Model: WP6
Part Number: 13028584
Brands: Weichai Power
Engine Model: WP6, WP6G, WP6H
Engine Type: Diesel
Scope of application: light and medium trucks, buses, agricultural machinery, generator sets
On the WP6 the cylinder head closes the combustion chamber, carries the valve train and routes coolant around the injector and valve bridges. Part 13028584 is the head used across the mid-range Weichai family, the engine found in light and medium trucks, buses, agricultural equipment and small generator sets.
The head is where heat and pressure meet. Combustion pressure pushes down on the deck while the casting is heated unevenly, and the gasket has to hold the seal while the metal expands and contracts. A head that has warped or cracked will pass coolant into the cylinder or compression into the water jacket, and no amount of injector tuning will fix it.
The 13028584 casting fits WP6, WP6G and WP6H engines. Typical installations are medium trucks, city buses, tractors and other agricultural machinery, and small generator sets in the 40 to 120 kVA range. Confirm the engine plate and the old head casting number: injector bore depth and port shape changed between production batches, and fitting the wrong variant causes hard starting and coolant leaks.
Each head starts as an iron casting and is then stress relieved and machined. The checks that decide whether it will last are all dimensional:
Heads are supplied with valves and springs unless a bare head is requested. Machined faces are oiled and the unit is packed in a foam-lined carton suitable for sea freight.
Head failures on the WP6 usually begin with cooling. A restricted radiator or a tired water pump raises metal temperature, the deck warps and the gasket loses its grip. The first symptoms are subtle and easy to misdiagnose:
A cooling system pressure test and a combustion gas test in the coolant confirm the diagnosis in minutes and save stripping a healthy head.
Preparation decides the outcome. Clean the block deck to bare metal, check flatness with a straight edge and a feeler gauge, and confirm that the head bolts are new.
Reusing torque-to-yield bolts is the most common cause of a repeat gasket failure. The bolts stretch once and do not recover.
Match the engine plate, the old casting number and the injector type. On engines that have already been rebuilt, the head may be from a later production run with a different injector seat. Send photographs of the old head and the engine nameplate and our team will confirm the variant before the consignment ships.
Minor valve seat wear can be re-cut, and a lightly warped deck can be machined once if enough material remains. Cracks between valve seats, at the injector bore or across the deck are not economically repairable. A repaired head that cracks again usually takes the gasket and sometimes the liners with it.
Keep the coolant concentration correct, replace the water pump and thermostat on schedule and clean the radiator externally in dusty conditions. Agricultural engines often run with clogged radiators because the core is never washed out; that single habit is responsible for many head failures. Check the aftercooler for restrictions as well, since a hot intake raises thermal load on the head.
Heads are fixed to a timber skid with the deck covered and the valve train protected, then banded so nothing moves in transit. If the head is consolidated with a block in one container, tell us so heavy items can be loaded first. Stock heads usually leave our warehouse within three to five working days, with sea freight taking twenty-five to forty days depending on the port.
Yes, complete with valves and springs unless you ask for a bare head.
No. They are torque-to-yield and must be replaced every time the head is removed.
No. WP6 and WP7 heads are different castings and are not interchangeable.
A pressure test and a combustion gas test on the coolant will confirm it before the engine is stripped.
Browse the Weichai cylinder head category, and complete the top end with the WP6 engine overhaul kit 13032095 or the WP6 cylinder liner 13056682.
We offer OEM quality and excellent after-sales service as a complementary option. Engine brands supported include Weichai, Baudouin, Yuchai, Caterpillar, FAW Xichai, Sinotruk, Cummins and other engine parts. Specifically engine overhaul kits, pistons, cylinder liners, crankshafts, camshafts, fuel pumps, water pumps, lube pumps, injectors, and other performance parts.
If you are not sure about the part number that you need, please provide all the information you have, such as the equipment nameplate, engine nameplate or engine number, or real photos.
On the WP6 the cylinder head closes the combustion chamber, carries the valve train and routes coolant around the injector and valve bridges. Part 13028584 is the head used across the mid-range Weichai family, the engine found in light and medium trucks, buses, agricultural equipment and small generator sets.
The head is where heat and pressure meet. Combustion pressure pushes down on the deck while the casting is heated unevenly, and the gasket has to hold the seal while the metal expands and contracts. A head that has warped or cracked will pass coolant into the cylinder or compression into the water jacket, and no amount of injector tuning will fix it.
The 13028584 casting fits WP6, WP6G and WP6H engines. Typical installations are medium trucks, city buses, tractors and other agricultural machinery, and small generator sets in the 40 to 120 kVA range. Confirm the engine plate and the old head casting number: injector bore depth and port shape changed between production batches, and fitting the wrong variant causes hard starting and coolant leaks.
| We Are 30 Years Diesel Engine Parts Supplier | |
| Brand | EPID |
| Warranty | 12 Months |
| Condition | 100%New |
| More Models | Weichai: WP6, WP6G, WP6H, and other Weichai series. |
| Shipping | By sea / air / express (DHL, FEDEX, TNT, UPS, EMS) |
| Packing | Standard exporting packing or as required |
| Payment Term | L/C, T/T, Western Union, Trade Assurance |
| Delivery Time | 3-7 days (depend on order) |
| Selling Point | 1. On-time Delivery 2. Genuine Quality Assurance 3. Professional Supplier |
Each head starts as an iron casting and is then stress relieved and machined. The checks that decide whether it will last are all dimensional:
Heads are supplied with valves and springs unless a bare head is requested. Machined faces are oiled and the unit is packed in a foam-lined carton suitable for sea freight.
Head failures on the WP6 usually begin with cooling. A restricted radiator or a tired water pump raises metal temperature, the deck warps and the gasket loses its grip. The first symptoms are subtle and easy to misdiagnose:
A cooling system pressure test and a combustion gas test in the coolant confirm the diagnosis in minutes and save stripping a healthy head.
Preparation decides the outcome. Clean the block deck to bare metal, check flatness with a straight edge and a feeler gauge, and confirm that the head bolts are new.
Reusing torque-to-yield bolts is the most common cause of a repeat gasket failure. The bolts stretch once and do not recover.
Match the engine plate, the old casting number and the injector type. On engines that have already been rebuilt, the head may be from a later production run with a different injector seat. Send photographs of the old head and the engine nameplate and our team will confirm the variant before the consignment ships.
Minor valve seat wear can be re-cut, and a lightly warped deck can be machined once if enough material remains. Cracks between valve seats, at the injector bore or across the deck are not economically repairable. A repaired head that cracks again usually takes the gasket and sometimes the liners with it.
Keep the coolant concentration correct, replace the water pump and thermostat on schedule and clean the radiator externally in dusty conditions. Agricultural engines often run with clogged radiators because the core is never washed out; that single habit is responsible for many head failures. Check the aftercooler for restrictions as well, since a hot intake raises thermal load on the head.
Heads are fixed to a timber skid with the deck covered and the valve train protected, then banded so nothing moves in transit. If the head is consolidated with a block in one container, tell us so heavy items can be loaded first. Stock heads usually leave our warehouse within three to five working days, with sea freight taking twenty-five to forty days depending on the port.
Browse the Weichai cylinder head category, and complete the top end with the WP6 engine overhaul kit 13032095 or the WP6 cylinder liner 13056682.
Yes, complete with valves and springs unless you ask for a bare head.
No. They are torque-to-yield and must be replaced every time the head is removed.
No. WP6 and WP7 heads are different castings and are not interchangeable.
A pressure test and a combustion gas test on the coolant will confirm it before the engine is stripped.
EPID supplies diesel engine parts for Weichai, Baudouin, Yuchai, Caterpillar, Sinotruk, FAW Xichai and Cummins engines. Every order is checked against the original part number before packing, and our team can identify a part from a photo of the engine plate. Ask for a quotation with your model and quantity and we will reply within one working day.
