REGION: LANGUAGE:
My Account Briggs & Stratton My Cart (0)
Frequently Asked Questions

To search the Frequently Asked Questions (FAQs), enter your search terms or questions in the box below. Not sure what to search for, browse by category by clicking the Browse tab. If you still need help, you can submit your question by clicking the Ask a Question tab. Our Answer Center will respond to your question within 3 business days.

Search Frequently Asked Questions

Valve Seat Popped Out of Engine Block

The valve seat has popped out of the engine block. How can this be repaired?

This failure usually occurs due to an overheating issue. Overheating is a cause of engine failure from an engine component material that has distorted beyond a specific yield point. The yield point is the limit of a material at which it can be exposed to heat or mechanical stress and still return to its original size and chemical composition. Overheating occurs from causes such as a lean air-fuel mixture, use of improper fuels, dirt and/or debris buildup on cooling fins, damaged cooling system components, reduction in cooling air, over speeding, or an improper engine enclosure.

Valve seat inserts are installed in the cylinder block using a press fit. A press fit is a method of attaching two mating components where one component is pressed into a machined hole having a slightly smaller diameter than the component inserted. Valve seat inserts are commonly .003” - .005” larger than the machined hole in the cylinder block. The pressed fit retains the valve seat insert in position with a constant force. This force is necessary as small engine have significant responses to heat generated in the combustion process. If the cylinder block expands past the yield point, the force is not present to keep the valve seat in place.

In some cases the valve seat can be peened back into place. However, there is no guarantee this type of repair will add significantly to the engine's life. To determine if this procedure may work in your situation, please consult a Briggs & Stratton Authorized Dealer. This Service Dealer has all the information relating to Briggs & Stratton warranty information, engines, short blocks, parts, prices, service, specifications, proper fit, etc. To find our "Best-of-Class" dealerships, look for our Master Sales & Service Dealers (MSSD).



Back to Search Results

Our user community provides a place for users to ask and answer questions of one another. Our staff also participates in this community on a regular basis. Please note that your question may take more than 24 hours to appear. If you are in need of an immediate answer please review our frequently asked questions or contact a local service dealer .

* Indicates a required field.

Please complete the form below to contact us with your question. Provide as much information as possible. We make every effort to personally answer all questions within 3 BUSINESS days. If you are in need of an immediate answer please review our frequently asked questions or contact a local service dealer.

* Indicates a required field.





  • Enter any equipment model numbers you may have


  • Look for STAMPED B&S ENGINE NUMBERS


    STAMPED - YYMMDDxx Identifies Manufacture date


  • 5HP=5, 18-1/2=18.5, 25=25.00


    Series (3 digits) or Torque (ft. lbs)


  • Quantum, Intek, Classic, Sprint, etc.


    Manufacturer of the Tractor, Generator, Lawn mower, etc.


  • What kind of product is the engine coupled to?


    Where was the equipment purchased?


  • When product was purchased. Format: mm/dd/yyyy.

Personal Information












  •  


  • Zip + 4 xxxxx-xxxx Canada use xxx xxx format




  • format: xxx-xxx-xxxx  




  • Would you like to create an account with us?


    Would you like to receive updates and other info from us?




0 Items in Your Cart

Estimated Price: 0.00