K'nex V8 Engine

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Introduction: K'nex V8 Engine

this engine was my smallest engine yet, I also have a intructions video on youtube for this engine. GOOD LUCK BUILDING!!

Step 1: Crank Shaft

the first thing!!

Step 2: Pistons

compact pistons, yet easy

Step 3: Crank Case

do not fill with oil!!

Step 4: Cylenders

for the pistens.

Step 5: Cam Shaftand Pushrods

the red conectors for the push rods should line up and stand up acuatly for the next step.

Step 6: Finishing

Step hardest step, and last step!!

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    108 Discussions

    I added two battery powered k'nex motors to a gear and it works great.

    picture041.jpg

    how does the crank shaft connect into one piece so that when you turn the crank it moves as one? - thanks

    If you wanted to, how would you add valves and rocker arms to this?

    4 replies

    I've tried... and failed. I just don't know how! >:-0 I need to make this for next week for a school science fair, and I NEED HELP!!!! is there any models or anything that you used to help you in the makings of your engine or anything? Or, if you remember, could you contact me at williamcondie@hotmail.ca please? Thanks!

    i made this 3 years ago but if you wach my video--- http://www.youtube.com/watch?v=U0Q9RbXeMHc
    you can stop the video when you see the valves, i used elastic bands for it but it wound work better with small springs. its all a got to help you so i hope it works out for you.

    Thanks! The rocker arms are on and the engine works fine! :-D

    TO MAKE IT RUN USE A CORDLESS DRILL TO ONE END OF THE CRANK SHAFT ITS REALLY COOL

    5 replies

    instead of using black hinges can we use one gray connector and allternate through the crank shaft so its a v4 ND NOT A V8