This repair kit contains essential seals, O-rings, and potentially small internal components needed to restore a Delphi fuel injection system to proper working order for Volvo FH12 trucks. It is manufactured to meet the high standards required for diesel fuel systems, ensuring a reliable seal and consistent fuel delivery, unlike a worn or damaged seal which can lead to leaks and performance issues. Symptoms of a failing seal within the injection system include fuel leaks, hard starting, rough idling, or a noticeable drop in engine power.
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Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.
The initial symptom of a failing seal in the fuel injection pump is often a slight fuel odor around the engine or visible fuel weeping from the pump housing. If left unaddressed, these leaks can worsen, leading to a significant loss of fuel pressure, difficulty starting, rough engine operation, and a reduction in overall power. Continued leakage poses a fire risk and can lead to costly damage to the injection pump and surrounding engine components.
Thoroughly clean the injection pump housing and all mating surfaces before installing the new seals to ensure a proper seal and prevent leaks. Ensure all small O-rings are correctly seated in their grooves before reassembling the pump components.
When rebuilding a fuel injection pump with this kit, it is advisable to inspect the drive shaft and associated components for wear.