The part is the heart of the cooling system on the HOWO MAX 4X2 MC13 engine, circulating engine coolant to maintain optimal operating temperatures. This comprehensive Water pump kit includes the pump assembly, front cover plate, water pump pulley, crankshaft front oil seal, distribution housing, and all necessary gaskets, bolts, screw plugs, and sealing washers. When you choose authentic Howo Parts, This part kit guarantees OE fitment, leak free sealing, and long term reliability. Below are detailed descriptions of every component included with This part assembly.
Three M12x40 flange bolts with property class 10.9 and length 40mm secure The part to the engine block or front cover assembly. These Water pump bolts are manufactured from medium carbon alloy steel with a zinc nickel coating for corrosion resistance. The 12mm diameter provides the high clamping force necessary to compress The part gasket and prevent coolant leakage. The 10.9 grade offers a tensile strength of 1,040 MPa and yield strength of 940 MPa. The integral flange distributes load evenly, eliminating the need for separate washers. Torque these Water pump bolts to 50 Nm in a crossing pattern.
The front cover plate assembly is a cast aluminum or steel housing that mounts The part and encloses the front of the engine. This component is precision cast and stress relieved after machining to maintain flatness and prevent distortion. The part housing includes integrated mounting surfaces for The part pulley and provides access to the crankshaft front oil seal. It also serves as a structural member in the front drive system, supporting the fan bracket and serpentine belt tensioner.
The crankshaft front oil seal (material encoding 201V01510-0282) is a spring loaded radial lip seal that prevents engine oil from leaking past the front of the crankshaft. This part related seal is made from FPM rubber with a stainless steel garter spring, capable of withstanding oil temperatures up to 150°C and shaft speeds up to 4,000 RPM. The seal is pressed into the front cover plate assembly. Lubricate the seal lip with clean engine oil before installation and use a seal driver to ensure it is seated squarely.
The front end cover sealing gasket is a flat fiber reinforced sheet that seals the interface between the front cover plate assembly and the engine block. This part gasket is pre cut to the exact contour of the cover plate flange and includes bolt holes at all mounting points. The gasket material is resistant to engine oil and coolant, maintaining its sealing properties even after thousands of thermal cycles.
Fourteen M8x25 flange bolts (with one additional supplied for a total of 14) are used throughout The part and front cover assembly. The part bolts have a property class of 10.9, a thread size of M8x1.25, and a length of 25mm. They are used to secure the front cover plate, water pump pulley, distribution housing, and various brackets. The integral flange distributes clamping load evenly. Torque these Water pump bolts to 25 Nm.
Eight M8x40 flange bolts (supplied as 6 + 2) are used where The part components require extra length for thicker flanges or spacer bushings. These Water pump bolts have the same 10.9 grade and thread locking patch as the M8x25 variant but with a 40mm length. The flange head eliminates the need for washers and provides a consistent bearing surface. Torque these Water pump bolts to 25 Nm.
The part pulley (material encoding 201V06503-0384) is a stamped steel or cast iron wheel driven by the serpentine belt. This part pulley has precision machined grooves that match the belt profile and a central pilot bore that centers on the pump shaft. The pulley is bolted directly to The part hub using three bolts, and its diameter is carefully selected to drive the pump at the correct speed. A damaged or out of balance Water pump pulley can cause belt noise and premature bearing wear.
Three M8x12 flange bolts with property class 8.8 are used to secure The part pulley to The part hub. The 12mm length is ideal for the thin pulley flange, preventing the bolts from bottoming out. Torque these Water pump pulley bolts to 15 Nm. Unlike grade 10.9 bolts, these 8.8 fasteners provide adequate strength for accessory mounting while reducing the risk of over tightening into an aluminum hub.
The sealing gasket of water pump is a precision cut fiber or rubber sheet that seals the interface between The part and the front cover plate. This part gasket is made from aramid fiber material with a nitrile rubber binder, providing excellent resistance to coolant and heat. The gasket is pre cut with all bolt holes and must be replaced every time The part is removed.
Three M8x130 flange bolts are used to secure The part or front cover plate through deep bosses in the engine block. The 130mm length allows these Water pump bolts to pass through the entire front cover assembly and into the cylinder block threads. Torque these long Water pump bolts to 25 Nm. A drop of thread sealant is recommended due to the open bore length.
The distribution housing (material encoding 200V06330-5041) is a cast aluminum component that routes coolant to the heater core and from The part to the cylinder block. This part related housing mounts directly to the engine block near The part outlet. It includes integrated ports for temperature sensors and coolant hoses, as well as mounting points for the fan control module.
The distribution housing sealing gasket (material encoding 201V06903-0061) is a flat fiber sheet that seals the distribution housing to the engine block. This part gasket is pre cut to match the complex port geometry of the housing, including separate passages for coolant circulation and heater core supply. Replace the distribution housing sealing gasket whenever the housing is removed.
Seven M8x100 flange bolts (material encoding MQ6-03216-8317) are used to secure the distribution housing and Water pump brackets to the engine block. These Water pump bolts have a thread length of 100mm, making them suitable for applications where the mounting boss is deep within the casting. Torque these Water pump bolts to 25 Nm. The pre applied thread locking patch (MAN183) prevents loosening under engine vibration.
The M14x1.5 screw plug (material encoding MQ6-08049-0031) is a zinc plated steel plug that seals an oil gallery or coolant passage. This part related component has a hexagon socket drive and a conical sealing seat. Apply thread sealant to the plug before installation and torque to 35 Nm. The included composite sealing washer provides additional leak protection.
This composite sealing washer has an inner diameter of 14.7mm and outer diameter of 22.0mm, made from a steel outer ring bonded with an FPM1 rubber sealing element. This part washer is used under the screw plug to seal against engine coolant or oil. Replace This part washer every time the screw plug is removed.
This screw plug (material encoding MQ6-08049-0032) is an additional plug used to seal auxiliary ports on The part assembly or distribution housing. It is made from zinc plated steel with a hexagon socket drive. Torque this plug to 25 Nm when used in coolant passages.
This larger composite sealing washer has an inner diameter of 16.7mm and outer diameter of 24.0mm, with the same steel to FPM1 construction. It is used under larger screw plugs on The part or engine block. Replace This part washer when servicing the associated plug.
Water pump – genuine HOWO water pump and front housing kit for MAX 4X2 MC13
This part kit includes the pump pulley, front cover plate, crankshaft front oil seal, distribution housing, all gaskets, and every grade 10.9 bolt, screw plug, and composite sealing washer. No extra hardware is needed for a full front engine and water pump service on the MC13 engine.
Every Water pump bolt is property class 10.9 with MAN183 thread locking patches, except the pulley bolts which are grade 8.8 to prevent hub damage. The 10.9 grade provides a tensile strength of 1,040 MPa, ensuring secure, leak proof Water pump mounting.
This part kit includes the crankshaft front oil seal (FPM), front cover gasket, water pump gasket, distribution housing gasket, and two composite FPM sealing washers. All seals are rated for high temperature coolant and oil exposure.
This part and front housing kit is manufactured to SINOTRUK’s exact specifications for the 13 liter MC13 engine. Every Water pump bolt hole, gasket contour, and seal diameter matches the original casting.
The part is driven by the crankshaft via the serpentine belt and water pump pulley. When the engine is running, The part impeller draws coolant from the radiator and pushes it through the engine block water jacket, where it absorbs combustion heat. The heated coolant then flows through the cylinder head, past the thermostat, and returns to the radiator for cooling.
The front cover plate assembly houses The part and provides a mounting point for the crankshaft front oil seal, which prevents oil from leaking past the front of the crankshaft. The distribution housing routes coolant from The part to the heater core and auxiliary cooling circuits. A failed Water pump will cause overheating, while a damaged crankshaft front oil seal will result in oil leakage onto the front of the engine. Replacing The part with a genuine kit ensures all sealing surfaces and fasteners are new and correctly torqued.
Before installing The part, drain the cooling system and disconnect the battery. Remove the front cover plate and old Water pump. Clean all mounting surfaces on the engine block. Install a new crankshaft front oil seal into the front cover plate using a seal driver; lubricate the lip with engine oil. Install the front cover plate with a new gasket,
torquing the M8x130 and M8x100 Water pump bolts to 25 Nm and the M12x40 Water pump bolts to 50 Nm. Install the distribution housing with its gasket, using M8x25 bolts (25 Nm). Install The part with a new gasket, torquing the M8x40 and M8x25 bolts to 25 Nm. Install The part pulley with the three M8x12 bolts (15 Nm). Install the screw plugs with new composite sealing washers (M14 plug 35 Nm, other plug 25 Nm). Refill the cooling system, start the engine, and check for leaks.
If coolant leaks from The part weep hole, the internal mechanical seal has failed. Replace The part immediately. A grinding noise from The part pulley indicates bearing wear; inspect The part and replace if there is play in the shaft.
Oil leakage from the front cover plate indicates a failed crankshaft front oil seal; remove the front cover and install a new seal. If The part gasket leaks, retorque The part bolts to 25 Nm; if the leak persists, replace the gasket. A loose water pump pulley can be caused by undertorqued M8x12 bolts; torque to 15 Nm and use thread locker.
The part itself has no fixed replacement interval but should be inspected at every coolant change (80,000 km). Check The part pulley for wobble and the weep hole for signs of coolant seepage. The crankshaft front oil seal should be replaced if any oil leakage is observed on the front of the engine. The gaskets should be replaced whenever The part or front cover is removed. The composite sealing washers should be replaced if the corresponding screw plugs are loosened. Always use a genuine Water pump kit when replacing the pump to ensure correct impeller design and seal quality.
This part kit is specifically designed for the SINOTRUK MC13 engine used in HOWO MAX 4X2 tractors, SITRAK C7H, and HOWO T7H trucks. It fits all production years from 2018 onward. The part kit is also compatible with the MC11 engine, though the number of bolts may differ slightly. This part kit is not compatible with older WD615 or D10 engine series. Always verify your engine serial number before ordering.
Aftermarket Water pumps often use lower grade bearings that fail prematurely or impellers that are not correctly balanced, leading to cavitation and reduced coolant flow. Non genuine crankshaft front oil seals may be made from NBR instead of FPM, hardening and leaking within months. The gaskets in copy Water pump kits may not have the correct thickness or material composition,
causing coolant leaks after installation. Genuine HOWO Water pump components are manufactured to SINOTRUK’s exact specifications, using certified bearings, balanced impellers, FPM seals, and high grade gaskets. The small additional cost of a genuine Water pump is insignificant compared to the cost of an engine rebuild caused by overheating or oil starvation.
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