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  1. MasterChiefIDI

    2026 Best Oil Filter for the 7.3 IDI?

    I was wanting to know what oil filter do you use for the 7.3 IDI? For reference, the factory FL784 filter was rated for like 30 Microns nominal... Looking for something finer. Has anyone used the Baldwin B7513 that has a Micron Rating of 3 Nominal; 10 Absolute? Would a rating like this...
  2. MasterChiefIDI

    Lip of sleeve at bottom of cylinder

    Today I was assembling my motor when I noticed I have a somewhat sharp edge on 3 of my 8 sleeved cylinders. pressing a feeler next to this edge/lip I estimate it's about .010" maybe less. My machinist previously stated he added a 5/16 shoulder at the bottom of each cylinder for the sleeve to...
  3. MasterChiefIDI

    WARNING about King Main Thrust Bearings

    I wanted to share an important "heads up" regarding King main thrust bearings that have been produced since 2024. Engine Tech branded 7.3 IDI main bearings are in fact King bearings just repackaged by Engine Tech FYI. I received a set of Engine Tech Mains from my machine shop a year ago and...
  4. MasterChiefIDI

    Samco Sport Silicone Radiator Hose Reviews

    Hi, has anyone used the Samco Sport silicone radiator hoses for the 6.9 and 7.3? Seems Samco radiator hoses last almost forever. I am planning to run Evans coolant and like the idea of hoses that will last as long as the coolant will ha. See below link...
  5. MasterChiefIDI

    Valve Recession and Fel-Pro's head gasket..

    Hi, I was wanting to see if someone could help me with a technical question. I am in the process of assembling my 7.3 idi and am taking protrusion measurements and valve recession measurements. For background, deck was decked .011" and I am using Mahle's .010" reduced pistons. I am using R&D's...
  6. MasterChiefIDI

    F350 80-86 Fuel Selector Valve Connector replacement

    From what I have read, it seems it is nearly impossible to find a replacement connector for the bullnose 6 port FSV but thought I would ask in case a solution exists.. Does anyone know where I can find this connector? Is there anywhere else in Ford's vehicles from that time that used this...
  7. MasterChiefIDI

    6.9 vs 7.3 idi oil fill/injection pump cover change

    Hi, I was wondering if anyone knows why IH changed the oil fill/injection pump cover design on the idi? I have one of each of these covers and trying to decide which style I want to use. I see the 7.3 has cast lugs on the back side but am unsure their purpose. was the 6.9 problematic? A small...
  8. MasterChiefIDI

    E350 Saginaw pump bracket - wanted

    I am looking for the below Power Steering pump bracket that is only found on the E-series Econoline vans with the V-belt 6.9 or 7.3 idi engines. Please let me know if you have one you're willing to part with.
  9. MasterChiefIDI

    7.3 IDI Block Deck Flatness / Trueness Spec

    I have been looking all through my service manual and cannot find the Block Deck Flatness spec anywhere. Can anyone provide me what the max clearance should be when checking with a straight edge? I am trying to determine if my deck is acceptable or if I need to resurface it. Any help is appreciated.
  10. MasterChiefIDI

    7.3 IDI Thicker Head Gasket Source other than Fel-Pro

    I was trying to find out if anyone knows why I could get my hands on an extra thick head gasket for our engines? .020-.030" thicker than stock? I received back my block from my machinist after putting 8 sleeves in it and decked .007" off block. Was planning to use fel-pro gasket (.010" thicker...
  11. MasterChiefIDI

    7.3 IDI Bore or Sleeve?

    My NA 7.3 idi for my mild turbo build seems it will need a .030" over bore to clean up. The block is rust free, pressure tested, and all head bolt threads intact. Researching it seems most advise against boring this motor over due to cavitation. Is the cavitation concern blown out too much or is...
  12. MasterChiefIDI

    7.3 IDIT Turbo Exhaust Valves source

    I am looking for a source for 7.3 idit turbo exhaust valves. Does anyone have any leads or P/N? Building my NA heads back with turbo parts. Greatly appreciate any help. Thanks
  13. MasterChiefIDI

    Engine bay insulation

    My factory firewall and fender insulation is deteriorated and a mouse nest on my 86 F350 6.9idi. Does anyone have recommendations for what to replace the engine compartment insulation with for fenders and firewall? I will be installing a turbo so feel I def need to add something to the trans...
  14. MasterChiefIDI

    Diesel timing adapter wanted

    Looking for a timing adapter before I spend $300 on a Gunson or Sealey unit. Anyone have one they want to part with?
  15. MasterChiefIDI

    How to install a Type4 Cam

    Hey y'all, I am looking for information on specs to consider when installing Russ's (or even R&D's) Type4 cam. I have an opportunity to purchase a type4 cam and had some questions. Mu understanding so far.. - The intakes are recessed between 0.042 & 0.054 and the exhaust are 0.051 to 0.063 for...
  16. MasterChiefIDI

    7.3 IDI Mild Build going in a 1986 F350 thread

    Hey everyone, Thought I would start a build thread for my 88 7.3 IDI mild build. Only reason I know it is from an 88 is the rod bearings are dated 9/87 ha. As some of you have already seen, the motor is going in my 86 F350 crew to replace the cracked 6.9 that's in it. PO of my truck ran...
  17. MasterChiefIDI

    Electric fuel pump really needed 7.3 idi

    I was wondering what are the benefits of adding an electric lift pump for these engines and is it really needed? Like, will the stock mechanical pump do everything I need for a mild built 7.3 with a turbo and 90cc IP? I could understand needing more fuel delivered if using a larger IP but not...
  18. MasterChiefIDI

    What to consider when building a 7.3 IDI?

    Hi, I am brand new to the forum so please let me know if I am not posting in the right place. I am looking for direction on things to consider and part/vendor recommendations for recommended upgrades to consider for building my 7.3 IDI NA. I do not know very much about building an IDI. I do...

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