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  1. 96Z71ECSB

    Air Conditioning Problems?

    The Schrader valve is the leak. The cap will not hold the freon in the AC system. You will need to get a Schrader valve tool to remove it. The tool is usually a little longer for AC system Schrader valves compared to tire Schrader valve tools. Remove the Schrader valve slowly. There may still...
  2. 96Z71ECSB

    My Final Upgrades ....pushing the limit

    Sounds awesome!
  3. 96Z71ECSB

    My Final Upgrades ....pushing the limit

    I want to hear that monster! Post a video when the exhaust is done.
  4. 96Z71ECSB

    Hit a dead end, need new diagnostic ideas!!

    Just an FYI: Camshaft retard offset will not read correctly with the engine below 1000 rpm. You'll get the correct reading at or above 1100 rpm. I usually set it at 1200 rpm.
  5. 96Z71ECSB

    Transmission Question

    Shift solenoids are internal but they are attached to the valve body. Remove the pan and they are right there.
  6. 96Z71ECSB

    Need speaker help!!!

    Your right about the power and crossover point. I suggested 80hz until he gets subs. After that, raising the crossover point would be a good. As far as amp suggestions, keep to the name brands. Sony, Kenwood, Alpine, Rockford Fosgate, Kicker, Pioneer, all make very good, low power 4 channel...
  7. 96Z71ECSB

    Oil Cooler Line delete

    You've got it. 3/8 NPT I actually had the correct fittings in my stash of air hose fittings.
  8. 96Z71ECSB

    Oil Cooler Line delete

    O.K. I misunderstood the temp gauge thing. My apologies. It sounds like the gauge is accurate enough. If the truck is staying close to the 70C mark, then I think your good. Deleting the oil cooler lines won't change that temp. You will see a rise in kPa oil pressure. Mine gained roughly 8psi of...
  9. 96Z71ECSB

    Oil Cooler Line delete

    Rodger that. It's more than likely an inaccurate gauge. I did delete my oil cooler lines before my engine spun a rod bearing. I saw no rise it engine temps. With my new engine, I went back to the oil cooler lines, but I made my own with barbed fittings/fuel injection clamps/fuel line. I keep a...
  10. 96Z71ECSB

    Too Much Info

    Yep, but remanufactured 4 bolt long blocks usually cost more.
  11. 96Z71ECSB

    Mobil1 High Mileage 5w-30?

    I switched to Mobil 1 some 30,000miles ago on my old engine. It definitely cleaned it out. The engine did spin the #1 rod bearing at 196,000 miles and the old long block is sitting on an engine stand not more than 5 feet away from me. It looks very clean for the mileage. My new engine will get...
  12. 96Z71ECSB

    Oil Cooler Line delete

    70C=158F 100C=212F 125C=257F Your truck should run between 88C (190.4F) and 99C (210.2F) with a 90C (194F) thermostat in it. I've never seen a Celsius thermostat before so don't quote me on the exact thermostat temp for your truck. Check that, now that I think about it, I have seen 90C stamped...
  13. 96Z71ECSB

    Need speaker help!!!

    I run a Fosgate R400-4D in three channel mode (rear channels bridged for a 12" sub). It's not a cheap amp. I like it because it's a very small class-D amp, but very clean and powerful for it's size. What you need to look for is an amp with 40 to 75 watts RMS per channel into a 4ohm load. It...
  14. 96Z71ECSB

    Need speaker help!!!

    Yes. On several different vehicles. One was similar to the OP's application. It was a 70's single cab square body pickup with a old school headliner in it. The headliner had a shelf in the front with two 4" Infinity coaxial speakers and two 4" pods behind the occupant's head. Same type of...
  15. 96Z71ECSB

    Need speaker help!!!

    As implied earlier in this thread, any decent 4 channel amp will run eight 4ohm speakers (two per channel wired in parallel). You will need to check the specs of the amp to make sure each channel is 2ohm stable. You will also need to make sure the speakers you buy are all 4ohm each. Of course...
  16. 96Z71ECSB

    Y pipe replacement?

    The O2 sensor needs to be in front of the cat. It's used by the trucks ECU (along with other sensors) to maintain proper air to fuel mixtures. The truck will run terrible if it's after the cat.
  17. 96Z71ECSB

    pulling an engine, need help

    I left the trans in place when I pulled my engine.
  18. 96Z71ECSB

    After pulling fuse, truck doesn't stay running

    I had a courier do that once with one of our fleet cars. He said it just quit. I had to travel an hour down to Denver, winch the car on a trailer, and tow it another hour over to The Boulder shop. I checked the car out quickly and saw that the fuel gauge read below empty. I pored two...
  19. 96Z71ECSB

    Rattled noise under engine/tranny

    I may be way of base here, but it sounds like an exhaust rattle to me. A loose exhaust shield or possibly something in the exhaust. Crawling underneath while it's running (on jack stands) would be the best way to pinpoint where the noise is coming from. That's how I found my rattling torque...
  20. 96Z71ECSB

    Brake problem

    It shouldn't matter if the truck is running or not to check the master cylinder. Pump the brakes up, once they are pumped up, keep constant pressure on the pedal. If the pedal slowly goes to the floor, then the master cylinder is the culprit. If it stays firm, then continue bleeding the system...
  21. 96Z71ECSB

    Brake problem

    Is the truck running when you pump the brakes up? Pump them up and keep constant pressure on the pedal. If the pedal slowly goes to the floor, you have a bad master cylinder. If the pedal stays firm, then you need to continue bleeding the brakes. GMT400's are notorious for brake bleeding...
  22. 96Z71ECSB

    Subwoofer install with stock radio?

    Check you amp for speaker level inputs. You may not need a converter.
  23. 96Z71ECSB

    Another Magnaflow vs. Flowmaster Thread

    I know the flowmaster 50 is louder, but I'm wondering if it's noticeably louder to where it justifies the cost. Did you have the opportunity to test both in person by any chance? I have experience with the FM 40 from other vehicles I've owned. They will wake the neighbors. I wanted...
  24. 96Z71ECSB

    Another Magnaflow vs. Flowmaster Thread

    A FM 50 will be louder than a FM 70. Of course, video's aren't going to give you an idea on how loud a muffler is. It was a specific tone I was after. My '96 sounds exactly like this '98. https://www.youtube.com/watch?v=HUJolX17hIE https://www.youtube.com/watch?v=0GMTNG2lEyQ...
  25. 96Z71ECSB

    Another Magnaflow vs. Flowmaster Thread

    I run a FM 50 series 2.25" dual in/dual out with full tail pipes and I get very minimal drone inside the cab. I did have the FM mounted as close to the rear diff as possible. A 40 series might be a different story though.

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