Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

.045 gap plugs?

Discussion in 'The Garage' started by SS66, Jul 9, 2006.

  1. SS66

    SS66 1/2 ton status

    Joined:
    Feb 13, 2003
    Posts:
    538
    Likes Received:
    0
    Location:
    WI, USA
    Im looking in my Haynes manual for the correct spark plug for my 88 350 Carb'd. It claims a R44t With a .045 gap is what I need.

    Everywhere I look I see .035, will these work any better or worse? Or is .045 exactly what is needed.

    Also, should I buy decent plugs or generally will the cheap ones work just as good. Im not expecting noticeable power differences but I guess you never know. Im running rich right now ( smell lots of gas ) Its probably the carb but Im sure it could use new plugs anyway.

    Thanks
     
  2. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

    Joined:
    Jun 13, 2003
    Posts:
    29,622
    Likes Received:
    1,375
    Location:
    Jersey Shore
    AC's all the way... Doubt you'd find a "cheaper" plug anyway... .035 is what most sb's take, but if it calls for a .045, run it.. It will only help burning off any extra fuel....
     
  3. WhiteBurb

    WhiteBurb 1/2 ton status

    Joined:
    Mar 10, 2005
    Posts:
    307
    Likes Received:
    0
    Location:
    Louisiana
    Under the hood of your truck there should be an emissions label that says exactly what the gap should be. Don't rely on what the Haynes manual says. Then get the plugs for your truck. You can also change the gap on just about any spark plug if need be.
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,979
    Likes Received:
    189
    Location:
    Roy WA
    Yes, you need to check the gap of whatever you buy, even if they are supposed to come pre-gapped.
     
  5. roadnotca

    roadnotca 3/4 ton status

    Joined:
    Sep 16, 2005
    Posts:
    5,433
    Likes Received:
    1
    Location:
    Redondo Beach, CA
    Carb'd HEI runs .045.
     
  6. Grizz84

    Grizz84 Registered Member

    Joined:
    Dec 23, 2005
    Posts:
    47
    Likes Received:
    0
    Location:
    NW Georgia
    What he said
     
  7. 4xcrazy

    4xcrazy 3/4 ton status

    Joined:
    Oct 31, 2003
    Posts:
    9,471
    Likes Received:
    5
    Location:
    Olympia/Lacey, Washington
    Not all ,,,:whistle:
     
  8. roadnotca

    roadnotca 3/4 ton status

    Joined:
    Sep 16, 2005
    Posts:
    5,433
    Likes Received:
    1
    Location:
    Redondo Beach, CA
    Well yeah, that goes for anything on this site.:D
     
  9. diesel4me

    diesel4me 1 ton status Premium Member

    Joined:
    Jul 24, 2003
    Posts:
    17,546
    Likes Received:
    937
    Location:
    Massachussetts
    good advice??

    That would be good advice for a truck with its original engine--but if you followed the emission label on my 79 C10,you'd be reading the one from the 250 six I yanked out of it last year....:doah:
    (I gotta scrape it off one of theese days.)..:D

    Might be best to look up the engine code, and find out what it really came from,just in case..I put gasketed plugs in a '69 350 equipped pickup once--and the motor was NOT a 69!!--it was a later 350 that took peanut plugs!--it burnt the gaskets AND the electrodes off the plugs in one 70 mile hiway ride!..:eek1: ...

    In my experience,I never could tell any difference between .035 and .045 gapped plugs either..if you went .080 on the gap,then it makes a slight difference..mostly makes it miss easier under a load,unless you have some super-duper ignition like an MSD box and coil...:crazy:
     

Share This Page