on the engine?
Find out if the owner used SCA's in the coolant.
 
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Old Mar 18, 2007 | 01:07 AM
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the engine has 250,000km (157,000 miles)
and the engine could possibly come with a c6 auto and a transfercase.

What does it matter if the guy ran SCA's?
 
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Old Mar 18, 2007 | 01:13 AM
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sca's are very important in a diesel due to a condition called cavitation erotion. its a condition where microscopic bubbles form and pop, removing very tiny bits of metal from the liners, eventually wearing into the cylinder wall. sca's prevent this from happining.
 
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Old Mar 18, 2007 | 01:15 AM
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thankyou for that very important bit of information!
 
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Old Mar 18, 2007 | 02:14 AM
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undate on the engine..

I haven't noticed any valve train noise or any
other noises. (I just did the heads and top end of my 7.3)

The truck appears to be relatively well maintained. If I was going to put
the motor in another truck I'd change the water pump while I could get at it
easily.

The $1500 includes the motor and the wiring. The only problem is, the
previous owner took out the glow plug control and put in a relay. I have
another glow plug control though that can go with the motor.
he also said the x-case is a BW1356. but the tranny and x-case are not included in the price. i dont really need them anyways...lol
he also said he wasnt sure if the previos owner ran any kind of SCA
 
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Old Mar 18, 2007 | 09:03 AM
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That's a lot of money for a used IDI engine that you basically know nothing about. You can get a whole 4X4 truck with everything complete and running for that much. For that matter if you wait and watch you should be able to find a truck for $500-$1,000, complete and running. Maybe not 4 wheel drive, though. I see them selling cheap everywhere now, ebay, street corners, craig's list, local paper, etc. These engines are for sale everywhere for $300-$400. If I were going to be paying $1,500 for an engine it would still be in the wrecked(totalled) truck and the guy would have a receipt in his hand that proved(with matching numbers) that the engine had less than 20,000 miles on it.
 
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