INA PREMIUM TIMING CHAIN KIT W/ GEARS FOR BUICK LACROSSE ALLOYTEC SIDI LY7 LF1 LLT LFX 3.0L 3.6L V6These V6 engines are renowned for defective timing chains. That dreaded rattle at idle or a random check engine light could be the tell tale signs that the factory chains have stretched. Prolonging the replacement of these chains could potentially lead to severe engine damage including bent valves, damaged pistons or worst case, an engine replacement. Here at Mace Engineering we're dedicated to providing exceptional service and quality parts,