Genuine Porsche 996-105-180-58 Timing Chain Tensioner for Intermediate Shaft

The Genuine Porsche 996-105-180-58 is an OEM timing chain tensioner designed for the intermediate shaft (crankshaft to IMS) application in M96 and M97 flat-six engines. This critical engine component maintains proper tension on the timing chain that synchronizes the crankshaft and intermediate shaft, ensuring precise valve timing and optimal engine performance.

Key Features:

• Genuine Porsche OEM part ensuring perfect fit and function
• Oil-pressure activated hydraulic tensioner design
• Single groove cut into head indicates proper positioning
• Latest revision superseding earlier part numbers 996-105-180-55 and 996-105-180-56
• Professional installation recommended with seal 900-123-147-30 (sold separately)

This tensioner is essential for maintaining timing chain integrity in single-chain M96/M97 engines. Worn tensioners can cause characteristic cold-start rattle due to loss of oil pressure when the engine sits. The tensioner piston can develop scoring over time and mileage, leading to reduced tension control. In severe cases, tensioner failure can result in timing chain damage and potential catastrophic engine failure. Regular inspection and replacement of timing chain tensioners is recommended during intermediate shaft bearing service or when cold-start engine noise develops.