Homemade Pushrod checking tool

Discussion in 'Tips 'n' Tricks Topic' started by TypeLT1, Apr 28, 2002.

  1. TypeLT1

    TypeLT1 Veteran Member

    Build your own homemade adjustable checking pushrod. Take a common 5/16-inch OD stock-type pushrod, cut in two, tap each end internally with 1/4-20 thread, and insert a piece of 1/4-20 threaded rod between the two cut ends...
    Car Craft July 1996 Issue

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    A roll of duct tape, bailing wire, and a little luck! It should hold together....
     
  2. Morkai

    Morkai Veteran Member

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    May 8, 2001
    Tifton, Ga USA
    Oh, I'm gonna have to try that. [​IMG]

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    Eric aka(Morkai)
    '79 Z28, Silver, T-Tops, 388-roller...back on the engine stand ;)

    "186,000 miles a second, it's not just a good idea... it's the law."
     
  3. zeebad1

    zeebad1 Veteran Member Lifetime Gold Member

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    Nov 24, 2001
    Northern IL USA
    What do you use to measure the tool with? I thought about doing this, but my digital caliper only goes to 6". I ended up borrowing a Manley tool & checked with a feeler guage.
     
  4. Tunedup

    Tunedup Veteran Member

    1,473
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    Feb 28, 2002
    Cocoa Florida
    You could do it with a 6" dial caliper. Just mesure the lenth of each peice after you cut it in half, then mesure the space between the 2 peices and add the 3 numbers up.

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    79 z28 305 h.o., 200r4, C&C T-tops, factory rust option ;)
    Like a rock.... It sits.
     
  5. Nick76

    Nick76 Veteran Member

    1,990
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    Feb 27, 2002
    Ottawa, Canada
    Don't mean to be dense, but what is the purpose of this tool?
     
  6. Morkai

    Morkai Veteran Member

    1,250
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    May 8, 2001
    Tifton, Ga USA
    Cutting one of those (even stock) rods is easier said than done. [​IMG]

    You didn't have to drill them out to tap them to 1/4-20? What is the standard sbc rod length anyways? Once you measure each half, all you should have to do then is measure the gap with a dial caliper and you're set.

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    Eric aka(Morkai)
    '79 Z28, Silver, T-Tops, 388-roller...back on the engine stand ;)

    "186,000 miles a second, it's not just a good idea... it's the law."
     
  7. zeebad1

    zeebad1 Veteran Member Lifetime Gold Member

    900
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    Nov 24, 2001
    Northern IL USA
    The purpose of checking pushrod length is to make sure you have the correct valvetrain geometry. One important part of this is to keep the rocker arm tip centered on the valve tip. I had my block decked, and found that I needed .100 shorter than stock pushrods to keep the roller centered on the valve. Stock length is 7.80". I'll probably buy the Manley checker tool ($8.00) before I do the cut pushrod thing.
     
  8. Morkai

    Morkai Veteran Member

    1,250
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    May 8, 2001
    Tifton, Ga USA
    I got one cut at work no problem (I love power hacksaws), but man I couldn't get a tap to start in that hard#%@ metal.

    You may be right about just buying one, but I can tell you one thing half a rod is good for. It's pretty great for knocking in the oil dipstick sleave that goes into the block/pan. [​IMG]

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    Eric aka(Morkai)
    '79 Z28, Silver, T-Tops, 388-roller...back on the engine stand ;)

    "186,000 miles a second, it's not just a good idea... it's the law."
     
  9. TypeLT1

    TypeLT1 Veteran Member

    May be better to just buy one.... Thought this may work for someone and I am sure it will...
    May try it myself and see how hard it is to do...


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    Break away from the pack,dare to be different..
    A roll of duct tape, bailing wire, and a little luck! It will run just fine...
     

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