Shop 1991 Buick Century Engine Timing Chain Tensioner. CT6; Left. CAMSHAFT, Crankshaft - OEM Buick Part # 12691835

Engine Timing Chain Tensioner. Tensioner Assembly - Timing Chain.
Adjuster. An oil pressurized Tensioner that keeps the Chain that runs from the crankshaft to camshaft or the Chain that runs from camshaft to camshaft, from becoming loose and jumping a tooth or more causing Engine damage or out of sync crankshaft to camshaft Timing.

Engine Timing Chain Tensioner

Fits CT6

CT6; Left.