Tag: Gen III LS1

LS1 cylinder head alignment dowels locate the heads accurately on the block before the fasteners are tightened. Learn where all four dowels install, how to seat them and why damaged or missing sleeves should never be ignored.

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.