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  1. 1998crewcab

    1998 k2500 454 getting hot

    Have you tried pulling out thermostat Yes it will take a bit longer to warm up But you will see if it keeps gauge from moving around during stops and when driving
  2. 1998crewcab

    1998 k2500 454 getting hot

    Not all thermostats are the same High flow ac delco on top original type replacement gm ac delco on bottom High flow pump push around 20 percent more coolant, like having your truck rev 20 percent faster i don't dog my truck so having cavitation problems at 8000 rpm is not an issue ...
  3. 1998crewcab

    1998 k2500 454 getting hot

    The high flow water pump and thermo worked wonders for my truck I went through same with original water pump and thermostat Changed it out to higher flow system Truck is much happier After installing OEM parts and same results/ problems where it would creep at stop lights Actually, once...
  4. 1998crewcab

    1998 k2500 454 getting hot

    I also use this to fill radiator With coolant It burps all air out the first time
  5. 1998crewcab

    1998 k2500 454 getting hot

  6. 1998crewcab

    1998 k2500 454 getting hot

    I run a high flow water pump Flowkooler with a high flow thermostat With stock temp Truck used to come to stop light and do what your truck did But never over heated Now it runs and needle never moves once it warmes up Even on the hottest days it’s same temp as coldest Glad I used the high...
  7. 1998crewcab

    Vortec 454 trouble....

    50 PSI sounds low before you start chasing ghosts spray some starter fluid into intake throttle body Not too much and see if she fires up I use Delphi pressure regulators also if you are back there replacing regulator replaced the Oil Pressure switch (it also controls fuel pump )
  8. 1998crewcab

    Water Pump Relacement

    here is 5% off Rockauto add code to how did you hear about us when checking out where payment info goes valid till Jan 1 , 2021 156347700143227696
  9. 1998crewcab

    1994 chevy rcsb AC hi pressure line seized in both ends. What to do?

    Heat that nut up , penetrating oil then heat it again and put your wrench to it when it stops turning, remove wrench and heat up again and turn some more as it cools the aluminum nut will shrink
  10. 1998crewcab

    1994 chevy rcsb AC hi pressure line seized in both ends. What to do?

    to prevent galling in the future , I use it on o-rings and threads and mating surface just a drop on mating surface and a couple on threads, Nylog blue gasket and thread sealant made for refrigeration work every thing will assemble sooooo smoothly and more important, come apart in the future...
  11. 1998crewcab

    Crank No Start

    And while cap is off you can watch rotor turn while cranking With key off you can turn rotor maybe 1/4 inch Someone correct me if I am wrong It should look like it’s riding up the gear a bit Hard to explain but you have to do a couple of good ones to feel a bad one with worn gear.
  12. 1998crewcab

    Crank No Start

    Check your distributor pickup coil for Hall effect in Ac mode with multimeter for proper voltage while cranking You get fuel pressure for a short time (normal) them no pressure cause computer does not see pulses from distributor Hence no spark Easy to check before throwing parts at it. Check...
  13. 1998crewcab

    AC System Differences

    Unfortunately with the swap everything is possible Always start diagnostics with the basics Power and grounds Then you can move forward with confidence Compressors have stupid grounds locations that don’t like to be messed with as the harness ages. Diode is suspect weak point If you tug on...
  14. 1998crewcab

    AC System Differences

    you could check to make sure your AC relay is getting power Then measure voltage at compressor If you see 12 volts on one leg Then you have a ground issue With Ac system on . before tearing back into it Get some gauges to see where you are as far as pressure I don’t think it leaked per your...
  15. 1998crewcab

    Ac system advice anyone?

    What color is your compressor ? I believe this is true from what I have seen AC Delco “black” ones are rebuilt units Natural aluminum units from ac delco are new.
  16. 1998crewcab

    No start a new engine 7.4 Vortec

    when these trucks first start up they use the fuel pump prime Through the ecm feeding the fuel pump relay for a couple of seconds once computer sees the crank signal at a certain rpm , oil pressure switch will kick in and power the fuel pump . you have to follow up and do the correct fuel...
  17. 1998crewcab

    No start a new engine 7.4 Vortec

    Battery looks very low See if you can start with a fully charged battery Disconnect maf and try and restart Will go into limp mode
  18. 1998crewcab

    Ac system advice anyone?

    # 5 is most important in my opinion " do not use PAG or ESTER oils for lubrication of the seal " this is also in the factory service manuals , do it right... Best article for general information on topic , a must read... hope It can help someone
  19. 1998crewcab

    Ac system advice anyone?

    this is good stuff for o-rings and I use it on connectors for preventing galling of the threads worth the 9 dollars I show guys this stuff and how it works ...next thing they buy a bottle for A/C work
  20. 1998crewcab

    Ac system advice anyone?

    Using water is a big NO NO Will ruin Desiccant in the receiver/drier/accumulator Why waste days of your life trying to save a 25 dollar part You will need a new drier also With compressor, last item I connect to system as to keep it open to atmosphere as little amount of time as possible...
  21. 1998crewcab

    Ac system advice anyone?

    Just one question Why are you changing out evaporator core ? Are the hose connections ends damaged ?
  22. 1998crewcab

    Ac system advice anyone?

    I think if you are talking of the line to the evaporator then you should have an expansion valve in the condenser that would keep lots of stuff out like spiders etc... I would remove condenser Back flush as not to push dirt into system Remove expansion valve and back flush again And replace...
  23. 1998crewcab

    Coolant type Green or Dex-Cool

    I always ran dexcool But always wondered why my Lexus red and Honda’s blue coolant system never have issues and look perfect inside and would be a better alternative Any thoughts
  24. 1998crewcab

    FI intake gaskets

    What is the part number for type 3 gaskets with reinforcement made of metal? Thanks
  25. 1998crewcab

    Looking for ranges on Fuel Trims and Ignition timing

    a lean air fuel ratio? long term is concerning ,when replacing those parts if you had a tear/damaged gasket/seal , would had begun to lower you LTFT ( correcting for extra air that was bypassing MAF) I cant answer the spider question...I have a 7.4L any oil leaks around intake manifold, valve...

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