This head gasket kit, also known as a decarbonizing gasket kit, includes the head gasket with а reference 1378646, 1326785, 1332644. The cylinder head bolts with reference 1317761, 1326239 should be replaced when needed[1], and tightening should be performed in three stages with bolts lubricated.

Tightening torque settings:

• 20 Nm 15 lbf. ft.
• 40 Nm 30 lbf. ft.
• angle tightening 120°

Kindly check the second picture that provides the necessary instructions, directly quoted from the Volvo Penta workshop manual.

[1] The cylinder head bolts should be replaced when there are signs of elongation, or cannot be specified if it is already elongated, by checking the “waist” of the bolt. As a rule of thumb, a cylinder head bolt of these Aquamatic series, cannot be re-used more than five times.

Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870

This product replaces the following manufacturer’s part nr:

• Volvo Penta: 876303, 876071
  
• Orbitrade: ORB21303, 21303
• Sierra: 18-3870
  
• Crom: 121030
• Recmar order number: REC876303

The aforementioned part numbers are used as guidance and belong to their registered trademark owner. Our product is a replacement (non-OEM) product compatible with these references.

• What is the current price of the Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870?

  The current price of the Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870 is 144.9 US Dollars, but may vary depending on the supplier and availability. Please visit the product page or contact Poseidon Marine for the latest pricing and stock updates.

• Is the Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870 an OEM (Original Equipment Manufacturer) or aftermarket product?

  The Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870 is available as a high-quality aftermarket replacement equivalent to OEM standards, offering excellent durability and performance for marine engines.

• What is the manufacturer or supplier of the Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870, and where is it made?

  The Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870 is supplied by Poseidon Marine, sourced from reputable European manufacturers such as Recmar®, designed and tested for marine-grade reliability.

• Does the Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870 come with a warranty or satisfaction guarantee?

  Yes, all Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870 kits come with a standard Poseidon Marine warranty covering manufacturing defects and material quality. Please refer to the warranty section for details.

• How does the Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870 comply with manufacturer specifications and industry standards?

  The Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870 meets or exceeds OEM specifications, ensuring proper fit, performance, and compliance with ISO and SAE marine standards.

• Where can I get technical support or detailed installation instructions for the Recmar® Head Gasket Set Volvo Penta 251A AQ171A AQ171C 876303 876071 18-3870?

  You can access detailed technical guides and installation manuals from Poseidon Marine’s official website or contact their support team for expert assistance.