How to Make Lego® Valve Stem Caps.




I can't take credit for this idea. Several years ago I had seen a Lego Edition Ford F-150 with blocks for valve stem caps. I decided to make my own. In this instructable I am going to make two for my motorcycle. Here it goes:

Step 1: You Will Need:

1) How ever many blocks and which ever color you desire but they must be 2X2.
2) Metal valve stem caps.
3) Hot glue gun.
4) Utility knife.
5) Small flat screwdriver.

Step 2: Cut Out the Center.

Be careful while doing this. Cut out as much of the center cylinder shape as possible. You should end up with about 1/8" left since the angle of the blade doesn't allow to remove all of it in one step.

Step 3: Finish Removing the Center.

Now, make the next cuts in the cylinder, straight down. The cuts should be close together. This will allow you to push the pieces back, breaking them off flush with the flat part of the block. This is where you'd use the small screwdriver.

Step 4: A Nicely Cleared Block.

Your block should look like this. You want to clear as much of the cylinder out as possible to avoid having alot of the metal valve stem cap exposed once completed.

Step 5: Fill the Block With Hot Glue.

Fill it roughly 3/4 full. It goes without saying that you don't want to make a mess but you want to try to have excess squeeze out once the cap is inserted.

Step 6: Insert Cap.

Insert the cap all the way into the block. Use the screwdriver to center and level the cap inside the block.

Step 7: Remove Excess Glue.

The cooling process can be sped up by placing the block in the freezer for a few minutes. You will need to first off, BE CAREFUL and second, remove the blade from the utility knife. Once the glue has cooled, cut the excess away.

Step 8: It Should Look Something Like This.

Hopefully without any blood loss.

Step 9: Tada!

Felicidades! You have made a Lego block valve stem cap. Make three more and you have a complete set. These bad boys should increase the coolness of your Chevy Cavalier by more than twice of what those Spongebob seat covers did!

Lego, Ford, F-150, Chevy, Cavalier, and Spongebob are registered trademarks of whatever they are registered trademarks of.

A monkey was harmed in the making of these caps, sorry :'(



  • 1 Hour Challenge

    1 Hour Challenge
  • Growing Beyond Earth Maker Contest

    Growing Beyond Earth Maker Contest
  • Fandom Contest

    Fandom Contest

45 Discussions


5 years ago on Step 9

Will it work with super glue? I haven't got enough money atm to buy a glue gun I cant afford one lol. im skint can only get hold of super glue will it work?


7 years ago on Step 7

I find that if you stick a credit card to the bottom when its in the freezer, you get a much smoother result


9 years ago on Step 3

I've got a method that doesn't use a razor, and seems to work better. Use a needle nose pliers, to grab the outsides of the center tube, and squeeze, then rotate the pliers (without squeezing) 90º or so and squeeze again, keep doing this until the center tube has almost completely detached, then twist and it should come out relatively clean.


10 years ago on Introduction

Cool idea! I bet using pieces from Playmobil would look great too!


10 years ago on Introduction

my one buddy has done something like this but with a .22 shell instead, but sweet idea and awesome instructable


10 years ago on Step 8

it seems as though metal valve stem covers are MANDATORY for this job. i can't find any plastic ones that fir inside the brick. they all hang out ALOT. super sweet instructable btw! i've actually decided to lego theme my bike, thanks to this instructable, and my love of legos. also working on getting lego knobs on my guitar.


10 years ago on Introduction

Using a lego person head would be pretty cool also. You would have this little head sitting on top the valve stem.

bill oddie

10 years ago on Step 2

this is a satisfying instructable, and it makes my old toyota corolla, look like its been on pimp my ride.(well, if you look close enough.) *on this step instead of taking out the inside bit of the lego brick with a stanley, i used a verticle drill.


10 years ago on Step 9

i love it... i will be cruising around seattle with these puppies in no time!

1 reply

10 years ago on Introduction

Thats really nice and clean, with supplies people probably already have. I rarely favorite things, but this will be there. Thanks!