VCCA Home Forums TECHNICAL - GENERAL Mechanical - Engine, Trans, etc remote brake fill resevoir-50

am making a brake fill resevour for my 50 car.drilled out a spare master cylinder plug and fitted a brass fitting with steel line going up to just below the opening of the front body mount.ran a rubber brake hose which really when you first look at it looks like a vacumn hose.then mounted a motorcycle brake resevoir unto the firewall the access cover.it looks ok. question is will i encounter any problems with the thin gasket that goes below the filler plate its not leaking now so i really dont see if leak later on down the line.m doing this because it seems alot easier than taking door sill off and peeling back rubber mat even though you dont do it very often. andy

I believe that the original cap has a vent in it, did you plug the vent and then add a vent to the cap on the remote reservoir?

Don is correct, the reserviour is vented but not just a hole in the cap. The later system uses a soft liner between fluid and air but it seals the fluid in and air/moisture out while allowing the level to fluctuate.
Tony

Even so, since the master cyl is actually vented, it is impossible to prevent air from entering the master cyl. We get a slug of air with each use of the brake pedal. Moisture is in the air plus, imagine the water splatter on a rainy day. Brake fluid loves moisture, which it readily absorbes. Obviously, moisture is what eventually destroys cyl seals and bores.

A properly installed remote fill resevoir (avaliable in kit form) should greatly delay this destruction since it will effectively greatly reduce (not completely prevent) the amount of air going directly into the master cyl. Moisture in the air is the enemy.

As we know, the bellows-type master cyl seals on later model vehicles (unvented) prevents air from entering the brake fluid which allows seals and cylinders, etc. to last a very long time.

I was thinking that having the original cap in place and then mounting a reservoir higher would cause brake fluid to leak out thru the vent in the cap.

Charlie

i drilled about a 3/16 hole thru the old cap and and tapped it to put the brass fitting i think 3/16 the brass fitting went way beyond where the vent holes came thru then for extra measure solder the small holes on each sides should not be any leaks if so will take and mig them. the reservoir i am using does have a rubber diaphram so i should be good there. someone let me know if this will work.at the moment having trouible finding about 18 inches of brake line hose to go between reservoir to metal line

Find a local shop that make hydralic lines. They are fairly common. They can even crimp fittings on both ends to suit your needs.

found what looking for.VW shop down street had some clutch/brake line justv what i needed 7mm inside diameter that works on bmw also.its blue but i have some black wire loom to put around it so it will look stock

'Glad you found the hose.

With your resevoir having a diaphram, your brake cylinders should last a very looong time (assuming they are in good shape now)! IMHO, you've made a very practicle improvement. I have a kit for the '41. Just haven't had time to install it.