If there’s one engine family that completely rewrote the rules for affordable horsepower, reliability, and aftermarket support, it’s the GM LS engine...
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.
A smoking turbo does not always need rebuilding. Restricted oil drainage, crankcase pressure and installation errors can force oil through a healthy turbo.