Hey how ya doing.
The timing chain tensioner is located on the left side of the engine. It is between the Power Steering pump, and the engine, mounted to the Timing case.
Turning this bolt clockwise will increase the chain tension.
Do not over tighten it as you may damage the chain guides. Also, watch for leaks from the bolt. You may need to change the seal.
CAUTION: Slippery When BOOSTING!