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.

Getting new pushrods, do I need special rods?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by PetaKane, Aug 3, 2002.

  1. PetaKane

    PetaKane 1/2 ton status

    Joined:
    Apr 17, 2002
    Posts:
    530
    Likes Received:
    0
    Location:
    Oklahoma City OK
    Okay I'm changing the cam in my motor, going from roller cam to hydraulic, I know that's crazy and stupid but it's too late for me now. Are all pushrods created equal or do I need to get good ones? And if so, who makes the best or at least good ones? Also, I see that they have them in different sizes. Ie, stock length, +.100", +.160", etc. What size do I need for Vortec heads with a hydraulic cam? And are there any other parts I need to get to go along with new pushrods? Thanks
     
  2. bigmack

    bigmack 1/2 ton status

    Joined:
    Jan 3, 2002
    Posts:
    478
    Likes Received:
    0
    Location:
    Tennessee
    Not all push rods are the same. I have a set of Manley chrome moly's in my 2wd truck and they have worked fine. You may have to get a different legnth since you are changing from the roller setup. If your heads have a stock valve spring then you probably wouldn't need the extra stregnth of the chrome moly rod. I don't know what legnth you would need, but maybe someone here has gone thru what you are doing and they will know.
     
  3. JIM88K5

    JIM88K5 1/2 ton status

    Joined:
    Apr 27, 2001
    Posts:
    1,384
    Likes Received:
    0
    Location:
    Vancouver, Wa
    You'll need shorter push rods.
    Jim
     
  4. Pure Insanity

    Pure Insanity 1/2 ton status

    Joined:
    Mar 17, 2001
    Posts:
    4,579
    Likes Received:
    0
    Location:
    Dade City, Florida
    Hes going from a roller, that the lifters stick above the lifter bores, to a hyd. flat tappet cam that has the lifters in the bore. The ones he has now are too short, He dont need shorter for sure.

    Besides we discussed this in P/M and got it handled. /forums/images/icons/wink.gif
     
  5. JIM88K5

    JIM88K5 1/2 ton status

    Joined:
    Apr 27, 2001
    Posts:
    1,384
    Likes Received:
    0
    Location:
    Vancouver, Wa
    OOPS /forums/images/icons/crazy.gif
    Jim
     
  6. tipoil

    tipoil 1/2 ton status

    Joined:
    Jul 30, 2002
    Posts:
    222
    Likes Received:
    0
    Location:
    canada guebec
    u will need longer ones for sure. COMP CAMS say the roler pushrod is 0.600 SHORTER than the flat tappet ones.
    Try using a stock ones to see if it fit(flat tapet ).
    the only way to be sure is to get a length checking pushrod.
    I would barrow a old one from a freind or junk ward to check it out (if u dont have any)

    One more thing remember to get the correct timing spocket,
    they wont interchange,u will need a older timing chain model, for flat tappet cam .
     

Share This Page