21458307 Overflow Valve | Genuine Volvo Penta Part

🔧 Product Description

A calibrated fuel-system valve controlling return flow and residual pressure in the assigned Volvo Penta diesel fuel circuit.

⚙️ Key Features

• Calibrated opening pressure
• Maintains fuel-gallery pressure
• Controls excess fuel return
• Precision threaded installation
• Replaces earlier Volvo references

🔌 Function

The valve maintains the required fuel pressure while allowing excess fuel and air to return through the fuel circuit.

⚠️ Common Signs of Failure

• Low fuel pressure
• Unstable idle
• Engine loses power under load
• Excessive return flow
• Valve stuck from contamination

🛠️ Service Notes

• Treat it as a sealed, non-adjustable unit — renew it rather than attempting to clean, shim or adjust the internals
• Work clean: cap the openings, wipe the area down before opening the fuel system, and do not let dirt or fibres into the fuel side while the valve is off
• Renew the sealing washers, O-rings or gasket that come with the valve, and never reuse a crushed copper or aluminium washer
• Tighten to the figure in the workshop manual for your engine; these valves screw into fuel housings and heads that strip readily
• Bleed and prime the fuel system as the manual for your engine describes, then run the engine and check the joint for weeping under working pressure

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21458307 → Supersedes 21022032 → Supersedes 20715052

OEM / Related Numbers

• 21022032 earlier number superseded by this part
• 20715052 earlier number superseded by this part

Aftermarket / Verified Equivalents

• LASO 9809 1501 - Fuel pressure and overflow valve
• DT Spare Parts: 2.12371
• DT Spare Parts: 2.12371SP
• Sampa: 092.341
• Febi Bilstein: 171293
• Auger: 81082
• Trucktec Automotive: 03.38.026
• PAI Industries: 840071
• Most Diesel: MDE06
• D.TEC: 0103.070

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging