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Starting at $116.95, AutoBuffy stocks 1 diesel high pressure oil pump seal kits from Standard Ignition. This kit replaces the seals and O-rings that keep high-pressure oil contained within the HEUI injection system. When these seals fail, injection pressure drops, causing hard starts, misfires, and potential engine damage from oil starvation to the injectors.
The most important decision is whether to choose an OEM-equivalent kit with every seal and O-ring needed for a complete job, or a partial kit covering only the most common failure points. Material quality matters here — Buna-N rubber handles standard operating temperatures, while Viton seals hold up better to extreme heat cycles and degraded fuel contamination.
| Option | Best for | What you get |
|---|---|---|
| OEM-Equivalent Complete Kit | Full pump reseal, high-mileage engines, preventing a comeback job | Every seal, O-ring, and gasket needed to fully rebuild the pump and surrounding connections |
| Viton Seal Upgrade Kit | Engines with a history of overheating, biodiesel use, or repeated seal failure | High-temperature Viton O-rings and seals with superior chemical and heat resistance over standard rubber |
| Partial / IPR Seal Kit | Targeted repair when only the ICP or IPR valve area is leaking | Seals specific to the injection pressure regulator or sensor port, at a lower cost than a full kit |
| OEM Dealer Kit | Owners who want exact factory specification materials and part matching | Manufacturer-sourced seals with guaranteed dimensional accuracy, typically at a higher price point |
Depressurize the oil system and thoroughly clean the pump housing area before disassembly to prevent contamination from entering the high pressure circuit. Lubricate all new O-rings with clean engine oil before installation, and seat each seal carefully to avoid nicks that cause immediate re-leakage. After reassembly, use a scan tool to confirm injection control pressure builds correctly before returning the vehicle to service.