Hello, I noticed a few brake fluid on the brake fluid reservoir. After a cool city cruise, I open the hood and I can hear some breath from the brake cap. is it normal ? I move the cap and the breath can stop. Do you think the brake cap has a leak ? The car has only 12 000 miles. I have the car since 2 months so everything is new for me. thanks
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2006 Mustang GT Premium, 5-speed,
Boom Tube mufflers, JLT II CAI, SCT X3, BRENSPEED tune,
Fan Blades wheels 18" 255/45R18
Tungsten Grey with Black Stripes, Mirrors & Grille painted, Dark Charcoal interior with Light Graphite Leather, Interior Upgrade & Satin Aluminium inst. panel
This is a problem inherant in most Fords and just about all Mustangs. You can order new caps until you are blue in the face or run out of money and they will all leak. It's pretty dang annoying.
I made a little rubber gasket for mine and that helps.
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2005 Mustang GT with 04 Cobra iron block, 300 ci, Kenne Bell 2.6l twin screw, P&P S3 Heads, SS valves, Comp S3 cams, Currie 9+ 9" rear end and DS (coming soon), Hurst shifter, BMR K-member, A-arms, LCAs & UCA, JBA long tubes & mid-pipe, Accel COPs, GT500 fuel pumps, much more... 659 RWHP, 598 Tq @ 12 psi & 5800 RPM
Thank you
That's really strange to have a leak on a such security part, is it safe ?
Indeed the cap is not to be "screwed". (I am not sure about my english). To close the cap, it turns just a little bit.
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2006 Mustang GT Premium, 5-speed,
Boom Tube mufflers, JLT II CAI, SCT X3, BRENSPEED tune,
Fan Blades wheels 18" 255/45R18
Tungsten Grey with Black Stripes, Mirrors & Grille painted, Dark Charcoal interior with Light Graphite Leather, Interior Upgrade & Satin Aluminium inst. panel
I originally tried the teflon-tape suggestion last year and it worked for a couple of weeks. Then, I ended up just lowering the fluid down to the minimum mark on the reservoir, and I have not had any leaking since. Sure it didn't fix the cap, but it fixed the spillage.
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tom281 Current: 2003 Mach 1: black on black 1992 GT 'vert, original owner
Previous: 2006 S197GT, cover car Modified Mustangs
I originally tried the teflon-tape suggestion last year and it worked for a couple of weeks. Then, I ended up just lowering the fluid down to the minimum mark on the reservoir, and I have not had any leaking since. Sure it didn't fix the cap, but it fixed the spillage.
+1 on this. I removed some of the fluid and I haven't noticed any overflow since. Check the level from time to time to make sure you're at least at the min mark.
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'07 GT Deluxe - Alloy - IUP - Shaker 500 - 3.55 axle
Ordered: April 4, 2007
Build week: April 23
Delivered: May 5
Mods - SSS Adrenaline series mufflers, shorty antenna
Probably my number one complaint. Every week I give it a wipe, and before any shows. What are you going to do.
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07 GT. Exterior mods n/a. Engine mods, see profile.
One of the more powerful cars around.
One of the slower cars around.
Makes me feel like a kid every time.
I fixed mine very simply and cheaply. The problem is the cap doesn't sit tight enough on the top of the reservoir for the rubber seat inside the cap to seal the top. So what I did was to remove the rubber seal from inside the cap, and cut a circle of rubber material to go under the rubber seal. I used the soft rubber material people use under table runners to keep them from sliding. I put the new material in first, then the original seal over it. I've never had a leak, and when the cap is screwed on there's a satisfying click when the cap is engaged.
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'05 Sonic Blue GT w/ '07 V8 engine, 5-sp, IUP, Beige leather interior, nothing else -
just the way I wanted it. (1 of 113)
OK, so I've added a few things to it. Check my Profile - too many to list here.
I fixed mine very simply and cheaply. The problem is the cap doesn't sit tight enough on the top of the reservoir for the rubber seat inside the cap to seal the top. So what I did was to remove the rubber seal from inside the cap, and cut a circle of rubber material to go under the rubber seal. I used the soft rubber material people use under table runners to keep them from sliding. I put the new material in first, then the original seal over it. I've never had a leak, and when the cap is screwed on there's a satisfying click when the cap is engaged.
Nice. I'll be trying that this week. I don't like the teflon idea because of the chance of getting small pieces in the reservior, not good.
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07 REDFIRE GT 5 SPEED 3.55 gears
C&L Racer CAI XCAL2/Seq signals/GTAs/Steeda UDP/CHE K Member Brace W/Torq Links/J&M LCA/Spider DS/PRO.50 Shifter Hurst handle & "T"/Meziere EO2/ARH LT catted H /Prothane MM/Delet Plates/SLP BOSS 429 Scoop/Accel COP/PowerSlot/Hawk Pads/Tokico D-Spec/CHE Panhard Bar Brace/Steeda Adj. Panhard Bar/BMR F/R Sway Bars/Cervini ducktail spoiler/BMR UCA Mount/CHE UCA/GT\CS Rear Cover/AMChrome Bullets 18x9/10s/Nitto 255/45&295/45
Tillman Dyno Tune 307HP/322TQ
Nice. I'll be trying that this week. I don't like the teflon idea because of the chance of getting small pieces in the reservior, not good.
+1 on not using teflon tape. As travelers has already said, getting some of that stuff in your brake system would be bad bad bad.
Also +1 on making a rubber gasket in addition to the one already there. It works. It's too freakin' bad that the army of engineers at Ford could not put their collective pea brains together to come up with a fix for this. They can think of cool stuff like variable valve timing but they can't come up with a cap for a brake fluid reservoir that won't leak. Effen amazing.
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2005 Mustang GT with 04 Cobra iron block, 300 ci, Kenne Bell 2.6l twin screw, P&P S3 Heads, SS valves, Comp S3 cams, Currie 9+ 9" rear end and DS (coming soon), Hurst shifter, BMR K-member, A-arms, LCAs & UCA, JBA long tubes & mid-pipe, Accel COPs, GT500 fuel pumps, much more... 659 RWHP, 598 Tq @ 12 psi & 5800 RPM
They would have to come down to our engeering level to fix simple things like that. Maybe you should do a writeup and send it in to them after you patten it.
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07 REDFIRE GT 5 SPEED 3.55 gears
C&L Racer CAI XCAL2/Seq signals/GTAs/Steeda UDP/CHE K Member Brace W/Torq Links/J&M LCA/Spider DS/PRO.50 Shifter Hurst handle & "T"/Meziere EO2/ARH LT catted H /Prothane MM/Delet Plates/SLP BOSS 429 Scoop/Accel COP/PowerSlot/Hawk Pads/Tokico D-Spec/CHE Panhard Bar Brace/Steeda Adj. Panhard Bar/BMR F/R Sway Bars/Cervini ducktail spoiler/BMR UCA Mount/CHE UCA/GT\CS Rear Cover/AMChrome Bullets 18x9/10s/Nitto 255/45&295/45
Tillman Dyno Tune 307HP/322TQ
brake Fluid Cap leak 2006 Mustang Gt 
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