I need to drill and tap some holes in a replacement crank pulley to replace a cracked one for my CTSC kit. Does anyone happen to know the size tap I need off hand (or size/thread pitch of the bolts)? Maybe if you've done this before you might know. Otherwise, how do I find this out? Take one of the screws/bolts with me to a store? Where do they even sell taps?

 

machine shops sell taps and tap kits as well as sears and harbor freight.

the tap kit will have a thread gauge and dies that you can match your original bolts to as well.

 

I believe its M5 x 1.0

 

^m5?

thats a tiny bolt. smaller than the m6(common 10mm heads) that are everywhere on the car.

crazy.

 

Yep M5 thats why you use 6 of them per crank pulley.

i think thread pitch is 1.0 and length should be around 30mm long

 

they're tiny You gotta remember where this thing is going. Plus these are bolts supplied by Comptech, not Honda.

 

me and a friend had the bolts snap on us she upgraded to larger bolts might want to look into it more piece of mind