Black goo in brake reservoir (1 Viewer)

Joined
Jul 19, 2005
Messages
48
Location
Temecula, CA
I was bleeding my brakes in my fj40 that I have had for about 2 months and noticed that the fluid in the reservoirs looked a lot dark. On further inspection I found that there is a film of black oil (engine oil?) in all of the reservoirs. I flushed the brake lines and cleaned everything out, but what would cause something like that?
 

Landpimp

GOLD Star
Joined
Mar 14, 2003
Messages
16,068
Location
Gig Harbor WA
 
 
 
yup, as well as the old rubber brake lines

QUOTE=andrewfarmer]not oil - rubber particles. Most likely main seals breaking down.[/QUOTE]
 
Joined
Jul 19, 2005
Messages
48
Location
Temecula, CA
andrewfarmer said:
not oil - rubber particles. Most likely main seals breaking down.
If this is normal and I don't see any leaks, does that mean I don't need to rebuild or replace the master cylinder? What other signs should I be looking for aside from some of the obvious like no pedal and not holding pedal pressure?
 

Landpimp

GOLD Star
Joined
Mar 14, 2003
Messages
16,068
Location
Gig Harbor WA
 
 
 
check the firewall on the inside of the cab for fliud leaking, this seems to where leaks 1st show up.

but if no leaks and everything is working fine, just flush the goo out, might even take a turkey baster and suck it out from the master before flushing.

fatmoe said:
If this is normal and I don't see any leaks, does that mean I don't need to rebuild or replace the master cylinder? What other signs should I be looking for aside from some of the obvious like no pedal and not holding pedal pressure?
 

PabloCruise

SILVER Star
Joined
Jun 3, 2004
Messages
19,634
Location
Northern Colorado
 
 
 
If I use the turkey baster, will I be able to wash the taste of brake fluid out, or will my wife kill me?

Any way to rig a compressed air nozzle to empty a MC reservoir?
 
Joined
Jul 13, 2005
Messages
604
Location
Springfield, MO
Sure, blow the air right in and it'll empty it quickly. might be kinda messy. Easier to use a vacuum pump at the bleeder to suck the fluid out from the whole line. I recomend having someone pour new fluid in as you are doing it so no air gets in.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top Bottom