Master Cylinder Caps
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Master Cylinder Caps Master Cylinder Caps
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Dorman - Help Master Cylinder Caps

Part No. 42042 Warranty Details  

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Our Brake Master Cylinder Caps are engineered for affordability and convenience. Save time, money and labor by replacing only the Cap, instead of the entire Brake Master Cylinder.

Product Features:
  • Constructed of high-quality plastic for lasting durability
  • Available in diverse styles, including threaded and locking
  • Protects braking system by providing a tight seal against the elements
  • A necessary safety item—prevents brake fluid from splashing and/or leaking
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by PowerReviews
Dorman - HelpMaster Cylinder Caps

(based on 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 2 Stars



  • 1 Stars



Reviewed by 2 customers

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Exact Fit


from Northern Indiana

Verified Buyer

Comments about Dorman - Help Master Cylinder Caps:

Manufactured by the same source as GM

  • Was this a gift?:
  • No

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(1 of 1 customers found this review helpful)


just a cap


from confluence pa

About Me Auto Enthusiast, Casual Driver, Truck Enthusiast

See all my reviews

Verified Buyer
3 or more reviews submitted


  • Easy To Install


    Best Uses

    • Everyday Driving

    Comments about Dorman - Help Master Cylinder Caps:

    dont come with rubber seal cap only,,you have to buy seal extra,

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    Do you have questions about this product?


    Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

    1 Question | 1 Answer
    Displaying question 1
    • Q:

      Does this cap have a gasket included?
      Asked on 7/2/2011 by Jeff from Orlando, Fl

      1 answer

      • A:

        no gasket seperate

        Answered on 7/9/2011 by yo from yo
    Displaying question 1

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    Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.