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454 pollution control "PLUG" [Expired Topic]

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by Hehe, Aug 2, 2005.

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  1. Hehe

    Hehe New Member

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    Hey what size plug goes in the exhaust for pollution control on a 86 suburban.
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  2. 84fiero123

    84fiero123 New Member

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    RE: 454 pollution control "PLUG"

    what are you talking about? i used to live in massachusetts and they had emition standards there but i got to be honest i have no idea what you are talking about, unless you mean O2 sensor.
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  3. Hehe

    Hehe New Member

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    the pollution control that runs out of each exhaust tube. I am removing it and want to know what size thread it is.
    Can anyone help.
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  4. 84fiero123

    84fiero123 New Member

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    no and my 86 is haveing the rockers replaced right now, so i cant help. but i can tell you that if you take it to a shop or have a mig yourself the way it is done. just find a bolt that fits close and mig weld the bolt in. usually they will brake off any way unless its a new pipe. if it is just find a bolt that fits at the hardware store. but i weld the bolt in with a mig. it cant come loose.
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  5. ARNIE

    ARNIE New Member

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    Those are air injection tubes.........when they are un-hooked they may make the MAP sensor set a code. If it does, take a hot pin and melt a tiny hole in the small plastic tube. Should take care of it.
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  6. Guest

    Guest Guest

    86 wouldn't have a MAP since it's Carb, not TBI.

    Just curious why you're removing them?
    #6
  7. ARNIE

    ARNIE New Member

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    I completely misread that as an 88'. My apologies. Looks like I need to begin using my glasses.
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  8. Guest

    Guest Guest

    I'm right there with ya on the glasses. I never wear them. I keep them on top of my monitor, but the problem is that my monitor is always on. Who wants to put on hot glasses??? :? I should probably put them somewhere else.......probably won't though. :)
    #8
  9. ARNIE

    ARNIE New Member

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    Looks like we think alike. I swear though, lately I just plain see stuff that is not there. I don't know if my brain gets to thinking about something and transfers that thought to my eyes, or visa versa. My wife say's I'm just old!
    #9
  10. 84fiero123

    84fiero123 New Member

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    my wife says i'm older than dirt. but i cant see without my glasses, bifocals now so if i spell something wrong it could be the wrong part of the glasses and it could be my spelling, hard to tell sometimes, my typing sucks to so you guys will be lucky if you can decifer what i write.
    #10
  11. Hehe

    Hehe New Member

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    changing water pump

    I had to change the water pump and had all of this CRAP in the way.
    2 pumps multiple hoses lines. large filter. the tubes on the exhaust make it a pain in the ass when changing plugs. And now my engine compartmnt looks like it has an engine in it.
    I just plugged the end of the lines till I can get some headers.
    But I removed 2 pumps all hose and filter.
    I have been told at the dragstrip they can add up to 15 HP by removing the power steering belt . So I wonder how much these two old pumps were robbing me?
    #11
  12. Guest

    Guest Guest

    RE: changing water pump

    The air pump isn't really using much hp at all, since there is virtually no resistance. I doubt you'd even see much of a difference with having the pump off. But hey every little bit does help.
    #12
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