Payen HBS285 Cylinder Head Bolt Kit M10 x 1.25 166mm Male Hex 10-Piece Set

The Payen HBS285 is a complete cylinder head bolt kit engineered as an OE-quality replacement for a range of Chevrolet and Daewoo engines. This kit provides the critical fasteners needed to properly secure the cylinder head to the engine block, ensuring a reliable, leak-free seal at the head gasket interface.

Key Features:

• Kit Contents: 10 cylinder head bolts per set
• Thread Size: M10 x 1.25mm pitch
• Bolt Length: 166mm
• Head Design: Male Hex for standard torque wrench installation
• OE Replacement: Manufactured to original equipment specifications for precise fit and clamping force
• Brand: Payen — a trusted European engine sealing and fastener specialist

Installation Notes: Cylinder head bolts are safety-critical fasteners. Always tighten in the manufacturer-specified sequence and torque values using a calibrated torque wrench. It is strongly recommended to replace head bolts rather than reuse old ones, as previously torqued bolts may not generate adequate clamping load due to stretch, corrosion, or wear.

Cross-reference part numbers include: AJUSA 56008900, ASHUKI T85101, BLUE PRINT ADT36724, REINZ 70-52581-00, and PAYEN JN706.