Hive question: How to clean the sparkplug wells on a Maserati V8.. ? | FerrariChat

Hive question: How to clean the sparkplug wells on a Maserati V8.. ?

Discussion in 'Maserati' started by 71Satisfaction, Dec 25, 2020.

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  1. 71Satisfaction

    71Satisfaction Formula 3

    Jul 15, 2012
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    New York and Norway
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    Art
    I have some amount of debris and filth going down into the sparkplug wells on my Khamsin's DOHC V8...
    I can get some of it out, but..

    ...the main problem is that I have to clean out some of the junk AFTER I've removed the plugs..

    How do I prevent debris from falling into the cylinder whilst cleaning the well, without the plugs in place?

    I could conceivably insert small plastic caps that parts manufacturers use to keep openings safe from debris during shipping and handling.. but I plan on using a steel bottle brush and compressed air to clean the wells, and that is pretty violent. Or I could do that, and just be careful. I'm concerned I might air-blast the cap away, exposing the cylinder.

    Have any of you developed any tricks for cleaning in there?

    Grazie,
    - Art
     
  2. EastMemphis

    EastMemphis Formula 3
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    May 25, 2019
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    If I were presented with that job, I would be extremely careful about sealing up the spark plug hole with something a bit more robust than a plastic cap. What if while blowing it out, that little plastic cap gained wings? Perhaps a more secure method would be to take an old spark plug and lop off the top. That way you'd be 100% sure of sealing the spark plug hole and the seat for the seal.
     
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  3. DWR46

    DWR46 Formula 3
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    Jun 19, 2012
    1,831
    Leave the plugs in and use compressed air to blow out any loose material. Then spray the wells with Brake-Kleen and dry out with a paper towel. Whenever you remove the plugs, loosen them one turn and then blow out any loose debris with air before completely removing the plugs.
     
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  4. 71Satisfaction

    71Satisfaction Formula 3

    Jul 15, 2012
    1,222
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    Art
    Thank you. Yes, exactly..
    I have some caps that will friction fit pretty tightly, I'll test them, see if they fit. If not adequate, I'm going to find out if I can source (4) short bolts with the threads of a sparkplug and clean one side at a time.. . The bolts I can blast with compressed air while removing them so any tiny pieces of grit will be evacuated before the bolt comes out.

    ...so far, I've crafted this little cleaning tool to get behind the sparkplug's hex edge, leaving the plug in place, spin it around a bunch of times.. then use compressed air to blow the crud out.. it's working adequately.

    Cheers,
    - Art
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  5. Froggie

    Froggie Formula Junior

    Sep 27, 2017
    477
    Belgium
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    Serge
    Clever small tool (you use it manually, I guess).
    I see the same kind of wear I have on my own plastic gloves when doing mechanics. At the end of the day, the fingers skin is ruined whatever you do!
    Serge
     
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  6. EastMemphis

    EastMemphis Formula 3
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    May 25, 2019
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    I use gloves consistently when working on virtually anything. My favorite gloves are Tiger Grip from Eppco. They are 7mil thick and protect my hands from many typical bleeders. These gloves are highly resistant to tearing, can take a lot of abuse before wearing out and generally go into the trash can intact. They fit better than other glove brands, at least for my hands, and come in a box of 100 for large.

    Regular exam gloves are 2 or 3mil. They tear with the slightest sharp edge. The 8 mil gloves, which are typically advertised for mechanics and such are too thick and cause a loss of deftness. The 7mil Tiger Grip gloves with their diamond pattern are just right for maneuvering that nut in the blind.

    During the height of the pandemic, I couldn't buy them from my usual source, Amazon, nor anyplace else so I called the company and they arranged for me to buy a case from an industrial customer. Great customer service there.

    Just checked and they still aren't available from Amazon. Glad I have 9 boxes left!

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  7. 71Satisfaction

    71Satisfaction Formula 3

    Jul 15, 2012
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    Yes, I push the brush all the way to the bottom, then spin it with my fingers using the loop at the end.. .

    (Apropos fingers and gloves - I use several pairs of the crappy vinyl gloves per day. The oils and cleaning solvents break the vinyl down very quickly. I will soon use up the box of vinyl gloves I bought when nitrile was in short supply).

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  8. 71Satisfaction

    71Satisfaction Formula 3

    Jul 15, 2012
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    It was unreasonably complicated to source any M14x1.25 bolts.

    Using tight-fitting plastic plugs has worked effectively so far... They show no signs of being blown out by compressed air... Now I'm waiting for delivery of some 7/8", 1" and 1-1/4" diameter steel wire brushes to clean inside the plug wells.

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  9. staatsof

    staatsof Nine Time F1 World Champ
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    Mar 13, 2005
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    Really? I've made custom piston stops using bolts.

    https://www.boltdepot.com/Product-Details.aspx?product=15179&gclid=CjwKCAiAxKv_BRBdEiwAyd40N8XIruY8soghAJagbrk1JWhJ6a15a7wjvQLFqoH1mCTqvN51ntcqOBoCKNIQAvD_BwE

    BTW my dead last Bora came with the later style QPIII plug covers which keeps a lot of the crud out of there in the first place. DWR46 has the right idea.

    I bet that Khamsins produced after my Bora also came with these. They work quite well.
    http://www.maseratinet.com//pc-14982-627-ignition-wire-set-tipo-330.aspx

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    Perhaps a cup shaped wire brush in an electric drill that slips over the bolt head would make much quicker work of this?
     
  10. 71Satisfaction

    71Satisfaction Formula 3

    Jul 15, 2012
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    ?? Something got lost here... those are M12x1.25. Not the correct thread. A search for M14x1.25 yielded nothing.

    Yes.

    I should have acknowledged this approach earlier. This is exactly what I had conceived, the only difference being the spiral brush to physically loosen crud behind the plug instead of chemically cleansing carb cleaner. Then, yes breaking each one loose and blowing crud out again before removal.

    Now, the red plastic plugs shown above will stay in place until the wells are abrasively cleaned and then crud blown out again before fresh spark plugs are re-installed.

    A bit redundant, but I have the time and will. Thank you DWR46.

    Bob, my friend with the original '77 Khamsin also has those 'ballerina skirt' dust covers on his plug wires.
    - Art
     
  11. jamespeter26

    jamespeter26 Karting

    May 9, 2019
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  12. staatsof

    staatsof Nine Time F1 World Champ
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    Sorry ... Google linked it but it wasn't 1.25 I then when I switched the pitch on the web sight I missed that BoltDepot dropped it to 12mm. Stupid search engines shouldn't substitute incorrect results like that.

    I have bought them for the aforementioned piston stop duty I don't know why they're hard to find now?
     
  13. staatsof

    staatsof Nine Time F1 World Champ
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  14. staatsof

    staatsof Nine Time F1 World Champ
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    Cut off an old plug then.
     
  15. staatsof

    staatsof Nine Time F1 World Champ
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    #15 staatsof, Dec 29, 2020
    Last edited: Dec 29, 2020

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