Timing Chain, Oil Pump / Crankshaft. Porsche 991.1 R / GT3 RS 4.0L 2015-16  ❭  9A110523391

Timing Chain, Oil Pump / Crankshaft.
The PORSCHE Timing Chain, Oil Pump / Crankshaft 9A110523391 is a genuine Porsche internal engine drive component designed to transfer mechanical rotation between the crankshaft drive system and the engine oil pump on compatible Porsche applications.

Fits:

• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16 

 
Diagram Ref No 2

The oil pump must operate continuously while the engine is running to circulate lubricant to critical internal components. This chain provides the mechanical drive required for that operation, helping maintain dependable engine lubrication and protection of bearings, timing components and other moving surfaces.

Although designed for long service life, continuous mechanical loading, heat, friction and lubrication conditions can gradually cause wear to the chain and associated components. Excessive chain elongation or damage can create slack, abnormal noise and, in severe cases, compromise the mechanical drive to the oil pump.

What This Product Does:
The chain transfers rotational movement from the crankshaft drive system to the engine oil pump.

As the engine rotates, this mechanical drive allows the oil pump to circulate engine oil through the lubrication system.

Reliable oil circulation supports lubrication of critical components such as:

• Crankshaft bearings
• Connecting-rod bearings
• Camshaft and valvetrain components
• Timing chains and sprockets
• Timing-chain guides and tensioners
• Other internal moving components and friction surfaces

The chain itself does not generate oil pressure. Its purpose is to mechanically drive the oil pump. The pump, pressure-control system and lubrication circuit are responsible for producing and regulating oil flow and pressure.

Symptoms Of Wear Or Failure:
Possible symptoms of deterioration within the chain or associated drive system include:

• Metallic rattling or clattering
• Mechanical chain noise from the engine
• Noise that changes with engine RPM
• Rattle during engine start-up
• Excessive chain slack
• Chain elongation
• Excessive chain movement
• Visible wear to chain links or pins
• Abnormal sprocket wear
• Worn or damaged chain guides, where fitted
• Excessive tensioner travel, where applicable
• Metal or plastic debris in the engine oil
• Wear debris found in the oil filter
• Oil-pressure warning light
• Low oil-pressure warning message
• Oil-pressure-related diagnostic faults
• Abnormal engine noise associated with inadequate lubrication

An oil-pressure warning does not automatically mean the chain has failed. Low oil level, oil pump wear, a blocked pickup, pressure-regulation faults, excessive bearing clearance, incorrect oil or a defective pressure sensor can produce similar symptoms.

Why Replacement Matters:
The Timing Chain performs a critical mechanical role within the engine lubrication system.

Replacing a confirmed worn, elongated or damaged chain can help:

• Restore reliable oil pump drive
• Maintain dependable engine oil circulation
• Reduce excessive chain slack
• Reduce abnormal mechanical noise
• Restore reliable sprocket engagement
• Protect associated sprockets
• Protect chain guides and tensioning components
• Reduce the risk of chain derailment
• Reduce the risk of chain breakage
• Support correct engine lubrication
• Protect bearings and other internal components
• Reduce the risk of lubrication-related engine damage

Because reliable lubrication is fundamental to engine operation, confirmed wear or damage within the oil pump drive system should not be ignored.

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