The average cost for a Porsche 911 timing chain tensioner replacement is between $1,042 and $1,269. Labor costs are estimated between $864 and $1091 while parts are priced at $178. Estimate does not include taxes and fees. Note about price: This service is typically done as part of a bigger, more ... Genuine Porsche Parts & Accessories For Sale. As the parts department of Porsche Delaware, Delaware Porsche Parts is dedicated to bring your and Porsche Drivers across the nation the quality OEM auto parts and accessories they need to repair and restore their Porsche. The information in this site is intended to be a resource guide for the Porsche community. We want to provide 996 owners with knowledge, support and resources for maintaining and restoring their cars. We also want to provide other Porsche (non-996) owners and Porsche fans with information about the state of affairs of the 996 model line. With the tensioner removed, you should have enough slack to push on the chain sprocket (purple arrow) with your hand. Gently tap the sprocket on the rest of the way using a rubber mallet (inset photo). If you have the Porsche factory chain tensioner tool 9599, then install it into the bottom of the case. The 911 Targa continued with the all-new 996-model and gained a lifting hatchback glass window. This, in turn, was used on the later 997 model of 911. After time, some of them can go wrong and here at Precision Porsche we are highly experienced at fixing Porsche 993, 996 and 997 Targa roofs.