Plymouth Horizon Proportioning / Combination Valve Replacement at your home or office.

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Proportioning / Combination Valve Replacement Service

How much does a Proportioning / Combination Valve Replacement cost?

On average, the cost for a Plymouth Horizon Proportioning / Combination Valve Replacement is $340 with $245 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1987 Plymouth HorizonL4-2.2LService typeProportioning / Combination Valve ReplacementEstimate$604.17Shop/Dealer Price$736.47 - $1110.85
1980 Plymouth HorizonL4-1.7LService typeProportioning / Combination Valve ReplacementEstimate$584.17Shop/Dealer Price$716.48 - $1090.88
1982 Plymouth HorizonL4-2.2LService typeProportioning / Combination Valve ReplacementEstimate$584.17Shop/Dealer Price$716.48 - $1090.88
1983 Plymouth HorizonL4-2.2LService typeProportioning / Combination Valve ReplacementEstimate$584.17Shop/Dealer Price$716.46 - $1090.84
1986 Plymouth HorizonL4-1.6LService typeProportioning / Combination Valve ReplacementEstimate$584.17Shop/Dealer Price$716.50 - $1090.91
1986 Plymouth HorizonL4-2.2LService typeProportioning / Combination Valve ReplacementEstimate$584.17Shop/Dealer Price$716.48 - $1090.88
1983 Plymouth HorizonL4-1.7LService typeProportioning / Combination Valve ReplacementEstimate$589.17Shop/Dealer Price$721.35 - $1095.64
1983 Plymouth HorizonL4-1.6LService typeProportioning / Combination Valve ReplacementEstimate$589.17Shop/Dealer Price$721.72 - $1096.30
Show example Plymouth Horizon Proportioning / Combination Valve Replacement prices

What is the Proportioning / Combination Valve all about?

Your braking system relies on hydraulic pressure to operate. When you depress the brake pedal, brake fluid is pushed through the system to the wheels. Fluid pressure is responsible for actuating both disc brake calipers, as well as drum brakes. However, there are numerous components in line between the brake pedal and the brakes themselves, including the combination valve.

The combination valve is responsible for metering fluid to disc brakes, as well as fulfilling tasks done by both the pressure differential switch and proportioning valve (which is responsible for reducing the fluid pressure in the lines leading to the rear drum brakes). This is necessary because of how brakes work in terms of lockup – the more weight there is on a wheel, the more force can be applied without locking up the brakes. In rear drum brakes, the weight on the wheel is comparatively small (the weight of the engine on the front wheels is considerable).

Keep in mind:

  • In modern cars that employ combination valves, replacing the entire valve body is necessary if the proportioning valve fails.
  • There is no way to check operation on this type of valve unless it has failed completely.
  • The valve may have failed due to many reasons, including debris in the brake fluid.

How it's done:

  • The defective proportioning combination valve brake lines are disconnected
  • The defective proportioning combination valve is removed from the vehicle
  • The new proportioning combination valve is installed and the brake lines are connected to valve
  • The brake system is bled and purged of air in the system and the brake fluid is refilled
  • The vehicle is road tested for proper brake operation

Our recommendation:

Follow your automaker’s recommendations on brake system service to ensure that the fluid remains in good condition and free of debris. Have your braking system maintained by our expert mechanics to ensure that any potential problems are caught as soon as possible. Driving with a failing proportioning valve puts you at increased risk.

What common symptoms indicate you may need to replace the Proportioning / Combination Valve?

  • Rear brakes lock up easily, particularly on wet pavement

How important is this service?

While it is still possible to drive with a failed or failing proportioning valve, it’s not recommended because it decreases your safety while increasing the risk of being involved in an accident because your rear brakes lock up under even light loads. Have the entire combination valve assembly replaced immediately.

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Rating Summary
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Jose

17 years of experience
433 reviews
Jose
17 years of experience
Plymouth Acclaim V6-3.0L - Brakes, Steering and Suspension System - Vancouver, Washington
Friendly and knowledgeable. Found the issue with our brakes fast and got us safe and back on the road. He's our new mechanic!

Nicholas

11 years of experience
597 reviews
Nicholas
11 years of experience
Plymouth Grand Voyager V6-3.3L - Oil/Fluid Leak - Fuquay Varina, North Carolina
Was great and explained our options.

David

27 years of experience
182 reviews
David
27 years of experience
Plymouth Reliant L4-2.2L - Fuel Pump - San Francisco, California
David's first step was to diagnosis the reasons for the old car failing to start. He applied a systematic and thorough approach in order to reach a reasonable conclusion that he had found the faulty part. He was tireless and not a minute of the time he spent on the car was wasted. David then came back to 'finish the job." His analysis was a faulty fuel pump and/or filter. He brought the needed parts and after an arduous bout working under the car (rear has to be lifted), he tool out the old and put in the old..including new fuel hoses. Today..I stepped into the car which was parked outside all night and when I turned on the ignition switch, the engine started immediately. I have since used the car on several trips and I must say it sounds and feels like a new version of an old car. What's amazing, is that when I turned the ignition key on, the engine responds immedately and is ready to go. In the past, it stammered, sputtered, cranked until I finally gave up. So in looking back, to use an analogy, it needed a new "heart" for the old one was no long pumping. I hope this story gives you a decent picture of why I hold David and his work in such hi regard. I will call upon him again, especially with this old car, some time in the future.

Lucas

21 years of experience
893 reviews
Lucas
21 years of experience
Plymouth Caravelle V8-5.2L - Car is not shifting into park - Los Angeles, California
Friendly, polite and easy going.

Excellent Rating

(156)

Rating Summary
143
5
1
1
6
143
5
1
1
6
Number of Plymouth services completed
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services done by our mechanics
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