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Thread: Bolt kit NEEDED to rebuild 4 valve engines seemingly gone obsolete overnight!?

  1. #1
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    Exclamation Bolt kit NEEDED to rebuild 4 valve engines seemingly gone obsolete overnight!?

    this is crazy you guys! Im trying to rebuild this engine but cannot get the main cap bolt kit anywhere. I was able to purchase the same kit maybe a year ago for $60 no problem. Now its been wiped off of the face of the earth!!! part number M-6345-A46 is sold out everywhere. Is my only other option really to buy the over kill $270 arp kit!? If anyone has any solutions or a source please let me know this is delaying things for me badly and I'm starting to get in trouble over it lol.... why does this always happen to me

    ford performance part showing NO LONGER AVAILABLE:

    https://performanceparts.ford.com/part/M-6345-A46


    98 P71 SOLD

    2003 MARAUDER - BLACK ~ Race Car
    2003 MARAUDER - DARK BLUE PEARL ~ DD
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  2. #2
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    When I get to the dealership this morning I will see if I can locate a set for you.
    2004 SB #2150 of 3214 Moonroof, Heated Seats and 6 CD Changer. Non OEM Mufflers and 32,XXX miles and counting.

  3. #3
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    Wow, you are correct as there is no Ford dealer in the country that has a set in stock. None on Ebay either. I'll let you know if I bump into a set.
    2004 SB #2150 of 3214 Moonroof, Heated Seats and 6 CD Changer. Non OEM Mufflers and 32,XXX miles and counting.

  4. #4
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    You check MMR in Cali?
    2004 SB Ported Trilogy 48
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  6. #6
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    Try ARP.

    The latest catalog.

    https://arpcatalog.com/2/
    “When you can’t make them see the light, make them feel the heat.”
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  7. #7
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    Man..this is not good news for me. I did check ARP I believe they have it but it’s much more expensive. Running out of time so might have to go that route but if ford really doesn’t plan on producing these anymore it’s kind of a smack in the face to 4valve enthusiasts really.


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    98 P71 SOLD

    2003 MARAUDER - BLACK ~ Race Car
    2003 MARAUDER - DARK BLUE PEARL ~ DD
    2002 Crown Vic Sport ~ top secret project car

  8. #8
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    Does anyone know if the side bolts are reusable or are those torque to yield as well?


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    98 P71 SOLD

    2003 MARAUDER - BLACK ~ Race Car
    2003 MARAUDER - DARK BLUE PEARL ~ DD
    2002 Crown Vic Sport ~ top secret project car

  9. #9
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    I don't see how they can be tty since you can't torque them. They go on just past finger tight. I've always reused them regardless.
    '03 Marauder 300A / Forged 11:1 Eaton @ 17 lbs - 87 Octane
    decipha @ EFIDynoTuning

  10. #10
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    Just spend $400 on ARP bolts


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    98 P71 SOLD

    2003 MARAUDER - BLACK ~ Race Car
    2003 MARAUDER - DARK BLUE PEARL ~ DD
    2002 Crown Vic Sport ~ top secret project car

  11. #11
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    You can buy main bolts in small qty packages i believe

  12. #12
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    Two questions: Chayton, the part number you listed is for a 3V modular and seems to have 6 extra bolts (10 studded inner mains, 10 outer mains, 10 side bolts, and 6 non-studded inner mains). Am I wrong about there being extra bolts, and did that kit actually work for 4Vs too?

    After some research and consulting with my favorite east coast part number nerd, here's what I have for part numbers to do a Ford main bolt kit:
    10 Ford XF3Z-6345-AA, side bolts
    10 Ford
    3L2Z-6345-BA, M8 outer bolts
    4 Ford
    3L2Z-6345-AAA, M10 inner bolts,
    6 Ford 3L2Z-6345-AA, studded M10 inner bolts

    I could be wrong about part numbers or quantities. If you know better, please correct me.


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