Leaking brake fluid cap - FordTough.ca - Home of Canadian Ford Truck Enthusiasts
Ranger Forum ALL YEARS ALL MODELS

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 08-12-2010, 04:36 PM Thread Starter
 
Lone Ranger's Avatar
 
Join Date: Jul 2008
Location: Fernridge, BC
Posts: 712
Send a message via MSN to Lone Ranger
Leaking brake fluid cap

Been having issues since day 1 with my truck, brake fluid cap leaks and albeit I constantly keep wiping it up its already starting to lift the paint off the front of the brake booster around the master. My truck's ready for its 40k service so I'm going to rant to the service manager about it, but just wondering if this is normal or odd? I've had older trucks weep a bit, but this one leaks a fair bit.

Can't really complain though, that and a broken shock [my fault] is all I've had go wrong wrong with the truck so far. LR

Matt T.

'09 Ford Ranger FX4 with a mean owner
Lone Ranger is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 08-12-2010, 07:06 PM
 
b4000's Avatar
 
Join Date: Feb 2009
Location: Northeastern BC
Posts: 996
Just checked my '07. No leak.

If Princess Auto were a real girl, I'd ask her to marry me.
b4000 is offline  
post #3 of 11 (permalink) Old 08-12-2010, 09:21 PM
 
07rangersport's Avatar
 
Join Date: Mar 2008
Location: Maple Ridge, BC
Posts: 743
mine never leaked

VMP and 5-Star tuned no more

Buy a hybrid my truck needs your gas
07rangersport is offline  
 
post #4 of 11 (permalink) Old 08-13-2010, 08:52 AM
 
LayinHp's Avatar
 
Join Date: Feb 2007
Location: Waterford
Posts: 3,019
ive seen the plastic baggy trick.... just screw the cap on over a plastic bag should stop the leak but wont fix the problem which shouldnt be on that new of a truck.



2007 F350 6.0L Ext cab short box 4x4
2000 F150 5.4L Reg cab short box 2wd
?? always looking for a new ford project !
LayinHp is offline  
post #5 of 11 (permalink) Old 08-26-2010, 02:24 AM Thread Starter
 
Lone Ranger's Avatar
 
Join Date: Jul 2008
Location: Fernridge, BC
Posts: 712
Send a message via MSN to Lone Ranger
They replaced it when they did the service, or I should say, ordered another one in. They did the service on Friday, only got it in this morning. Don't know if it leaks or not yet but I'll soon find out.

I have a sneaking feeling it might have something to do with the reservoir and not the cap, won't find out until I'm out 'wheeling next because it only seems to leak during elevation changes or heavy/extended engine braking, ie coming down steep logging roads. I always use my engine and gears to keep the speed under control, so I'm wondering if the excessive vacuum is somehow overloading the booster and forcing the fluid out..? 2nd gear low range at about 3500 rpm is usually the normal safe speed for going down a steep logging road I find, sometimes touching 4000 rpm, keeps me from having to use the brakes so they stay cool. I'll kick down to first if its really steep, so yeah the RPMs are up there creating a ton of vacuum. LR

Matt T.

'09 Ford Ranger FX4 with a mean owner
Lone Ranger is offline  
post #6 of 11 (permalink) Old 08-26-2010, 02:28 PM
 
shelbyx1's Avatar
 
Join Date: Oct 2008
Location: bonnyville alberta
Posts: 2,401
could it be overfilled,and under heavy useage the fluid will heat up and expand.


a moments silence for the shelbyx,i hope her new owner enjoys as much.
shelbyx1 is offline  
post #7 of 11 (permalink) Old 08-26-2010, 05:16 PM Thread Starter
 
Lone Ranger's Avatar
 
Join Date: Jul 2008
Location: Fernridge, BC
Posts: 712
Send a message via MSN to Lone Ranger
Its never exceeded the max fill mark, and there's actually a fair distance to the cap from there.. thats kinda why its bothering me. LR

Matt T.

'09 Ford Ranger FX4 with a mean owner
Lone Ranger is offline  
post #8 of 11 (permalink) Old 04-03-2011, 09:53 PM
 
Join Date: Nov 2008
Location: Toronto, Ontario
Posts: 40
It's been some time since I visited this site, and I know it's been some time since this thread was active, but it caught my eye and I thought I would reply since I had a somewhat similar experience with brake fluid "leaking" past the reservoir cap.

Anyway, here goes:

My problem with leakage from the cap was the result of going into and out of various underground parking garages - at the time I was working as a property manager and was constantly visiting various condo sites, some of which had some pretty steep ramps/inclines to the parking areas.

At no time was the reservoir past the "MAX" mark, but it seems intuitive that braking at the bottom of a steep incline could "splash" brake fluid onto the cap, and that conceivably some of it could leak past the gasket and cap since that seal is not absolutely tight.

My solution (to prevent the brake fluid from dripping into the engine bay - all kinds of potential problems with that - brake fluid being highly flammable as well as corrosive) was to fashion a "bib" (just some old cloth) that I tie around the brake fluid reservoir.

My belief is that it was the inclines that were the direct cause of the drips/leaks I experienced.

I would assume that any hard manoeuvres (braking, acceleration, turning, for example, as well as inclines, or combinations thereof) could also account for a similar experience.

'03 Ranger Supercab, 4x4, 4.0 liter SOHC V6, auto, FX4 Off Road Package (Level I)
north44 is offline  
post #9 of 11 (permalink) Old 04-03-2011, 10:07 PM Thread Starter
 
Lone Ranger's Avatar
 
Join Date: Jul 2008
Location: Fernridge, BC
Posts: 712
Send a message via MSN to Lone Ranger
Ford replaced the cap (albeit with a little bit of grumbling from the service manager) but it hasn't leaked a drop since. I drive through some pretty crazy offhighway roads and trails, and that involves a serious bit of off camber and sketchy angles. The fact that original cap leaked and not the replacement tells me that Ford's internal QC isn't as good as it should be, as in its not exactly that difficult to make a cap seal to a container properly. Maybe its time they use larger or wider seals then..

Like you mentioned, yes brake fluid is very corrosive and flammable and to top it off it also lifts the paint on the firewall underneath the master where it leaks. Its not only bad looking, but its also dangerous (Google burning Broncos due to leaking masters, as an example). LR

Matt T.

'09 Ford Ranger FX4 with a mean owner
Lone Ranger is offline  
post #10 of 11 (permalink) Old 04-04-2011, 12:42 AM
 
b4000's Avatar
 
Join Date: Feb 2009
Location: Northeastern BC
Posts: 996
I agree with LR. The brake fluid reservoir shouldn't be leaking under any circumstances, up to and including rolling the truck. If an underground parking ramp is enough to make it leak, then there's definitely a problem with the way the cap, reservoir, and accordian seal are mating up.

Another good reason to have that looked at, besides brake fluid leaking out -- is moist air leaking in. Brake fluid is hygroscopic -- it absorbs water from air. Not good in a sealed hydraulic system. Also, keep in mind the reservoir is at atmospheric pressure. That expandable accordian seal under the cap, allows the reservoir to maintain atmospheric pressure, while isolating the brake fluid from the actual atmosphere. So, if you see brake fluid escaping out of the reservoir, then it stands to reason that air can also get into the reservoir where the brake fluid sits, possibly resulting in moisture contamination over the long run.

If Princess Auto were a real girl, I'd ask her to marry me.
b4000 is offline  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Brake Fluid Change JTSF150 Wheels and Tires 5 07-29-2010 09:31 PM
Rear End Leaking :( funford F-150 2004 to 2008 Forum 8 09-01-2009 03:07 PM
distributer cap rangerdude Truck/SUV Talk 1 05-18-2009 04:16 PM
Rear end leaking Bruicer Driveline and Transmission 3 04-01-2009 11:09 PM
brake signal wire for electronic brake controller krazykanuk Ranger Forum 6 04-17-2008 10:00 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome