Q: Q: Brake fluid leaking

asked by on

Did a brake job on my 2003 F350. Had to replace a caliper. I now have a brake fluid leak. It looks like it is coming from the bottom side of where the brake line attaches to the caliper. There is what appears to be a brass washer between the bolt & the brake line fitting, which seems to be OK. The leak is coming from the bottom side of the fitting, where it sits on the caliper. There is no washer or anything. That's where the fluid seems to be coming from. I have tightened the fitting very, very tight, but it still leaks. Thanks.

My car has 56000 miles.
My car has an automatic transmission.

Hi there. There are two copper crush washers, one on each side of the banjo fitting (the "banjo" is the segment of the brake hose that the bolt is put through). The reason it is leaking is you appear to have left off the second copper washer between the caliper and the bottom of the banjo.

The copper washers are never re-usable. Simply install two new copper crush washers - one on each side of the banjo - and torque the bolt to exactly 26 ft lbs. using a calibrated torque wrench.

If you undertighten the bolt it will leak. If you overtighten it, it will leak and you will distort or break the bolt and crush the banjo fitting. If you believe you have overtightened the bolt in trying to stop the leak, simply buy a new bolt so that when you torque it to 26 ft. lbs. with the new washers the bolt doesn’t break off in the caliper. Obviously, it is a special hollow-drilled bolt but the parts stores do carry them. If you need further assistance handling this brake fluid leak, a qualified professional from YourMechanic can come to your location to have this resolved.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Brake fluid leaking

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I am finding it hard to believe that I am getting quoted $460 ford a rear bundle rear section evap system hose.

A problem, in your circumstance, is if you let you the check engine light stay illuminated, by failing to address this EVAP leak, you will not in the future get notice of new issues if they arise. Fault codes will...

Q: Gasoline smell

Hello there. Evaporative system leaks are not unusual. Many different faults can cause a fuel vapor leak and they can be notoriously hard to locate without specialty tools. Fuel vapor leaks that you can smell are usually smaller than the...

Q: Is a leaky brake booster unsafe if fluid level is o.k.?

If your brake booster is leaking but your brake fluid level is full, your brake booster would be leaking vacuum. This would mean that your booster has a crack, the check valve is bad, or the hose that connects to...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...