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  1. J

    Resealing plate behind water pump

    Take the whole cover and pump off - this way you can seal it properly. You can remove the lines, pump to gear bolts & pump to housing bolts and just slide the pump back without actually taking the whole thing off. But, the injection gear cover and gear needs to come off. Once you have the...
  2. J

    Electric cooling fan

    I would go for about a 205-210 on and 190-195 or so off. The thermostat is fully open at 192, but starts to open earlier. I see normal cruise temps around 185. You do want to make sure your low temp on the switch is higher than normal running temp so the fans actually shut off. I prefer to...
  3. J

    1985 Dual Range operation?

    You sure about this? You have 3 speeds? GV is slick on their advertizing - it's a direct/over box, not over/under. You physically cannot get an over & underdrive out of a GV style gearset. You can do over/direct or under/direct but not both. Only way to do that is a brownie box. For the...
  4. J

    Aftermarket fuel gauge

    I'm fond of isspro gauges - good quality, no excess fluff and good support. That being said, the gauge is rarely a problem on these trucks, usually it's sensor or tank switch valve. I have had good luck replacing the sensor with a generic aftermarket setup though - no need to mess with...
  5. J

    86' 6.9 I need a tach!

    I have the circuit card if anyone needs one. I think all 84+ trucks have the wires already run, you just need the tach and sensor. As for aftermarket, I am fond of the Isspro programmable type. They seem to want a higher input voltage than the stock tach, so you need a good sensor but...
  6. J

    Powerstroke electric vacuum pump.

    When I did mine I wired it off one of the fan wires so the pump only came on with the HVAC system since that's all it's used for. (cruise is a later full electronic unit) On 84-86 rigs the wire you want is the orange or brown/orange going into the blower motor. This wire will have +12 anytime...
  7. J

    DO NOT BUY!!!!!

    Have you contacted the seller to advise them of the error? I note it's been re listed since your original posting....
  8. J

    Slow starter quick fix??

    Might be able to replace the bushes, but likely there's other problems too, and that's a lot of work to put into something that may or may not work. For the price just get a new one. If time is an issue you can always get one from the local parts store. I've actually had good luck with autozone...
  9. J

    Too much return fuel?

    Probably should run a dedicated return line. Problem is going to be switching tanks - you'll need another switch valve. Any increased pressure in the return lines is going to cause leaks and running issues. One of the few failsafe ways of killing an idi is the clamp the return line off the...
  10. J

    crank bolts

    If you drill them get the best drill bits you can find new. Be very very careful to keep the hole centered and straight. First thing I would try I think is welding a nut onto the broken surface and pulling it out that way. Should be a big enough bolt that this would be marginally doable...
  11. J

    1983 over 8500lbs brake booster with dual piston. Does it even exist?

    Is there a difference between an 83 and the later trucks? I didn't have any trouble getting one for my 85 a few years back. Try rockauto? Or do a hydroboost swap and get rid of the problem...;Sweet
  12. J

    Electic Fan Clutch

    Finally got around to putting up a post on my latest project - an electric fan clutch. Research has shown that the idi fan clutch uses a 1.25-16LH thread. This is finer than a standard UNF, but is still a UN type thread, (dimensions can be found here for reference) which is the same thread...
  13. J

    Transfer case question

    1) Regearing the t-case would be difficult. To the best of my knowledge there are no gears for it. If you do have that much of a concern with super low gears I'd say run some sort of a t-case doubler or atlas case like they use on rock crawlers.... stupid expensive though. I think the 1345 is a...
  14. J

    Chealsea PTO?

    My understanding is that the 6 bolt PTO opening and bolt size is standard, as it the overall design of the housing, etc. (within a particular series/manufacturer) However, the gear size, number of teeth, pressure angle, etc are all specific to certain transmissions, and even ratios. A ZF5-S42 &...
  15. J

    Link to TSBs and wiring diagrams

    Diagrams are not very complete though. Decent info, but it looks like it's only about 10% of the wiring. At least for 86.
  16. J

    zf5 tail shaft housing question

    I'm fairly sure the rear section of the housing is the same for gas & diesel, it's the bellhousing (ie front half of case) and gearing that's different. So you may be about the swap a gasser rear housing on, but that involves total disassembly of the trans, and from what I understand these are...
  17. J

    Engine won't shut off while headlights are on

    Ground problem. I have a wiring diagram, PM me your email.
  18. J

    Killer deal on NEW starters!

    Interesting. Curious how well it holds up..... looks like a clone of the Mitsu unit, but I wonder what they skimped on. One thing to note about a reman unit is that the core parts (ie wiring on the armature, design, shafts, etc) is OE quality though some of the wear parts may be cheaper junk...
  19. J

    Introducing TOTAL MOOSEPOWER!

    Apples and oranges - You're discussing the cost of a rebuilt high power older generation motor against the cost of a newer truck that's just as likely to have problems as your current idi. And the newer you get, the more complex and expensive things are to repair/replace. I would bet that a...
  20. J

    $4000 for an engine install?

    Something worth considering - are you **sure** they understand it's a 7.3 IDIT and *not* a 7.3 Powerstroke? $4000 plus the wiring and firewall comments make me think that may be the case - and that seems entirely possible if all they have is your "hey, I found a 7.3 turbo motor, what would you...
  21. J

    Ford service manual

    My $0.02.... 1) Unless you have an E4OD or plan to do a trans rebuild I submit that the Haynes manual is sufficient. The engine info is directly from the Ford book and sufficient for an engine rebuild. Most of the other mechanical stuff is pretty generic. Really don't need too specific of...
  22. J

    Ford service manual

    The Haynes manual is decent and probably the cheapest/quickest way to go IMHO. The 80-97 truck manual covers the chassis, and the diesel engine manual covers the motor. The diesel engine manual is basically a reprint of the Ford manual, though missing a few things IIRC. Chilton manual is...
  23. J

    bolt pattern

    Haven't had much trouble with 16.5s myself - not as many choices as 16" sure, but when I needed new tires on short notice last summer I was easily able to find a set in stock at the local tire mart (or whatever chain store it was....)
  24. J

    Injector Code Comparison

    I applaud the effort, but unfortunately very little of that really matters. What really matters with the injectors is the pop pressure (which can be measured and adjusted) and the size/shape of the pintle and nozzle, which is very difficult to quantify. Moreover, the interaction of the injector...
  25. J

    banks sidewinder rebuild?

    ~0.030" side to side play is normal. Axial play should be minimal. I have a low mileage Sidewinder turbo that would be a good doner for a center section swap if you wind up wanting to do that.

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