Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

OBS 7.3 Build

Thread Tools
 
Search this Thread
 
Old Apr 9, 2016 | 03:34 PM
  #1  
0500757Arf's Avatar
0500757Arf
Thread Starter
|
Senior User
Joined: Oct 2015
Posts: 295
Likes: 0
OBS 7.3 Build

So I got the motor out of the project truck and now it's time to overhual/upgrade it and wanted to get some opinions from guys who have possibly done the modifications I'm planning on doing and or input on what else I should be doing while the motor is out and is easy to work. Gonna start with the general maintenance stuff then go into the performance assepect of the build so here we go!

General Maintenance/Repairs:

New Oil Pan (Spectra)

New Dip Stick Flange/O-Ring (Dorman)

New Oil Cooler/Gaskets (Dorman)

New Timing Cover Gaskets (Felpro)

New LPOP (Melling M208 or ENGINETECH EP208)

New Front Crank Shaft Seal (National)
**Just gonna do the front seal for now cause not sure if the rear is actually leaking or not because the HPOP gasket was leaking oil into the valley and they valley drains excess oil to the back of the motor making it appear as if the motor has a bad rear main seal. Once I get it running and driving again will pop the bottom cover off the transmission and determine whether I need to do that rear main seal or not**

New Water Pump/Gasket (Gates)

New Thermostat/Gasket (Gates)

New Temperature Sender (Standard)

New Coolant Hoses (Gates)

New Harmonic Balancer (Dorman)

New Camshaft Position Sensor (Dorman)

New Engine Oil Pressure Sender (Unknown At This Time)

New Engine Oil Temperatur Sender (Unknown At This Time)

New EGR Line (Dorman)

New Exhaust Manifolds/Gaskets (Dorman)

New Up Pipes (Dorman)

New Y Pipe (Dorman)

New Turbo Gaskets (Felpro)

New Mechanical Fuel Pump (Spectra)

New Banjo Bolt Gaskets (Unknown)

New Fuel Bowl Heater (Standard)

New Water In Fuel Sensor (Standard)

New Rubber Fuel Connection Hoses (Connecting Fuel Pump and Filter Housing)

New HPOP Rail End Cap O-Rings (Riffraff Diesel)

New Valve Cover Gaskets (Dorman)

New Gas Tanks (Dorman)

Performance:

Baby Swamp Injectors w/ 6 position switch (XDP Diesel)

Beans D66 w/ 1.0 Housing (Beans Diesel)

3" Down Pipe (Diamond Eye)

Intercooler (Banks)

Mishimoto Radiator (Online)

Boost/Pyro/Fuel Pressure Guages (Unknown)




Any other area's of prone failure on these motors that I missed and should take a look at/fix while the motors out? What do you guys think of the set up? Not going power crazy as it's getting put on 40's and no "Racetrucks" run 40's...just a little bit more power then stock to help turn those big 40's. Let me know what you guys think of this rebuild/power upgrade plan!
 
Reply
Old Apr 9, 2016 | 09:52 PM
  #2  
Diesel_Brad's Avatar
Diesel_Brad
Fleet Owner
15 Year Member
Photogenic
Liked
Loved
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
Do NOT use the dorman CPS or their crap valve cover gaskets. Get them right from FORD
 
Reply
Old Apr 9, 2016 | 09:57 PM
  #3  
0500757Arf's Avatar
0500757Arf
Thread Starter
|
Senior User
Joined: Oct 2015
Posts: 295
Likes: 0
Alright camshaft position sensor and valve cover gaskets will be coming from the local ford dealership. Those the only things that NEED to be from Ford?
 
Reply
Old Apr 10, 2016 | 07:41 AM
  #4  
Lead Head's Avatar
Lead Head
Lead Driver
15 Year Member
Photogenic
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
Why would you do all that work with the engine out and not replace the rear main seal!?


...and EGR line? You don't have an EGR.
 
Reply
Old Apr 10, 2016 | 11:09 AM
  #5  
0500757Arf's Avatar
0500757Arf
Thread Starter
|
Senior User
Joined: Oct 2015
Posts: 295
Likes: 0
Originally Posted by Lead Head
Why would you do all that work with the engine out and not replace the rear main seal!?


...and EGR line? You don't have an EGR.
Cause the way the oil is around the back of the motor looks to be all oil that leaked down from the valley. All the oil is to the one side of the back of the motor where the drain hole is so I'm thinking it actually isn't bad. But if the seal is indeed blown I will be replacing the trans at some point and will just replace it when the trans is out. I'm talking about the EBP line on the front of the motor that comes off the passenger side exhaust manifold up the to the back of the HPOP. The lines pretty rusty and could use replacing.
 
Reply
Old Apr 10, 2016 | 11:55 AM
  #6  
Lead Head's Avatar
Lead Head
Lead Driver
15 Year Member
Photogenic
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
So what if you can't decisively conclude if it's actually leaking?

You're saving $30 and an hour of your time now, only so you can later spend the same $30 later. Except later the engine won't be conveniently on a stand, and you'll be lying on the ground at an awkward angle trying to chisel the wear sleeve off the crank for 3 hours.

You said in your other thread that this was a perfectly running engine before you pulled it. This means you're replacing a ton of other things on this engine that are working fine and don't need replacing - like the oil pump, harmonic damper, fuel pump, etc...

It would just be stupid to not change the rear main seal, considering all the other work you're doing, and the fact that you're changing the front seal...
 
Reply
Old Apr 11, 2016 | 09:02 PM
  #7  
0500757Arf's Avatar
0500757Arf
Thread Starter
|
Senior User
Joined: Oct 2015
Posts: 295
Likes: 0
Originally Posted by Lead Head
So what if you can't decisively conclude if it's actually leaking?

You're saving $30 and an hour of your time now, only so you can later spend the same $30 later. Except later the engine won't be conveniently on a stand, and you'll be lying on the ground at an awkward angle trying to chisel the wear sleeve off the crank for 3 hours.

You said in your other thread that this was a perfectly running engine before you pulled it. This means you're replacing a ton of other things on this engine that are working fine and don't need replacing - like the oil pump, harmonic damper, fuel pump, etc...

It would just be stupid to not change the rear main seal, considering all the other work you're doing, and the fact that you're changing the front seal...
You do have a good point, guess I'll put the rear main seal on the list of things to do while it's out to save me some time and effort in case it is indeed bad. It's funny how prior to pulling the motor I had a parts list of all the stuff I was going to replace and that list has multiplied by 3x at lease since
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jeepincj7
1994.5 - 1997 7.3L Power Stroke Diesel
19
Nov 10, 2012 03:37 PM
80351
Maryland Chapter
6
Jun 17, 2010 08:34 AM
Red Cobra
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
4
Sep 14, 2009 10:16 PM
DanMan7
1973 - 1979 F-100 & Larger F-Series Trucks
12
Jun 23, 2007 11:47 PM
1ole4d
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
4
Sep 4, 2002 11:51 PM




All times are GMT -5. The time now is 07:16 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE