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.

700R4 cooling line flare nut size?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by zcarczar, Apr 13, 2004.

  1. zcarczar

    zcarczar 1/2 ton status

    Joined:
    Feb 10, 2002
    Posts:
    2,495
    Likes Received:
    0
    Location:
    Apple Valley California
    Ive searched all over the place trying to find the freaking size of the 700R4 cooling line size. They are flare nuts like on a brake line and use a 1/2" wrench. Im trying to figure out my cooler situation and am going to use AN lines if at all possible from the the rad. to the cooler and back to the cooler line.
     
  2. gm4x

    gm4x 1/2 ton status

    Joined:
    Apr 6, 2004
    Posts:
    347
    Likes Received:
    0
    Location:
    Pendleton, Indiana
    [ QUOTE ]
    Ive searched all over the place trying to find the freaking size of the 700R4 cooling line size. They are flare nuts like on a brake line and use a 1/2" wrench. Im trying to figure out my cooler situation and am going to use AN lines if at all possible from the the rad. to the cooler and back to the cooler line.

    [/ QUOTE ]

    I was thinking there are brass adapters (inverted flare) screwed into the trans case, screw them out & take them to parts store w/you.
     
  3. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    They're 5/16 flare.
     
  4. BobK

    BobK 1/2 ton status

    Joined:
    Oct 5, 2000
    Posts:
    1,604
    Likes Received:
    0
    Location:
    Petrolia,Ontario,Canada but working in Port Huron,
    I believe a 5/16 to 3/8 line would be a -6AN fitting.
     
  5. R72K5

    R72K5 Banned

    Joined:
    Mar 5, 2001
    Posts:
    8,905
    Likes Received:
    0
    Location:
    central IL
    5/16" is what GM has always used for gas engine auto trans cooling lines

    good luck
     

Share This Page