Engine Oil Tank. Porsche 911 2.0L / 2.2L 1965-71

Engine Oil Tank.
Restore correct oil reservoir function on your classic Porsche 911/912 (1965-1971) with this genuine OEM oil tank assembly. Designed for the early air-cooled flat-six engine lubrication system (excluding certain Sportomatic or flap-type variants), this tank ensures proper oil supply, surge protection and system integrity under sporty driving conditions.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1971 2.2L / 2.4L / 2.7L RS LWB (F)

Diagram Ref No 29

What This Product Does:

• In the early 911/912 vehicles, the engine lubrication system often included an oil tank/reservoir separate from the main sump; this tank would hold oil, supply oil to the engine under varied conditions (including the lateral loads in a sports car) and help maintain oil pressure, volume and cooling.
• The tank may also function as part of the dry-sump or semi-dry-sump system: collecting oil from scavenge lines and returning it to be pumped again, or acting as a surge tank to prevent oil starvation under cornering or load.
• Proper oil supply and correct oil tank sizing/installation is critical for engine longevity, especially in sports driving situations where oil slosh, foaming or starvation can cause damage.

Signs You Might Need Replacement:

• Visible damage or corrosion: The tank may show rust, corrosion (especially if made steel) - which could cause leaks or contamination.
  
• Oil leaks around tank fittings, seams or connections to oil lines.
  
• Foaming oil, oil starvation or low oil pressure during vigorous driving: if the oil tank isn’t functioning properly (e.g., internal baffles missing, capacity reduced, internal return lines blocked) you may get oil starvation or pressure drop.
  
• Restoration/project status: On a classic 911/912 from ’65-71, replacing the oil tank with a fresh correct-spec unit is considered good practice during engine rebuild or full restoration to ensure reliability.
  
  

Why Replacement Matters:

• Engine reliability: A correct, undamaged oil tank ensures your lubrication system performs as designed — protecting bearings, cams, cylinder walls, etc.
  
• Prevent further damage: If the tank leaks, is corroded or compromised, you risk oil loss, engine damage or catastrophic failure under load.

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Related, superseded, cross reference or alternative numbers for comparison.

91110700169

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