Product features

  • material: premium plus carbon steel, polyethylene
  • surface finish: chrome plated according to ISO 1456:2009
  • Dimension of box: 321 x 198 x 54


  • enables the removal of valve seals without removing the head of the motor
  • accessories for assembling pins from fi 5mm to fi 9 mm
  • the accessories cover the following dimensions of spark plugs M10x1, M12x1.25, M14x1.25 and M18x1.5
  • accessories for removing pins diameter fi 8mm, fi 13 mm and fi 16 mm
  • accessories for assembling seals fi 12 and fi 14mm


  • The individual piston is set into a lower position. In the place of the spark plug, an attachment for the pressure pipe is connected; the cylinder is filled with compressed air, which enables the valves to stay in the upper position.
  • Find an appropriate attachment for pulling the pin, set it onto the cover of the spring, straighten the magnets with pins and press the springs by pushing with your hand.
  • This enables the pins to be removed from the groove of the valve.
  • Remove the cover and the springs.
  • Take the valve seal removal pliers art. 2201/2BI, pull out the seals, take the accessories for assembling the seals, place the new seals.
  • Place back the springs and the cover; place the pins and use the accessories for assembling the pins to compress the springs by hand, which enables the placement of the pins back onto the valve.
  • Repeat the same procedure on all other valves, then remove the accessories for the pressure pipe and repeat the procedure on the next cylinder
* Images of products are symbolic. All dimensions are in mm, and weight in grams. All listed dimensions may vary in tolerance.

Usage (pictures)

Usage (Video)

  • Surface protection

    Tools are made of excellent steel improved composition. Several models come with additional chrome surface protection.
  • New advanced technology

    The use of new technological methods and top quality materials result in tools with a long life span, safety designs ensure repair jobs without damages, customized solutions, excellent effectiveness, modern materials and ergonomic design provide good looks and safe use.
  • Top Quality Materials

    The well-thought-out design and precise manufacture prevent damage to the objects being worked on even under a substantial load. With these characteristics, the effective Unior tools are the right selection for craftsmen who require quality and durable tools with a long service life.