Search results

  1. J

    6.9 rebuilding tips

    I wouldn't worry too much about it. A 0.020" increase in recession (assuming it's that much for every valve) drops the CR about 0.7 - 21.5 to 20.7 according to my math. There's some estimation in that, but bottom line is not a huge difference and will actually be a bit better for turboing...
  2. J

    I want to finally get Gear Vendors unit, have questions though.

    The lockup is a hydraulic clutch within the TC. It's electronically controlled through a solenoid valve, thought typically with hydraulic interlocks as well. Pressure come from the main front pump that also supplied all the other hydraulically actuated clutches & brakes within the trans. The...
  3. J

    6.9 rebuilding tips

    Press in jets are not a huge issue, but you need to be careful removing and fabricate some tooling for install. Somewhat more risk in that you need to double check aim, but not impossible and wise to do even with bolt in. Update the rockers to 7.3 style (no bridge). Personally, I do not feel...
  4. J

    transfer case 4407 vs 1356?

    Only problems I've heard of on a 1356 stem from the poor pump design and loss of lube oil pressure with the pump spins, and that's a fairly easy flaw to fix. Other than that no reason to mess with a swap.
  5. J

    Are O'Reilly Masterpro V belts any good?

    IMHO, pretty much all the off brand cheap parts store stuff is emergency use only, i.e. masterpro belts. Go to rock auto and get better stuff for far cheaper. I've had no significant issues with any of the name brand belts off there. 36 vs 38* belt probably doesn't matter - that small of the...
  6. J

    '84 6.9 piston cooling nozzles

    Sort of. SN 237016, which I believe is somewhere in the 86 year model. https://www.oilburners.net/threads/6-9-serial-number.82043/
  7. J

    '84 6.9 piston cooling nozzles

    Don't rush to scrap it. The Jets can be pulled and re used. Use a pair of good vice grips to grap the body right at the block and then use a pry bar to pull them straight out - don't wiggle or pull at an angle. They should come out ok. Fairly easy to reinstall too..... Take a long 3/8 ish bolt...
  8. J

    Camshaft possibilities?

    Pressurized intake means the cam matters quite a bit less because the greater pressure differential makes the exact flow Dynamics less critical - same reason a tuned intake is less important. Also, the lower RPM helps make it less sensitive. Keep in mind also that the piston/valve clearance...
  9. J

    20-50w oil

    The viscocity change wolnt make much difference, and the lack of a diesel rating will absolutely screw you. Non diesel rated oil will become acidic quickly from the dirty blowby (true of all diesels, not just idi) and cause way more damage than the problems you want to 'fix'
  10. J

    US Gear exhaust brake

    Keep in mind that an auto 12V system is much dirtier and more prone to voltage spikes, etc. than industrial or most electronic systems. I would go with the industrial automation relay over a microprocessor based Chinese circuit card. If nothing else it's at least sealed. Why are you not...
  11. J

    Twin Pyrometers?

    Doubt it will make any noticeable difference. Twin pyro wouldn’t hurt, but a single is probably fine. If you really want to do it right out one on each cylinder and feed it into an auto logging system to give you an average and max delta value.
  12. J

    Reduced compression

    Best solution is probably just to have the pistons milled. Plenty of thickness to take a bit off without issues, and ceramic coating will help with gear flux
  13. J

    Rebuilt 0 mile 6.9, $1950, PNW

    Fresh rebuilt Ford/IH 6.9 diesel long block / 90% complete engine. $1950. Seabeck WA. Late 84 block (sn 105xxx) Bored 0.040 over New main, rod & cam bearings New pistons & moly rings New lifters Good used late model (steel bridge) rockers. Rebuilt heads w/bronze guide liners, new exhaust valves...
  14. J

    Idi Reman engine supplier options

    I’ve got a rebuilt 6.9 long block+ for sale if you’re interested in going that route. In WA.
  15. J

    School me on the F-Superduty

    Yes, but IIRC it's also the same axle with the same ratio options. My thought was that the OP was referring to a 99+ F450 axle.
  16. J

    School me on the F-Superduty

    Pretty sure the lug pattern is different on the newer axles. Other than that likely spring perch, shock and yoke differences. Not impossible, but likely easier and cheaper to regear what you have.
  17. J

    School me on the F-Superduty

    Realize also that they are in the medium duty truck category (class 4) which has significant registration and insurance impacts. Could get around that by using a f350 cab and registering it under that vin, although there some legal grey area there and you’d also still technically be limited by...
  18. J

    1986 1 ton GVWR?

    3/4 ton, 1 ton etc. are nominal ratings. GVW minus light is the real payload, typically considerably more than nominal rating. 8600 gvw is a 3/4 ton. 8800 for reg cab or 9000 for ext cab is a 1 ton. No real difference other than nominal class. (Heavier 1 ton ratings are different) insurance...
  19. J

    7.1 IDI???

    1/2 is 13 threads/inch, 7/16 is 14..... so you could drill it partially out and retap with 1/2-13 tap, but it will be a ugly messy thread that's not right and not as strong. Only way around that would be an insert/heli-coil which probably requires drilling out enough to overly weaken the...
  20. J

    7.1 IDI???

    6.9 with 1/2 studs is not realistically possible. Not enough meat to drill and rethread the block. Sleeving and bore to a different diameter is not hard, and easy to make reliable. Hard part would be finding pistons. 7.3 block sleeved to 6.9 would make some sense, although I’m not sure it’s...
  21. J

    Early Banks, water cooled turbo

    I suspect you wound up with someone’s project and that’s not oem banks. Not sure, but I’d bet you can pretty easily assemble a wc t3 housing with the banks housing and make what you have there. Having never heard of a banks using wc turbo and the water side plumbing in the pic sure looks like...
  22. J

    Fan clutch upgrade...

    What are you using for sensors? I was going to built something using LM34's either open or potted in a brass fitting but haven't gotten around to it. Nice thing with the LM34 is it will give you a direct reading in mV correlating to the temp, so it's easy to read.
  23. J

    Am I dead in the water

    Something to be cautious of, but not too hard. Clean thoughally before pulling the gear cover, then just use good work practice and clean away from the opening. Any small amount of debris that does drop in is very unlikely to cause any damage - it will drop down into the oil pan and unless you...
  24. J

    Am I dead in the water

    Pulling the injector pump gear cover is 100% possible without pulling the front cover, just requires care. Rotate the engine to #1 TDC, verified by looking at rockers or injection pump drive pin. Remove injection pump from gear & cover. Remove injection pump gear and cover. Look closely...
  25. J

    glow plug drilling/extraction

    I suspect that the actual heating element isn't going to drill worth a darn - I'd expect it to either fracture and come out in chunks or just be impossible to drill. Keep in mind too that as soon as you start drilling/moneying with it you have a good chance of getting it torn up enough to no...

Latest posts

Forum statistics

Threads
92,932
Posts
1,155,143
Members
26,432
Latest member
pwillis

Members online

Total: 808 (members: 7, guests: 801)

Share this page

Top