Tag: LS engine internals

Factory LS1 wrist pins use a press-fit connecting-rod arrangement, while many aftermarket combinations use full-floating pins and retaining locks. Learn how each design works and which measurements matter.

An LS1 crankshaft can look usable while hiding structural damage. Learn how magnetic-particle inspection helps reveal crankshaft cracks and why a cracked LS crank should be replaced.

LS1 crankshaft runout is checked at the No. 3 center main journal with a dial indicator. Learn how to measure crankshaft straightness, identify excessive runout, and determine whether an LS crank may be bent before assembling the short block.

Scratching an LS1 cam bearing during camshaft installation can contribute to reduced oil pressure. Learn how to properly lubricate, support, align, and guide the camshaft through the block without damaging the cam bearings.

Learn which way the **LS1 connecting-rod chamfer should face**, why it must clear the crankshaft journal fillet, and how correct rod orientation helps prevent clearance problems during LS1 engine assembly.

LS1 piston-to-deck clearance is determined by **crankshaft stroke, connecting-rod length, piston compression distance, and block geometry**. Learn how these dimensions affect piston position at TDC and how to measure deck clearance during an LS1 build.

LS1 crankshaft end play should measure 0.0015–0.0078 inch. Learn where the No. 3 thrust bearing is located, how crankshaft end play is measured, and what to check during an LS1 engine build.