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  1. 74M35A2

    Piston Rings Worn Out, Time for a Rebuild

    Everybody is saying to load it up right out of the gate. Want to chain it to my 925 and I'll hold my brake pedal half way down? That should make it fart...
  2. 74M35A2

    Up in Smoke - Not the movie, my alternator

    To make it reliable, it has to be replaced with a different design. Even the Chinese Delco clones are more reliable than the stock overheating, poorly designed unit. You should not need extra warning lights/switches/bells. Wouldn't it be nice to close the hood and not have to babysit it?
  3. 74M35A2

    Up in Smoke - Not the movie, my alternator

    Get ahold of me.
  4. 74M35A2

    Up in Smoke - Not the movie, my alternator

    The stock mil alternators do not have sufficient cooling or temperature rated electronics, especially at idle. The voltage regulator/rectifier overheats and can fail in an open, full field, or short condition. The alternator in the beginning of this thread could have had a short to ground, and...
  5. 74M35A2

    M939 Radiator Tank Gasket/Seal Source?

    So, you just cleaned the ends of the tubes?
  6. 74M35A2

    Piston Rings Worn Out, Time for a Rebuild

    We just bought two of the 30k fuel fired cab/cargo heater kits. Wild said we should install them next to each other in the bed facing rearward so it looks like an F-15 firing up (I thought that was a fabulous idea), but it probably won't propel the truck forward. So, it looks like we will...
  7. 74M35A2

    M939 Radiator Tank Gasket/Seal Source?

    What did it look like when you guys removed the side tanks? Here is what mine did, and why I bought a new one. Did you clean the tubes somehow, or just the tube ends? Needless to say, my heater core was like this also, and though it was flowing coolant fine, it was not giving off any heat...
  8. 74M35A2

    Piston Rings Worn Out, Time for a Rebuild

    He pulled the remaining 5 pistons out last night, no broken rings, and all rings were consistent with dots facing up. 2 dots on top ring, and 1 dot on bottom ring. I was wrong on my broken ring guess. I have never seen 95% leak down rate with new rings intact. Starting to look like they just...
  9. 74M35A2

    Piston Rings Worn Out, Time for a Rebuild

    Maybe it didn't like breaking in on WMO? I don't get it that #2 had 95% leak down rate, and the rings are not shattered. I just can't wrap my head around it. Your other cylinders were all over the map, from 15% leak to 95%. Maybe test your injectors once more to make sure none are leaking...
  10. 74M35A2

    Cummins 6CTA8.3 Injection Timing

    Says the guy who's engine is spread all across his garage floor. Mind you I drove my truck for an hour last night, and you worked on yours for an hour. You should put your engine parts in milk crates and then call it a crate engine. Ha ha ha! I thought you were supposed to be pulling your...
  11. 74M35A2

    5 ton Parts Quick Reference Spreadsheet

    Ether bottle replacement gasket = Zero Start p/n 8203903 (50 pack, cork), available via order through any NAPA. Source (Zero Start catalog, p103): http://www.phillipsandtemro.com/userfiles/file/2015%20Zerostart%20Catalog.pdf I see it is already in there, sorry, can move p/n to NAPA though...
  12. 74M35A2

    M939A2 Fumoto Oil Drain Valve Install

    Kind of, but you could probably stick one to the underside of the oil pan. Mine had nothing on it, so I didn't fear losing it I guess. A lot of the engine wear parts are non-mag, such as bearing copper, aluminum piston material, etc....
  13. 74M35A2

    M939A2 Fumoto Oil Drain Valve Install

    Sorry, I don't remember it. I knew you guys were going to ask it. I came up with it just using Google combined with the Zero Start catalog. That catalog is dangerous, lots of fun stuff in there. Nice block heater cord end protectors, connection plates for such, diesel fuel heaters, cab...
  14. 74M35A2

    Piston Rings Worn Out, Time for a Rebuild

    Top ring may have been chrome plated. Second rings are usually just plain iron. Check the new rings you ordered when they arrive, this may be the case there. I think relaxed state does matter partially as it will indicate the ring sealing pressure against the cylinder wall. Again, check the...
  15. 74M35A2

    What have you done to your 5 ton this week?

    Pics installed in heater box and part number? The S-10 one was the closest fit so far, but did require slight mod to work. If you have found a better fit, please share so we all can benefit.
  16. 74M35A2

    M939 Exhaust Mod as in 800 Series.

    Yes, the stock muffler is very heavy. Use of a stainless in-line aftermarket muffler will greatly reduce your bracketry. Flex tube for exhaust is junk, regular steel is rotten in a year or so. Stainless flex will last longer, but also not forever. It has to be thin to flex, and each grove...
  17. 74M35A2

    M939A2 Fumoto Oil Drain Valve Install

    Bought and installed a Fumoto oil drain valve in my M925A2 (Cummins 8.3). Not sure I like it yet, 50/50. Find myself looking at the oil pressure gauge often now. It is nearly solid brass and located above the front axle, so something would have to protrude up and into it's cavity similar to...
  18. 74M35A2

    Cummins 6CTA8.3 Injection Timing

    Our 8.3 IP's are Bosch MW pumps, which are similar but not same to Bosch P7100 pumps. I believe they do not have any advance mechanism within them. The 16 degree "sweet spot" I reference is taken from the RV boards where they are equipped with the P7100 pump.
  19. 74M35A2

    Piston Rings Worn Out, Time for a Rebuild

    Mass production piston compression rings are typically made out of iron. That is why they snap when over-expanded. Piston oil control rings are made out of steel, which is why they don't break, they just bend. You are on unauthorized fuel from an unknown source and double the factory boost...
  20. 74M35A2

    Ctis versus regular axles

    Wow, there is some experience in there.
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