Fuel Filter Head ME035672 For Mitsubishi Fuso 6D16 FM516 FM517 FN517

Confirm the OEM number ME035672 on your original fuel filter head before ordering. This is the filter mounting base, not the filter element. Verify thread size for the filter, number of ports, and inlet/outlet orientation. Fits 6D16 engines in FM516, FM517, and FN517 chassis. Professional installation required.

Description: The ME035672 fuel filter head is a mounting and distribution housing for Mitsubishi Fuso 6D16 diesel engines. This component bolts to the engine block or chassis and accepts a spin-on fuel filter. Cast from aluminum alloy, the head contains internal passages directing fuel from the supply line into the filter, then to the injection pump. A built-in primer pump allows manual fuel priming after filter changes. The housing includes mounting threads for the filter, sealing gasket surface, and connections for fuel inlet, outlet, and optional return lines. Fits FM516, FM517, and FN517 truck models powered by the 6D16 engine. Common failures include cracked housing from overtightened filters, stripped filter threads, leaking primer pump seals, and corroded fuel passages. Replacement restores proper fuel flow and priming function.

Primer Pump Operation: The integral primer pump is a plunger-style device on the filter head. To prime after filter replacement, loosen the air bleed screw on the filter head. Pump the primer plunger up and down until fuel without air bubbles exits the bleed screw. Tighten the bleed screw. Pump several additional strokes to pressurize the system. The plunger will become firm when primed.

Filter Installation: Apply a thin film of clean diesel fuel to the rubber gasket of the new filter. Spin the filter onto the filter head until the gasket contacts the sealing surface. Tighten an additional three-quarters turn by hand only. Never use a filter wrench for installation. Overtightening cracks the aluminum filter head.

Port Identification: The fuel inlet port receives fuel from the lift pump or fuel tank. The outlet port sends filtered fuel to the injection pump. Some versions include a third port for excess fuel return to the tank. Mark all hoses before disconnecting. Crossed hoses prevent engine starting.

Housing Inspection Before Installation: Examine the sealing surface where the filter gasket contacts. This surface must be smooth and free of scratches, nicks, or corrosion. A damaged sealing surface causes fuel leaks even with a new filter. Replace the filter head if the sealing surface is compromised.

Q1: What is the difference between a fuel filter head and a fuel filter?
A1: The filter head is the permanent aluminum housing that bolts to the engine. The filter is the disposable spin-on canister that screws onto the head. ME035672 is the head, not the filter.

Q2: Does this filter head include the primer pump?
A2: Yes. The integral manual primer pump is part of the ME035672 filter head assembly. Rebuild kits for the primer pump are available separately if only the pump seals have failed.

Q3: Will ME035672 fit my Fuso with 6D16 engine in a different chassis?
A3: This filter head is specifically listed for FM516, FM517, and FN517 chassis. Other chassis with 6D16 engines may use a different filter head with different port angles. Compare your original part number.

Q4: Why does fuel leak from the primer pump plunger?
A4: The plunger shaft seal has failed. Small leaks allow air entry into the fuel system, causing hard starting. Replace the primer pump seal kit or replace the entire filter head if the seal kit is unavailable.

Q5: Can I install a fuel heater on this filter head?
A5: No. The ME035672 filter head does not have mounting provisions for a fuel heater. Some Fuso models use a separate inline fuel heater upstream of the filter head.

Q6: What causes the filter head to crack?
A6: Overtightening the spin-on fuel filter is the primary cause. Hand-tighten only. Using a filter wrench for installation applies excessive torque to the aluminum threads. Vibration and age embrittlement also contribute to cracking.

Q7: How do I remove a stuck fuel filter without damaging the head?
A7: Use a strap wrench around the filter body. Apply steady force, not sudden冲击. If the filter will not move, drive a screwdriver through the filter body near the bottom for leverage. Never use a pipe wrench on the filter head itself.

Q8: What thread size is on ME035672 for the fuel filter?
A8: Two common thread sizes exist for Fuso filters: M16 x 1.5 and M20 x 1.5. Check your original filter before ordering. The wrong thread filter will not seal or may cross-thread the aluminum head.

Q9: Can I bypass the filter head if it is cracked?
A9: No. Bypassing the filter head allows unfiltered fuel to reach the injection pump. Dirt particles seize the pump plungers within hours of operation. Replace the cracked head immediately.

Q10: Do I need a new gasket between the filter head and mounting bracket?
A10: Inspect the existing gasket or O-ring at the mounting interface. If damaged or missing, replace it. No gasket is required if the head mounts directly to a machined surface using a paper gasket. Use the correct gasket for your specific chassis.