Chain tensioner. Porsche 911 1968-83 / 930

Timing Chain Tensioner / Chain Adjuster. Standard type not the upgrade type.
The timing chain tensioner product code 930 105 053 04 is a precision-engineered, direct-fit replacement for the original mechanical tensioner used in early air-cooled Porsche 911 and 930 engines. Designed to maintain consistent chain tension, it effectively reduces slack, minimizes noise, and ensures precise valve timing under all driving conditions. Built to original Porsche specifications with durable materials and exact geometry, this OE Match unit delivers long-lasting reliability and prevents premature wear of the timing components.
Sold each. Fits Left or Right Side

Fits:
Porsche 911 1968 - 1983
Porsche 930 Turbo

Diagram ref no 10

•  Position: Mounted to the engine block in the timing chain system
•  Function: Acts as a spring-loaded or mechanical adjuster to eliminate chain slack, control vibration, and maintain chain alignment
•  Symptoms of Failure: Chain rattle, timing inaccuracy, engine noise
•  Benefits Prevents: chain slack, reduces wear, restores quiet and accurate timing performance
•  Installation: Direct-fit replacement – compatible with original guides and sprockets

A worn or failing chain tensioner can lead to chain slack, rattling noise, timing variation, and accelerated wear of chain guides, sprockets, or shafts.

Replace the tensioner when:
•  Rebuilding or disassembling the engine
•  Noticeable noise or slack in the timing chain
•  During preventive maintenance on high-mileage engines

Using high-precision replacement restores proper tension, reduces noise, and protects your timing system components.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

93010505304

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