indexing spark plugs

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indexing spark plugs

Post  cobrakid8 on December 4th 2017, 4:22 pm

I have a question, The BBC that i have the prior owner indexed the spark plugs, he marked where the strap is and drew a line and they all sit around (1:00 o'clock position). We took all plugs out because we thought maybe the motor had hydro-locked the other night. Took each plug out and put them to the side exactly as they had came out exact order and with same amount of washers. So after turning motor over (after fixing the starter) I put the plugs back in and all went back exactly as they came out except one that is now 180 degree's out (like 7) from where it was lined up before. I added another washer and it still tightened up somehow 180 degree's from where the mark is supposed to be. so my question is what could be causing this and how bad would it hurt to just tighten it up and leave it 180 degree's out because i don't want to just remove the only washer that the plug has on it. Thanks!

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Re: indexing spark plugs

Post  BBFTorino on December 5th 2017, 12:45 am

Iron or aluminum head??

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Re: indexing spark plugs

Post  dfree383 on December 5th 2017, 6:04 am

Does the motor turn over fine with out plugs?
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Re: indexing spark plugs

Post  cobrakid8 on December 5th 2017, 8:02 am

Aluminum Dart heads and yes the motor turns over fine without the plugs in it. It supposedly has 15/1 compression, but I am lost on why the plug didn't go right back in since it was the one that came out and only had one washer on it.

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Re: indexing spark plugs

Post  Doug Rahn on December 5th 2017, 8:25 am

Maybe the threads are starting to pull out of the head.
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Re: indexing spark plugs

Post  cobrakid8 on December 5th 2017, 11:23 am

Lord, i hope not, finally found a ford motor to trade for this weekend and I dont need the hassle of this thing now having problems lol

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Re: indexing spark plugs

Post  dfree383 on December 5th 2017, 10:10 pm

Doug Rahn wrote:Maybe the threads are starting to pull out of the head.
that wouldn't cause a clearance issue, have you tried a colder plug?
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Re: indexing spark plugs

Post  cobrakid8 on December 5th 2017, 10:21 pm

Changed the plug tonight and after adding a washer it was close enough for government work.

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Re: indexing spark plugs

Post  Doug Rahn on December 6th 2017, 9:11 am

dfree383 wrote:
Doug Rahn wrote:Maybe the threads are starting to pull out of the head.
that wouldn't cause a clearance issue, have you tried a colder plug?

Did I miss something in his original post about a clearance issue? All I saw was an issue with one plug returning back to it's original index location.
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Re: indexing spark plugs

Post  Curt on December 6th 2017, 9:49 am

cobrakid8 wrote:Changed the plug tonight and after adding a washer it was close enough for government work.

If the piston isn't closing the gap, you're wasting time.
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SAME....

Post  duggy2145 on December 9th 2017, 1:18 am

Doug Rahn wrote:
dfree383 wrote:
Doug Rahn wrote:Maybe the threads are starting to pull out of the head.
that wouldn't cause a clearance issue, have you tried a colder plug?

Did I miss something in his original post about a clearance issue? All I saw was an issue with one plug returning back to it's original index location.


From what I read the starter was causing the lock up... and has been fixed. Just a question about indexing a plug electrode.....

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Re: indexing spark plugs

Post  cobrakid8 on December 9th 2017, 4:38 pm

Yes, the starter caused motor not to start, that's been fixed it was just that after getting that fixed the plugs weren't lining up. That's not been pretty much fixed and I go tomorrow hopefully to trade this for a different motor that's a BBF.

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