8 X 1978-85 Mercedes 300 CD D SD TD Cylinder Head Bolt 12 X 140 mm 12 Point XZN

Qty. 8 Premium Febi Bilstein 12 mm X 140 mm XZN 12 Point Cylinder Head Bolt for 1978 - 1985 Mercedes 300CD, 300D, 300SD & 300TD, 615 990 03 12

• "Using new head bolts when performing a cylinder head installation is always a good idea however, on late-model engines that came from the factory with TTY (torque-to yield) head bolts, replacement is an absolute necessity. TTY bolts are designed to exert the maximum clamping force for a tight head gasket seal, however they permanently stretch and could fail if re-used."

• This is a set 8 of the M12 X 1.75 X 140 mm 12 point XZN later style cylinder head bolts.
  
  
• These will fit select models of the 1978 thru 1985 Mercedes OM617 300CD, 300D, 300SD and 300TD Diesel engines, PLEASE see the application fitment table to verify fit and quantity used.
  
  
• These bolts also use a washer, which must also be used.
  
  
• We also sell the following items:
  
  
  • M12 X 120 mm cylinder head bolt.
    
    
  • Head bolt washer.
    
    
  • XZN 12 point drive socket head tool.