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  1. TahoeTom

    VC Gaskets & Returns W/ Turbo

    The manual has torque of 6 ft/lb in a clockwise line pattern starting at intake left side.
  2. TahoeTom

    Advice On 6.9 Overhaul

    https://www.rockauto.com/en/moreinfo.php?pk=3646872&cc=1123928&pt=5620&jsn=688 I might be late to the party. Just checked Rock Auto and they have Mahle .040 oversize in stock. They seem to come and go, in and out of stock. I was stuck last year with no oversize pistons available. I kept checking...
  3. TahoeTom

    Hard start, new DB2 & new fuel lines on back end of lift pump.

    You said hard starting when cold. When warmed up it should start instantly. If so maybe check your glow plugs. Warmed up could mask air intrusion. The return line system seems to leak if you disturb it. Get some viton Orings from Mc Master Carr. I usually can reuse the caps and lines after...
  4. TahoeTom

    Small coolant leak on driver side leaking down to slave cylinder (see photos) where is this coming from?

    Could be head gasket. Are they original? 6.9s have the coolant ports in rear corners. I have experienced this myself. Also 6.9 have open coolant ports on head that are sealed by the valley pan and some sort of sealant. The 7.3 eliminated those by using cup plugs. The head/valley pan ports would...
  5. TahoeTom

    How bad is the HG job on a 7.3 IDI?

    Tap around the sleeve with a hammer. The sleeve will stretch and expand enough to be removed. Just enough to expand sleeve and not damage crank.
  6. TahoeTom

    7.3 IDI Block Deck Flatness / Trueness Spec

    They are Mahle for 6.9 IDI. The 7.3 Pistons look different.
  7. TahoeTom

    7.3 IDI Block Deck Flatness / Trueness Spec

    Check valve recession in head. Russ (RIP) recommended near the max of .050 intake and .060 for exhaust. I think that is what bit me on my last rebuild . my pistons were not destroked and I had valve to piston contact on all 8. I used the Victor head gaskets. I currently have the max recession...
  8. TahoeTom

    Need advice on battery cable replacement kit

    https://classicdieseldesigns.com/products/7-3-6-9-idi-oem-replacement-battery-cables?_pos=1&_sid=fbd461e78&_ss=r CDD sells a set also.
  9. TahoeTom

    Battery Cable Routing...

    NAPA batteries are 27 for pass side and 27F for drivers side. All terminals toward firewall with negative to outside.
  10. TahoeTom

    Clutch Fork Interchange

    I bought one on ebay supposedly for my era truck. Part # was E4TA rather than E6TA and the pivot point was in a different place so I returned it. I dug through my parts stash and actually found one with a lot less wear than my original, so I think I am good for awhile. I was in an accident years...
  11. TahoeTom

    6.9 return line

    6.9 return lines use 3/16 id hose (about 5mm). 7.3 return lines use 1/4 id (about 7mm) Depends on which system you are working with. Either early 6.9 or later 7.3 return can be used but cannot mix the two. Most auto parts stores should have either size with 1/4 the most common. If you need 5mm...
  12. TahoeTom

    Clutch Fork Interchange

    I have a T 19 transmission and my clutch fork has a lot of wear where it rides on the TO bearing. Rock Auto doesn't have a listing for '85 or '86 trucks. Part # E6TA 7515AA. I found listings for later trucks with ZF 5 trans. Will the ZF 5 clutch arm work on T 19? Ford part # is slightly...
  13. TahoeTom

    1986 F250 6.9 IDI Turbo Kit recommendations

    I have a Hypermax Pulse kit with a cowl intake. The most boost I have seen is 7 lb so not a concern with stock head bolts, though I have ARP studs. It helped my truck climb the grades around here in the Sierras without a huge smoke show. There is no wastegate on these. I like the fact that the...
  14. TahoeTom

    Good online source for cylinder head?

    I used Quality Diesel Machine in West Sacramento. They were familiar with IDI diesels. Could drive there rather than ship to Wyoming.
  15. TahoeTom

    7.3 IDI Mild Build going in a 1986 F350 thread

    If the 6.9 crank is good it would be a better option than turning down the 7.3 one
  16. TahoeTom

    Starting without glow plugs.

    Not serious, just thought it was worth the entertainment value.
  17. TahoeTom

    First engine rebuild

    The cup plugs on the front deform when installed and need to be replaced with new ones. The old ones will no longer be an interference fit. My block came back from the machine shop with those removed and they provided new ones that were not going in without a lot of force. I ended up driving...
  18. TahoeTom

    Rebuild or replace motor? New project - 1985 F-250 4x4 6.9 with Banks, T19, and GVOD.

    Remove trans, starter, oil filter, radiator, core support, bumper, hood. You can pull hood back with limiters removed. Some remove entire front clip. Need to get front end down as low as possible.
  19. TahoeTom

    Accurate Diesel - ‘86 6.9 Glow Plug Controller Upgrade

    I think that is the controller I bought years ago. I only use it as a plug in the head but it has the harness attached. I use a push button to glow the plugs. I tried it out thinking if I left my truck at the tire shop or other place long enough the folks there wouldn't know how to start it. I...
  20. TahoeTom

    Could Someone Explain How These Valve Stem Seals Are Supposed to work

    They just divert oil away from the guide like the name umbrella. I looked at CDD store and he said the positive seal on all valves reduces blowby and carbon buildup. I wonder if the guide needs some lubrication so the umbrella was the answer the engineers at IH came up with.
  21. TahoeTom

    Could Someone Explain How These Valve Stem Seals Are Supposed to work

    The white seal called an umbrella seal snaps into the upper spring retainer. They only go on exhaust valves. I think if used with the larger intake seal it will interfere with that seal. No idea why there are 16. Classic Diesel Design sells a set 16 seals like the intake seals so I assume you...
  22. TahoeTom

    Would This Be A Good Engine For A Rebuild Project?

    If the 6.9 is an 1984 it will have pressed in piston cooling jets/nozzles. That is a deal breaker as a candidate for a rebuild. The bolt in nozzles were an upgrade that allowed the removal and replacement of the nozzles. Pressed in replacement nozzles are NLA and expensive if you can even find...
  23. TahoeTom

    Would This Be A Good Engine For A Rebuild Project?

  24. TahoeTom

    Installing new Injection Pump and Injectors. Install new Hyd Lifters at same time?

    Here are a couple of pages from the instructions that came with my valley pan years ago. Sealing coolant ports with the valley pan plus sealant seems lame to me. The 7.3s head design is improved with cup plugs sealing those open ports . Those helper gaskets you found look like a good idea. At...
  25. TahoeTom

    Installing new Injection Pump and Injectors. Install new Hyd Lifters at same time?

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