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  1. Jim993

    Anyone done a large aux c6 trans cooler?

    I have had a tube and fin type on my '85 6.9 Banks turbo C6 for about 15 years, in front of the condenser. Mine measures 13" wide by 9" high. Coming across the desert in August through Needles at 108 degrees F outside and up several long grades into Arizona, transmission temperature got as high...
  2. Jim993

    C6 fluid change advice?

    My '85 F250 4 x 4 C6 has 270,000 miles on it and is fine. I have used Red Line D4 full synthetic ATF since 1998 when I bought the truck at 140,000 miles. Not long after I added an external transmission fluid filter in the hot fluid line from the transmission to the radiator cooler AND a big...
  3. Jim993

    Tips to: tighten/loosen through bolt solo?

    I use Gorilla tape to tape a box end wrench on the side difficult to get to, usually up against something to keep it from turning, but most times Gorilla tape alone does the trick.
  4. Jim993

    Thread locker orange vs blue for fan clutch

    The reason the fan clutch is LEFT hand threads is so it won't come off. Any kind of thread locker will make removal MUCH more difficult the next time. My '85 Factory Service Manual (Engine)(6.9) says nothing about thread locker for re installation of the fan clutch assembly onto the water pump...
  5. Jim993

    Anti Cavitation test strips and bottles where to get these days?

    I've been using acustrips for over 20 years. I make them last at least three years by keeping them sealed in an airtight container, in another air tight container -- double sealed.
  6. Jim993

    R-134 accumulator?

    My truck was converted from R12 to 134a in Spring 2020. Same condenser, new compressor (old was leaking) and new dryer. Works great. August 2020 we drove from CA to AZ, 109 degrees at Needles hauling 1000 pounds in the bed. We were and are cool in the truck..
  7. Jim993

    C6 no shift

    PS in my view, every diesel should have a vacuum gauge in the cockpit.
  8. Jim993

    C6 no shift

    Got vacuum? It won't shift normally if the belt driving the vacuum pump breaks, the vacuum pump dies, the vacuum adjusting valve up by the IP is defective, a vacuum line gets interrupted or the vacuum modulator on the transmission goes bad.
  9. Jim993

    First start after swap..Sealing water pump and bolts

    I would do it one bolt at a time. Have a same size bolt ready to lightly screw to keep the coolant in while you put sealant on the bolt you just removed, then switch to the sealant coated bolt. You will lose a little coolant at each bolt, but not much.
  10. Jim993

    blinker fuse keeps blowing

    I had a similar problem a few years back. After a lot of diagnostic work found nothing. Then I remembered that I replaced the ignition switch about a month before and everything worked fine after that replacement-- until three weeks later the turn signal fuse started to blow. Checking the...
  11. Jim993

    C6 trans temp?

    Transmission temperature gauge-
  12. Jim993

    C6 trans temp?

    The green band on my F250 4 x 4 Banks transmission temperature gauge starts at 170 and goes to 240, yellow starts at 240. Yellow is from 240- 260, then red. Top of red is 320.The Banks gauge sensor is on the hot fluid line from the transmission to the radiator. Fluid then goes to the auxiliary...
  13. Jim993

    Steering wheel just fell into my lap.

    Just looked on eBay, looks like there is one: https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313&_nkw=%2787+F250+steering+parts&_sacat=0
  14. Jim993

    any 6.9 fuel water separator alternatives?

    Mine was bypassed 23 years and 120,000 miles ago. Fuel only goes through the stock 6.9 filter. No issues. I do change filters every 15,000 miles and look for water at that time. Never have seen any. I also use Stanadyne fuel additive on a every three month or so interval and the truck is...
  15. Jim993

    Damage inside differential, what to do next?

    I agree, you probably have it back together by now, but if not, just make sure that the differential cross pin is secure before putting it back together.
  16. Jim993

    Tachometer questions

    I don't know the answer, but if your stock tack is not working, the usual culprit is the sender on the cam gear housing. $75 +-
  17. Jim993

    Lets play guess that sound!

    Diesels take a long time to warm up because the pump air wide open, no throttle blades restricting flow, especially in winter and if you are using cabin heat. You will see cross country truckers with canvas covers over their radiators in winter to keep engine/ coolant temperatures up. 185- 190 F...
  18. Jim993

    Project Baby Blue

    Good job on the restoration. Here is my Midnight Blue project-
  19. Jim993

    Oil in Coolant

    Oil cooler failure is often the first sign that coolant has gotten acidic and corroded the relatively thin oil cooler tubes. A bit late, but start monitoring coolant condition with coolant test strips so that you do not have to do head gaskets. Consider adding a coolant filter with coolant...
  20. Jim993

    Newb with '87 6.9L

    In my view it is unwise to not monitor coolant condition. Diesel engines, because of their very high compression and combustion pressure are much more prone to allowing a few molecules of combustion gasses past the head gasket on the power stroke at high throttle settings. Combustion gasses...
  21. Jim993

    Burn at yellow wires of big connector.

    I added a section of heavy yellow wire and used wire nuts and dielectric grease for the connections on mine about ten years ago. No issues since.
  22. Jim993

    Belt Loose, also anyone hear a knock?

    Sounds fine to me. The alternator belt needs to be tensioned. Loose belts are subject to being thrown off the sheaves. I use this tool to check belt tension: https://www.ebay.com/itm/324740640326?hash=item4b9c0cee46:g:NRMAAOSwiOBhCyLG Belt tension should technically be 72 pounds using the...
  23. Jim993

    Oil Gauge Reading LOW

    I don't know about a '91, but the Banks conversion for my '85 relocated the oil pressure sender unit to the top of the turbo. That introduces even more error to the OEM oil pressure sender because the new location is measuring oil pressure at the turbo but there is line loss caused by oil...
  24. Jim993

    Inline filters.

    I do not understand why some install inline filters. I have run my truck for 23 years so far with ONLY the factory spin on filter on the passenger side of the engine. I do change that filter every 15,000 miles.
  25. Jim993

    How hot is too hot?

    I am not sure of the load you are pulling and maybe I missed it, but the first thing I would take a very close look at is the radiator. Have a radiator shop take upper tank off, tubes all clear? If they are clear, a bigger radiator may be needed. Last August I drove my '85 F250 4x4 C6 from CA...

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