Before installing the cylinder heads, check the LS1 block deck for warpage. Our LS engine reference specifies maximum flatness of 0.004 inch within 6 inches and 0.008 inch across the deck.
That little 16mm plug at the front of an LS1 block isn't optional. Here's where the front oil-galley expansion plug goes, how it's oriented and why it should be removed for block cleaning and replaced during final assembly.
McLaren is accepting final 750S orders before production ends in 2027. Its retirement closes a decade of development rooted in lightweight construction, twin-turbo V8 power and hydraulic steering.