813EK

I have read the FAQ about this and a little confused on the brake line situation. I have a complete SI rear disc conversion minus the brake hoses / lines. I know I need the hose that connects to the caliber, but do I have to change my hard lines running under the car?

bafbrian

I did a similar rear disc conversion and didn't have to change the lines. But you can still inspect them. Also, depending on what FAQ you look at, you might want to look at switching the Brake Prop Valve to the SI to ensure the proper brake bias.

813EK

I read the one on here:

Drum to Disc Conversion - Brake Fluid Line Interchangeability

When you remove rear drums and convert to discs, if you are using 99-00 Si spindles and brake lines, everything is fine. However, other brake lines may not work. You do want 99-00 Civic Si or 96-00 Civic Type-R brake lines because the drum takes a different fitting. Regardless of what caliper you use, all rear calipers (and front) take a banjo bolt for the brake fluid, so they use an O-shaped connector opposed to the female fitting that connects to the hardlines on the frame of the car. So when converting from drum to disc, or disc to drum, the brake fluid lines are not the same, and regardless of which rear caliper you use, use brake hoses intended for a 99-00 Civic Si (OEM or aftermarket.)

Luserkid

DONT TOUCH THE HARDLINE. All you have to replace is the rubber line. If you look at a drum soft line, and a disc soft line you will see the difference.

bafbrian

When I did my conversion, I didn't have to change brake lines on my 98 coupe. Only thing it took was time.

813EK

I noticed the difference between the line to drum and the line to the disc. Was just unsure if the FAQ was talking about switching the hard line running from the master cylinder back. Thanks for the help