Spark plug questions

Discussion in 'Ranchero Tech Help' started by beerbelly, Aug 17, 2022.

  1. beerbelly

    beerbelly In Maximum Overdrive SILVER MEMBER

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    New plugs today; Motorcraft SP549 platinums vs. the Autolite 45's I had in there.
    Can you guys comment on the read of the old ones and let me know if I need to make any carb or other adjustments?

    Typical look for all:
    20220817_075416.jpg 20220817_075335.jpg
     

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  2. pmrphil

    pmrphil In Maximum Overdrive GOLD MEMBER

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    How about a peek down inside at the bottom of the insulator, with a fairly bright light. That's the preferable way/place to read them. Other than that, they look like they have some miles, as the end of the electrode has thinned a bit Color's not bad, maybe a tad warm (heat range-wise) but they do start better with a slightly warmer plug, so I wouldn't change from there.
     
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  3. beerbelly

    beerbelly In Maximum Overdrive SILVER MEMBER

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    Here's a few; they're all like this:

    20220817_095121.jpg 20220817_095148.jpg 20220817_095226.jpg
     
  4. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

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    Yeah, good, even combustion, no oil burning, no vac leaks. The platinums *should* work well on the A/F mixture you currently have. Remember, copper plugs will work 15-30K depending on mixture; what mileage is on these?
     
  5. pmrphil

    pmrphil In Maximum Overdrive GOLD MEMBER

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    If you wanted to get real picky, you could call it (very) slightly lean, but it looks SO happy the way it is I wouldn't change a thing. Andy had a good question as far as mileage goes - whatcha got?
     
  6. beerbelly

    beerbelly In Maximum Overdrive SILVER MEMBER

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    I believe these have about 10K on them; not quite sure.
     
  7. Jeff B

    Jeff B In Maximum Overdrive BRONZE MEMBER

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    As a general comment, when you change plugs, have close look at the tip of the plug and compare the size of the center electrode to the others in the new batch. Recently purchased a set of Autolites and there were 2 distinct different plugs with matching numbers on the plug and boxes. Don't know if this was poor QC or counterfeit but I had not seen this before.
     
  8. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

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    I'd say counterfeit. Autolite has really good control of their manufacturing. It's why I hate O'Reallys...they got rid of the Autolite brand starters and alternators. The alternator I put in my '83 Colony Park, that had the lifetime Autolite warranty, and when I scrapped it, the alternator went into Babe.
    Well, about a year or so before CSK got nabbed by O'Reallys, the alternator died, which surprised me. I took it and the paperwork, got a replacement, Bob's your uncle and, knock on wood *raps knuckles on noggin* it's still going strong today.
     
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  9. pmrphil

    pmrphil In Maximum Overdrive GOLD MEMBER

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    Sorry, Andy, but Autolite has crummy control of their stuff anymore. Rank Group, (New Zealand) the parent of Fram, outsourced manufacture of plugs to China quite a while ago, and QC has gone down the drain. Check it out for yourself online. I have a brand new Autolite Race plug with NO electrode.
     
  10. Hillbilly

    Hillbilly In Maximum Overdrive

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    Yep, same thing happened to AC Delco plugs after outsourcing. I have one with no threads.
     
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  11. beerbelly

    beerbelly In Maximum Overdrive SILVER MEMBER

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    I sure would like to see pix of these mutants!
     
  12. pmrphil

    pmrphil In Maximum Overdrive GOLD MEMBER

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    You know me - tech challenged :oops: but I'll try and have the wife take a pic.
     
  13. beerbelly

    beerbelly In Maximum Overdrive SILVER MEMBER

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    435-4350624_transparent-thumb-up-emoji-png-apple-emojis-thumbs-585798052.png
     
  14. Hillbilly

    Hillbilly In Maximum Overdrive

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    Not tech challenged, just don't know where I put it yet.
     
  15. aquartlow

    aquartlow In Maximum Overdrive

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    FWIW, I changed over from Autolite 45's to NGK WR5's. When I revamped my ignition system, I found the NGK plugs had much lowest resistance as compared to the Autolites and Champion RF9YC's. Just another plug choice in the limited 18mm spark plug "field".
     
  16. pmrphil

    pmrphil In Maximum Overdrive GOLD MEMBER

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  17. pmrphil

    pmrphil In Maximum Overdrive GOLD MEMBER

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  18. pmrphil

    pmrphil In Maximum Overdrive GOLD MEMBER

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    There !! Lots of help from my visiting daughter !! :rolleyes::oops:
     
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  19. beerbelly

    beerbelly In Maximum Overdrive SILVER MEMBER

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    Did you take notes?:p
    So .250" gap is not OK???
     
  20. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

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    Go look on the Wall of Shame. It's likely there!:D
     

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