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  •  » Spark plugs for 97 GT40 heads?

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    11/18/2023 6:44 PM  #1

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,189

    Spark plugs for 97 GT40 heads?

    Can’t find any plugs for 97 GT40 heads that will go down in the hole gar enough to engage. What do I need?  Tried everything OReilly had
    Autolite AP25 won’t go in.
    ???

    The round extended portion of these plugs measure 0.610” diameter and won’t go into the hole.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    11/18/2023 7:24 PM  #2

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,322

    Re: Spark plugs for 97 GT40 heads?

    I would suggest stock 1996 Explorer 5.0L spark plugs or 1996 F-150 5.8L spark plugs.

    Last edited by Nos681 (11/18/2023 7:49 PM)

     

    11/18/2023 8:27 PM  #3

    Greg B
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    Registered: 4/01/2013
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    Re: Spark plugs for 97 GT40 heads?

    Aren't those Auto lite 764?   I think that's the number.  Been a while since I worked the parts counter.

    Edit: I went and looked it up.  Autolite 104 or 765.

    Last edited by Greg B (11/18/2023 8:40 PM)

    If multiple things can go wrong, the one that will go wrong will be the one that causes the most damage.
     

    11/18/2023 9:42 PM  #4

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
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    Re: Spark plugs for 97 GT40 heads?

    Thanks, guys.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
       •Thread Starter
     

    11/19/2023 7:18 AM  #5

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
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    Re: Spark plugs for 97 GT40 heads?

    Greg B wrote:

    Aren't those Auto lite 764?   I think that's the number.  Been a while since I worked the parts counter.

    Edit: I went and looked it up.  Autolite 104 or 765.

     
    I looked at pictures as listed on Rock Auto and I noticed the threads are different between the two you listed.  Just trying to understand the difference.

    As I recall, the GT40P heads have the short threads on plugs.

     

    11/19/2023 11:12 AM  #6

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,189

    Re: Spark plugs for 97 GT40 heads?

    These are three bar GT40 heads. I ordered some plugs for 96-2001 Explorer 5.0 from Amazon last night. Hopefully they work

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
       •Thread Starter
     

     

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