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  1. Defcon-1

    M923a2 Coolant System Drain and Flush:

    No worries Sir, you have the theory correct. The t-stat allows the coolant around the block to be pushed up and over (past the S-stat) and then into and through the radiator, back to the block and all other junctions thereafter. So if the t-stat is stuck closed, no water flow past the s-stat...
  2. Defcon-1

    M923a2 Coolant System Drain and Flush:

    If I remember correctly, A2's have the single, there is a second port in the housing, but there is a giant rubber-plug installed to block that water-flow. I think in the TM under "thermostat removal / installation" it will clarify.
  3. Defcon-1

    M923a2 Coolant System Drain and Flush:

    Yeah it sounds like it could be one or multiple issues, you'll have to eliminate them one by one. That upper tube going across the block is the inlet-line right past the T-Stat, if that is not hot 180' and above, the T-Stat is not opening (no water-flow into the radiator). It could also be...
  4. Defcon-1

    M923a2 Coolant System Drain and Flush:

    Good Day Sir, The S-Stat kicks on as the last-attempt to cool the engine down, T-stat opens around 180' (allowing additional cooling via the radiator) and S-stat opens around 195' (provides additional cooling by means of forced-airflow across the radiator and block). Also to note, the removable...
  5. Defcon-1

    M923a2 Coolant System Drain and Flush:

    Anytime Sir, happy to help. I did the 50/50 mix because I figured "I have a block heater now" and I would be plugged in for any incoming temperature to single-digits, so doing 50/50 made more sense. Point of order: Now would be the time to do a block-heater if that was on the "to-do" list for...
  6. Defcon-1

    M923a2 Coolant System Drain and Flush:

    Hmm special tools... trying to think 🤔 Nothing outside of my normal tooling I don't believe I needed, maybe my 1/2" breaker bar and torch to get that one block-plug out lol. Everything else was pretty straight forward, other than garden-hose adapters / elbows / swivels to get that 1/4"...
  7. Defcon-1

    M923a2 Coolant System Drain and Flush:

    Good Day Sir, For all intents and purposes, the TM has the correct process step-by-step, I was being a little OCD in the process lol. There were a lot of extra steps I did in between, like draining from the block and drivers-side radiator port, adding a coolant-filter, adding cleaning agents to...
  8. Defcon-1

    Question(s) About Running an Auxiliary Battery:

    This makes good sense, thank you. The manufacturer of the converter got back to me and said "it is not a stage-charger, it offers power only if needed, and does not push power" but they wouldn't comment further. I'm guessing this means it's different than a regular battery charger that slowly...
  9. Defcon-1

    Question(s) About Running an Auxiliary Battery:

    Where is it in your truck? Just curious. Having a 12v battery being charged on its own system by its own alternator is optimal, but that's going to be too far out of my technical ability. I need to find a way to charge it / maintain it outside of that, (that's even if I need to do that, because...
  10. Defcon-1

    Question(s) About Running an Auxiliary Battery:

    NGL that's awesome, but that is *way* out of my technical-know-how (and) desire to do something like this lol. Is your 12v alternator connected to it's own 12v battery?
  11. Defcon-1

    Question(s) About Running an Auxiliary Battery:

    Alright electrical-gurus, I need some help trying to figure something out in my truck. To preface this, my 923 has an industrial lift-gate installed on the back of the bed. It has been working (has worked) in the past until I removed the aux-battery from the aft-tool-box (to install tooling in...
  12. Defcon-1

    M923a2 Coolant System Drain and Flush:

    This is just a followup, probably the last post here from my end. Been running the coolant (post-drain and flushes) for months now and this is the sample I took the other day after removing 2+ gallons to work on my fan-clutch actuator / shutter-stat. Note: This was taken from the drivers-side...
  13. Defcon-1

    Actuator, Air Fan Clutch for M923a1

    I just developed a leak from this little hole as well. The truck sat for 10+ days so I'm not sure if it's related but I will also trying taking it out and cleaning / lubing it. Did you get a fix on yours?
  14. Defcon-1

    Secondary Tank Leak While Braking:

    That's a good copy, will report back with findings, ty Sir
  15. Defcon-1

    Secondary Tank Leak While Braking:

    I promise I tried searching for this but there's like a million+ threads and I can't figure out which one is applicable, so apologies in advance if I'm asking a question that's been answered multiple times. Sitting at an extended red-light, I noticed my secondary air gauge was going down little...
  16. Defcon-1

    VERY basic bead lock question

    Also as previously mentioned about lube, I used this stuff to break the bead and to assist with getting everything back in, it had plenty of working time, just a suggestion. I know some guys use Dawn soap too, anything to keep it slippery will help lol
  17. Defcon-1

    VERY basic bead lock question

    EZ-PZ indeed 💪
  18. Defcon-1

    Can I substitute 450/80r20 tires for 14.00 -20's?

    I was in the same boat last year when I lost 2 of my 14.00 XZL, but didn't want to buy 7 (or change over to 16.00) at once. 14.00 are super hard to come by but I see them every now and then on FB-MP, I found replacements of the 2 XZL's on there actually and have AT2's in their spot (forward...
  19. Defcon-1

    Rate this front bumper modification...

    No worries, ty I will. I lost (x2) ZXL's in the fronts (due to cracking in the sidewall) and then I had Goodyear AT-2's installed in place (as they were spares). But I'm out of ZXL's and AT-2's and have some XL's as "backup tires" just in case I lose another ZXL. Trying to save up for 16.00 R-20...
  20. Defcon-1

    Rate this front bumper modification...

    Ok that sounds good, I need to install one of my XL tires in the spare-tire location and I wasn't sure if it would matter what side I needed it for. I guess I'm not going through water at 50+ mph where I would need it to sling in the correct direction lol. I'm glad to hear you ran these...
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