Remount the head and use the stud hole as the centering point for the 15/32-inch punch. Strike the head of the punch with a good amount of force with a 2-pound brass hammer.

Fixing the head gasket failure issue involves adding new ARP head bolts or similar aftermarket head studs. Check near the cylinder head for visible nuts with exposed threading.

Trying to find a definitive answer on when GM finally fixed the head bolt issue is like trying to find an objective answer about who's the alien at the end of John Carpenter's "The Thing". At ...

Kit includes special-length cylinder head studs, as shown. Minor grinding on the Super Duty aluminum water pump is required to provide clearance for the front header flange and adapter cone.

This particular GR Yaris has an upgraded head gasket, new head studs, and the standard turbocharger has been replaced with a Garrett G30-770.