Engine rebuild kit for '94 7.3 idi turbo? - Diesel Forum - TheDieselStop.com
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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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Old 06-06-2012, 01:51 PM   #1 (permalink)
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Engine rebuild kit for '94 7.3 idi turbo?

Hey guys, my truck threw what sounds like a rod bearing last week and I've looked and looked for a rebuild kit but no luck. Every kit I find say's (except for 93-94 turbo.) Need to get going soon so any information on rebuilding it would be appreciated. Thanks

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Old 06-06-2012, 02:56 PM   #2 (permalink)
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welcome to the Diesel Stop

Biggest difference in the N/A and Turbo 7.3 IDI is the exhaust valves when it comes to parts for a rebuild. Other than that you can use the bearings and such for any 7.3 IDI.
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Old 06-06-2012, 05:17 PM   #3 (permalink)
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When it comes to rings, the factory turbo IDI's have keystone rings and pre turbo engines don't. That's possibly the only difference that comes to mind in a rebuild kit. Wrist pins are bigger but pistons aren't part of a kit.
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Old 06-06-2012, 05:59 PM   #4 (permalink)
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Quote:
Originally Posted by LMJD View Post
When it comes to rings, the factory turbo IDI's have keystone rings and pre turbo engines don't. That's possibly the only difference that comes to mind in a rebuild kit. Wrist pins are bigger but pistons aren't part of a kit.
I'll have to remember that tidbit about the rings.


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1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually Photos
ATS Turbo upgrades: 3" DP with 3" exhaust Magnaflow XL muffler: Pictures Here
2012 Copper Canyon 273 FWRET w/2 slides, Air Lift 5000 bags
Pillar pod: Autometer C2 Series gauges: pyro,trans, boost, water, oil pressure
Hypermax Cowl induction, K&N air filter, flex-a-lite 26K trans cooler with fan,Tekonsha prodigy
Train Horns: Pictures here

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Old 06-06-2012, 08:02 PM   #5 (permalink)
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The exhaust valves I know how to go about but where would you guys recommend I get the pistons from?
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Old 06-06-2012, 08:33 PM   #6 (permalink)
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Since Mahle makes pistons for diesel engines. Might want to talk to them:

MAHLE North America | Aluminium pistons for gasoline and diesel engines
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1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually Photos
ATS Turbo upgrades: 3" DP with 3" exhaust Magnaflow XL muffler: Pictures Here
2012 Copper Canyon 273 FWRET w/2 slides, Air Lift 5000 bags
Pillar pod: Autometer C2 Series gauges: pyro,trans, boost, water, oil pressure
Hypermax Cowl induction, K&N air filter, flex-a-lite 26K trans cooler with fan,Tekonsha prodigy
Train Horns: Pictures here

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Old 06-07-2012, 01:50 PM   #7 (permalink)
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Alright, so the pistons and exhaust valves the only differences I have to worry about?
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Old 06-07-2012, 02:04 PM   #8 (permalink)
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Alright, so the pistons and exhaust valves the only differences I have to worry about?
As far as we can remember. Don't take everything on an internet forum as the absolute gospel truth. After you decide what parts house you're going to buy from, the smart plan of attack would be to show the parts man your list of parts, then compare to see which turbo engine parts had a different part number versus non-turbo. In other words a rings set for both engines are going to have different numbers.
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Last edited by LMJD; 06-07-2012 at 02:08 PM.
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Old 06-07-2012, 02:08 PM   #9 (permalink)
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Good advice. Also don't order any rings/pistons or bearings until the engine is torn down and precise measurements taken, ie cylinder taper, journal diameter, etc. You may find the pistons are okay and only need rings.


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1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually Photos
ATS Turbo upgrades: 3" DP with 3" exhaust Magnaflow XL muffler: Pictures Here
2012 Copper Canyon 273 FWRET w/2 slides, Air Lift 5000 bags
Pillar pod: Autometer C2 Series gauges: pyro,trans, boost, water, oil pressure
Hypermax Cowl induction, K&N air filter, flex-a-lite 26K trans cooler with fan,Tekonsha prodigy
Train Horns: Pictures here

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Old 06-07-2012, 02:11 PM   #10 (permalink)
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Alright, I checked into gettin the mahle pistons and republic diesel out here in louisvile has them so ill have them help me get everything I need. I appreciate the help guys, thanks
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Old 06-07-2012, 02:21 PM   #11 (permalink)
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As Chuckster just posted (good advice again) I sure wouldn't order spendy pistons unless you check yours out first. By reading your first post, yours may be OK. Plus you don't know if you have standard or oversize bore.
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Old 06-07-2012, 07:11 PM   #12 (permalink)
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Yea, I will definitely tear the engine down and before I order anything. But since this is my first diesel and I've only rebuilt 350's and 305's in the past I wanted to learn more about it before I started on it.
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Old 06-10-2012, 09:13 PM   #13 (permalink)
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Hey if your looking for the gasket rebuild kit wise, i might suggest National Parts Depot. They have great parts at pretty good prices!!!! Best of luck on the rebuild!!
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Old 06-12-2012, 07:35 PM   #14 (permalink)
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http://www.google.com/url?sa=t&rct=j...WxhYmnkNmv_T7Q

check out page 23.

if the link does not work, google
"939473IDITurbochargedDieselEngine"
and download the pdf...hope it helps, either way its a nice doc .
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Old 06-12-2012, 09:54 PM   #15 (permalink)
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Thanks. I looked it over and that will help a lot. I appreciate it

1994 f250 7.3 idi turbo, ext cab, long bed, 4x4, E4OD
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