HBS047 HOLDEN HEAD BOLT SET
Description
HBS047 Permaseal Head Bolt Set
Compatible Engines: C12NZ Holden 1196 I4 Petrol 1990-1997 C14NZ Holden 1389 I4 Petrol 1994-1997 C14NZ Holden 1389 I4 Petrol 1994-1997 C14NZ Holden 1389 I4 Petrol 1994-1997 C14NZ Holden 1389 I4 Petrol 1994-1997 C16SE Holden 1598 I4 Petrol 1996-1998 C14SE Holden 1389 I4 Petrol 1997-2000 C14SE Holden 1389 I4 Petrol 1997-2002
Compatible Vehicles: Holden Barina SB 1994-1997 Holden Barina SB 1994-1997 Holden Combo Van 1994-1997 Holden Astra TR 1996-1998 Holden Vita SB 1999-2000 Holden Barina SB 1997-2000 Holden Combo SB 1997-1999 Holden Barina SB 1997-2001 Holden Combo SB 1997-2002 Holden Vita SB 1997-2000
These engines use Torque To Yield (TTY) head bolts in the cylinder head, also known as stretch bolts, angle torque, torque to turn, wasted or stretch bolts, which are only able to be fit once.
TTY head bolts are used on many engines to clamp the cylinder head to the block. They differ from ordinary head bolts in that TTY bolts are designed to stretch slightly when they are tightened down. TTY head bolts help to ensure even clamping forces across the head gasket to provide a better seal.
TTY head bolts require somewhat less torque when they are tightened than a conventional head bolt. This helps reduce distortion in the cylinder bores, meaning less blowby past the piston rings, lower emissions and better compression.
This is old stock, packaging may be open, damaged or faded - this does not affect the quality of the item