I replaced the fluid level site glass's on both master cylinders and so far, no leaks. The clutch side has a little metal frame that I knocked out with the old window, there is also a slotted plate behind the glass that makes it easier to see the fluid level, but that got bent up so I didn't replace it. It would be nicer with it because the fluid looks almost black and is a little hard to see the level.
The brake side has the slot as part of the housing casting. The front brake calipers were already rebuilt & bled with new fluid and I was able to pull the fluid down below the window and change the site glass without letting any air into the system.
Both sides were done the same, a thin bead of Hondabond around the back edge of the hole, the original o-ring, another thin bead of H/B, the site glass, another thin bead and a final o-ring. Let it cure for 24 hrs, top up and check for leaks. When inserting the glass, push it against the back o-ring with a fingertip and rotate the glass 1/4 turn or so....this will spread the H/B evenly and create a better seal. Be careful not to apply too much H/B, it's hard to clean off the inside of the glass....especially on the brake side.
Can't tell you where I got the glass cause the paperwork is AWOL but the link is posted on here somewhere...it's Onfrei, or something like that. Measure the hole ID with inside calipers and order accordingly....if the glass is too big just run some emery cloth around the edge till it fits.
The brake side has the slot as part of the housing casting. The front brake calipers were already rebuilt & bled with new fluid and I was able to pull the fluid down below the window and change the site glass without letting any air into the system.
Both sides were done the same, a thin bead of Hondabond around the back edge of the hole, the original o-ring, another thin bead of H/B, the site glass, another thin bead and a final o-ring. Let it cure for 24 hrs, top up and check for leaks. When inserting the glass, push it against the back o-ring with a fingertip and rotate the glass 1/4 turn or so....this will spread the H/B evenly and create a better seal. Be careful not to apply too much H/B, it's hard to clean off the inside of the glass....especially on the brake side.
Can't tell you where I got the glass cause the paperwork is AWOL but the link is posted on here somewhere...it's Onfrei, or something like that. Measure the hole ID with inside calipers and order accordingly....if the glass is too big just run some emery cloth around the edge till it fits.
