F00RJ00436

Genuine Bosch high-pressure connector tube for the 5.9L Cummins common rail . This is the steel tube that carries fuel from the rail, through the cylinder head, into the injector, sealing metal-to-metal at both ends. Six are required per engine , one per cylinder. Fitment Dodge Ram 2500 & 3500, 2003–2007, Cummins 5.9L — injectors 0986435503 and 0986435505 2004 is a split year. Check the CPL number on the engine data plate to identify the correct injector: CPL 8213, 8228 or 8412 takes 0986435503; CPL 8346, 8347, 8350 or 8351 takes 0986435505. The connector tube is the same either way. The 5.9L tube has a smaller inner diameter and a more domed sealing tip than the 6.7L part. A 5.9L tube must never be fitted to a 6.7L engine. Replaces these part numbers Cummins 3979419 · Mopar 5086867AA · Mopar 5175565AA · Bosch F00RJ00436 · Bosch F00RJ01224 · 10763 · 522043 · DEC031874 · DIS3 Why it has to be replaced The sealing tip of a connector tube deforms slightly under torque and takes a permanent impression from the injector it was clamped against. Fit that tube to a new injector and the impression no longer matches, which leaves a leak path at the highest-pressure point in the fuel system. Bosch and Alliant Power both specify replacing all six every time injectors are serviced. A tube can look perfect and still be finished. What is worn out is a shape you cannot see. Symptoms of a failed connector tube Fuel in the valve cover — the most common sign Rising oil level and a diesel smell on the dipstick as fuel dilutes the oil Hard starting, particularly when hot A miss on one cylinder that follows the tube rather than the injector Raw diesel smell after a hard pull with no visible external leak Warranty and shipping Valley Fuel Injection has been a Bosch factory-authorized diesel service center since 1993. We ship nationwide from Woodland, California, typically within 1–2 business days. See our warranty terms and shipping policy . Not sure which tube your engine takes? Call (530) 668-0818 with the year and application and we will confirm it.