I cracked my bleed screw and replaced it with a metric screw. FYI, a fine threaded 10 MM screw works perfectly, but is there a reason the bleed screw is plastic and will this cause problems?

 

It shouldn't...others have found a brass replacement and are apparently happy with them. (I have two in my kit even as we speak, just haven't got around to installing them.)

 

I have had the same thing happen. I replaced the screw with a nice brass one. fits perfect and will only be overkill...

 

The key is to finger tighten the screw so that you do not blow the threads in the T piece, otherwise you will be shopping for a T piece as well. The bleed screw has a channel in the thread to allow air to escape when you bleed the system a regular screw does not - that's the only down side I can think of. The bleed screw also has an o ring, but you can slap the old o ring on your new screw.

 

Any reason for using Brass instead of regular metal?

 

Anti corrosion since it's around corrosive Dex-cool. And it's cool engine bling like the brass fill diff plugs.

 

Stainless steel will also work.