Best way to knockout M/T valve cover holes?

[Kevin Jonker]

Do you use a hole saw to cut out the knockouts? Or a socket? I don't know how brittle they are. They are the typical cast M/T black wrinkle valve covers. Any suggestions? Thx, Kevin

 

[the67fish]

a drill or hole saw.

 

[pettybludart]

I used a socket with no problems.

 

[Backtobasics]

I always had to use the hole saw...

 

[RustyRatRod]

I use a hole saw. Seen people use a socket but also seen some where they knocked part of the valve cover out too.

 

[Kevin Jonker]

Thanks folks, I guess it's time to buy a hole saw.

 

[crackedback]

Drill and a jigsaw works too.

 

[Kevin Jonker]

hmmm.. good thought

 

[duster340]

i drilled mine out to about 1/2" and then i used a rotating file for the rest

 

[72dustyer]

Get a step drill or uni-bit as they are called. I have all kinds of sizes and find them easier to keep track of instead of having a bunch of hole saws and arbors and such layin around. don't spend the $$$ for a good one, just get the 3 pack assorted diameter one from HD or Lo's for ~$20