{"product_id":"used-denso-hp3-high-pressure-diesel-fuel-injection-pump","title":"Used Denso HP3 high-pressure diesel fuel injection pump","description":"\u003ch2 data-path-to-node=\"0\"\u003eUsed Denso HP3 High-Pressure Diesel Fuel Injection Pump\u003c\/h2\u003e\n\u003cp data-path-to-node=\"1\"\u003eThe Denso HP3 is a widely utilized high-pressure common-rail diesel injection pump, common in light-to-medium duty diesel engines (often found in applications such as Toyota, Mitsubishi, and various industrial equipment). Because this is a high-precision component that handles extreme internal pressures (exceeding 20,000 PSI in some configurations), its condition is critical to engine performance and longevity.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"3\"\u003eKey Technical Considerations for Used Units\u003c\/h3\u003e\n\u003cul data-path-to-node=\"4\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,0,0\"\u003e\u003cb data-path-to-node=\"4,0,0\" data-index-in-node=\"0\"\u003eInternal Wear Components:\u003c\/b\u003e The HP3 relies on internal roller shoes, plungers, and a camshaft. In used units, these surfaces are prone to \"metal-on-metal\" wear, which can introduce metallic debris into the fuel rail and injectors, potentially causing catastrophic secondary failure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,1,0\"\u003e\u003cb data-path-to-node=\"4,1,0\" data-index-in-node=\"0\"\u003eSeal Integrity:\u003c\/b\u003e Used pumps often sit for extended periods, causing internal O-rings and gaskets to dry out or crack, leading to external fuel leaks or internal pressure loss upon re-installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,2,0\"\u003e\u003cb data-path-to-node=\"4,2,0\" data-index-in-node=\"0\"\u003eSolenoid\/SCV Condition:\u003c\/b\u003e The Suction Control Valve (SCV) is the primary electronic controller for fuel volume. These are frequent failure points; if testing a used pump, verify that the SCV does not stick and responds correctly to the Engine Control Unit (ECU) signals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,3,0\"\u003e\u003cb data-path-to-node=\"4,3,0\" data-index-in-node=\"0\"\u003eContamination Risks:\u003c\/b\u003e Fuel pumps must be handled in a surgically clean environment. Any particulate matter or water ingress into the fuel intake will immediately compromise the pumping elements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"5\"\u003eInspection Checklist for Used Units\u003c\/h3\u003e\n\u003cul data-path-to-node=\"6\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,0,0\"\u003e\u003cb data-path-to-node=\"6,0,0\" data-index-in-node=\"0\"\u003eShaft Play:\u003c\/b\u003e Check for excessive radial play in the drive shaft, which indicates bearing fatigue.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,1,0\"\u003e\u003cb data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003eFuel Feed Condition:\u003c\/b\u003e Inspect the intake and return ports for metal shavings. If debris is found, the pump is likely nearing the end of its service life.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,2,0\"\u003e\u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"0\"\u003eBench Test Verification:\u003c\/b\u003e A used HP3 should ideally be tested on a certified common-rail test bench to confirm it meets the manufacturer's specified flow and pressure delivery requirements across the full RPM range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PARTS N AUTO","offers":[{"title":"Default Title","offer_id":48309458993364,"sku":null,"price":499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0843\/3634\/5300\/files\/pngwing.com_14_2b0c1064-d082-465f-8d57-b877a92655b3.png?v=1784205701","url":"https:\/\/partsnauto.com\/products\/used-denso-hp3-high-pressure-diesel-fuel-injection-pump","provider":"PARTS N AUTO","version":"1.0","type":"link"}