The part is a critical component that integrates the oil filter, oil cooler, and bypass valves into a single housing for the HOWO MAX 4X2 MC13 engine. This part ensures proper oil cleanliness and temperature regulation, extending engine life. When you choose authentic Howo Parts, This part guarantees OE fitment and reliable performance. Below are detailed descriptions of the two variants included in This part kit.
The part (E265) is the standard version for SINOTRUK MC11 and MC13 engines rated up to 500 hp. This part features a cast aluminum housing with an integral full flow filter element and a plate type oil cooler with 12 cooling plates. The bypass valve opens at 2.5 bar differential pressure to ensure oil flow even if the filter becomes clogged. This part has mounting points for the oil pressure sensor and oil temperature sensor.
It is designed for engines with a standard oil cooler capacity, maintaining oil temperature within 10°C of coolant temperature under normal loads. The E265 Engine oil module is identified by a laser etched marking on the housing. It requires a specific gasket set (sold separately). The filter element is a spin on type with a M26x1.5 thread.
This part is suitable for most HOWO MAX 4X2 on highway applications where oil cooling demands are moderate. It has a maximum oil flow rate of 180 L/min and can handle oil temperatures up to 140°C. The housing is pressure tested at 8 bar to ensure integrity. When replacing an Engine oil module, always verify the original part number to select the correct variant.
The part (E381) is the heavy duty version for higher output MC13 engines rated 510 hp and above, as well as for severe duty vocational applications. This part features an upgraded oil cooler with 18 cooling plates, providing approximately 40% greater heat rejection than the E265 unit. The bypass valve is set at 3.0 bar to accommodate higher flow rates.
This part includes an integrated oil thermostat that routes oil through the cooler only after reaching 85°C, improving warm up time and reducing engine wear. The housing is reinforced with additional ribs to withstand higher vibration levels found in off road and construction trucks. This part also has a larger filter element with increased dirt holding capacity (60 grams vs 40 grams on the E265).
It is marked with E381 casting number. This part is recommended for vehicles operating in hot climates, those towing heavy loads, or those with auxiliary hydraulic systems that add extra thermal load. The maximum oil flow rate is 210 L/min, and it can sustain oil temperatures up to 150°C. Both Engine oil module variants share the same mounting bolt pattern and gasket interface, making them interchangeable on the same engine block. However, the longer cooler core of the E381 requires additional clearance; always check for interference with the chassis before swapping. Choosing the correct Engine oil module ensures optimal oil cooling capacity and filter life for your specific operating conditions.
Engine oil module – genuine HOWO integrated oil filter and cooler assembly for MAX 4X2 MC13
This part combines the full flow filter and plate type oil cooler into one housing, reducing potential leak points and simplifying maintenance. The part design eliminates external hoses and connections, improving reliability.
Choose The part that matches your engine power and duty cycle. The E265 Engine oil module suits standard on highway operations, while the E381 Engine oil module provides extra cooling for high horsepower MC13 engines and severe duty applications.
The part includes a precision set bypass valve that opens if the filter element becomes clogged, ensuring continuous oil supply to the engine. This part feature protects the bearings from oil starvation even if filter maintenance is overdue.
Both Engine oil module variants are manufactured to SINOTRUK’s exact specifications, with the same mounting bolt pattern, gasket interface, and filter thread as the original parts. Your Engine oil module will bolt on without modifications.
The engine oil pump draws oil from the sump and forces it into The part. Inside the module, oil first passes through the full flow filter element, where solid contaminants are trapped. The oil then flows through the plate type cooler core, which transfers heat to the engine coolant flowing in the opposite direction. The cooled and filtered oil exits The part and returns to the main oil gallery to lubricate the crankshaft bearings, camshaft,
rocker arms, and turbocharger. The integrated bypass valve ensures that if the filter becomes clogged, oil can still flow to the engine, albeit unfiltered, to prevent oil starvation. The part also contains a drain back valve to prevent oil from draining out of the filter when the engine is off, ensuring rapid oil pressure build up on startup. A properly functioning Engine oil module maintains oil pressure between 3.5 and 5.5 bar at rated speed,
and oil temperature typically below 120°C even under full load. When an Engine oil module fails due to a cracked housing or leaking cooler core, the engine may suffer low oil pressure, overheating, or contamination. Replacing a worn Engine oil module with a genuine unit restores original lubrication performance.
Before installing The part, drain the engine oil and remove the old module. Clean the engine block mounting surface thoroughly. Install a new gasket (sold separately) onto The part flange. Position the module over the studs or bolt holes. Insert the mounting bolts and torque them to 50 Nm in a cross pattern. Do not reuse old bolts;
use new grade 10.9 fasteners. Install a new spin on filter element onto The part, tightening by hand 3/4 turn after the gasket contacts the sealing surface. Refill the engine with the correct oil grade and quantity. Start the engine and check for oil leaks around The part flange and filter. Allow the engine to reach operating temperature and verify that the oil pressure gauge reads within specification. If The part is being upgraded from E265 to E381, ensure there is adequate chassis clearance for the longer cooler core.
If oil leaks from The part flange, the gasket may be damaged or the bolts undertorqued. Retorque to 50 Nm. If the leak persists, replace the gasket. Oil weeping from the filter element seal indicates an incorrectly tightened filter or a damaged seal. Replace the filter element. Low oil pressure after Engine oil module replacement could be caused by a missing bypass valve or an incorrect filter.
Ensure the filter element is genuine and that the bypass valve is present and moves freely. If coolant appears in the oil (milky emulsion) or oil appears in the coolant, The part cooler core has failed internally; replace the entire Engine oil module. A rattling noise from The part may indicate a loose internal component; replace the module immediately.
The part itself does not have a replacement interval, but the spin on filter element should be changed every 40,000 km or at every oil change. The gasket between The part and the engine block should be replaced whenever the module is removed. Inspect The part housing for cracks or corrosion during every major service (200,000 km).
If the engine has overheated, the internal cooler core may have sustained damage; consider replacing The part as a precaution. The bypass valve should be checked for free movement if the module is disassembled (though disassembly is not recommended). Always use a genuine Engine oil module for replacement to ensure correct cooler capacity and bypass valve calibration.
The E265 Engine oil module is compatible with SINOTRUK MC11 and MC13 engines up to 500 hp in HOWO MAX 4X2, SITRAK C7H, and HOWO T7H trucks. The E381 Engine oil module is required for MC13 engines rated 510 hp and above, as well as for all MC13 engines used in vocational applications (dump trucks, mixers, heavy haulage).
Both Engine oil modules are backward compatible on the same engine block; upgrading from E265 to E381 is possible if the chassis allows the extra cooler length. These Engine oil module variants are not compatible with older WD615 or D10 engine series. Always verify your engine serial number and horsepower rating before selecting an Engine oil module.
Aftermarket Engine oil modules are often made from lower grade cast aluminum that can crack under thermal cycling, leading to sudden oil loss. The cooler cores in copy modules may have fewer plates or poor brazing, resulting in inadequate cooling and oil overheating.
The bypass valve calibration in non genuine modules may be incorrect, causing either premature opening (bypassing filtration) or failure to open (filter starvation). Genuine HOWO Engine oil module components are manufactured to SINOTRUK’s exact specifications, using certified A380 aluminum alloy, vacuum brazed cooler cores, and precision calibrated bypass valves. The small additional cost of a genuine Engine oil module is insignificant compared to the cost of an engine rebuild caused by oil starvation or overheating.
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