Model: WP12 / WD618
Part Number: 612630040006
Brands: Weichai Power
Engine Model: WP12, WD12, WD618, WP12.430, WP12.460
Engine Type: Diesel
Scope of application: heavy trucks, mining dump trucks, construction machinery, marine and generator engines
The WP12 and WD618 engines have carried more than one full gasket kit number, and part 612630040006 is one of them, alongside 612600900279 and 612630040355. The differences are usually in the head gasket and in the manifold gaskets, tied to production changes in the cylinder head casting.
That is why the old gasket and the head casting number matter more than the model name when ordering. A kit that fits the bolt pattern can still be wrong at the fire ring, and the leak that follows is blamed on the gasket rather than on the specification.
This is a complete sealing set for a rebuild, not a partial collection of the most common gaskets. Every joint opened during an overhaul is covered, including the small washers that are easy to lose and impossible to improvise.
Compare the old head gasket with the new one before the engine is stripped. Fire ring position, coolant hole pattern and overall thickness are the three features that decide compatibility, and all three are visible when the two gaskets are laid side by side on a flat surface.
If any of those features differ, stop and check the head casting number before continuing. Continuing with a mismatched gasket produces a leak that no amount of retorquing will cure.
Confirm which gasket has failed before ordering. Oil at the pan rail points to the pan gasket or rear main. Coolant at the front points to the water pump. Soot around manifold joints points to manifold gaskets, while bubbles in the radiator point to the head gasket.
Preparation decides whether the gasket seals. Clean both surfaces to bare metal, check flatness, and confirm that the head bolts are new before the head goes back on.
The head gasket sees combustion pressure, coolant at temperature and returning oil at the same time, which no other gasket in the engine has to manage. When the engine overheats, the head expands unevenly and the clamping load shifts away from one area of the gasket. The leak begins as a small coolant loss and becomes a compression leak within a few hundred hours.
Reusing the pan gasket after inspecting the bearings, adding sealant to a steel head gasket and fitting manifold gaskets dry when the manual calls for a thin film are the three most common errors. Each produces a leak that appears only when the engine is hot and working.
Store the kit flat, dry and out of sunlight. Composite gaskets absorb moisture slowly, and a kit stored in a damp workshop should be inspected before fitting. Keep the head gasket in its carton rather than on a bench where it can be bent.
Kits are light and compact, which makes them ideal to consolidate with liners or pistons. Tell us what else is going into the shipment so the kit is packed on top and not crushed by a cylinder block.
Retorque manifold bolts and check pan bolts after the first week. Keep coolant at the correct mixture to prevent liner pitting and repair any oil leak immediately, because oil soaking into a composite gasket eventually softens it.
Yes. This is a full set, not a partial kit.
Compare the old head gasket and the head casting number, or send us photos.
No. It is installed dry.
No. Gaskets and copper washers are single-use.
Browse the Weichai gasket set category, and pair the kit with the WP12 full gasket kit 612600900279 or the WP12 cylinder head 612630040001.
Weichai WP12 Full Gasket Kit (612630040006). This set covers the sealing surfaces disturbed during a rebuild. Its head gasket is matched to the head casting, and the small seals it includes are the ones most often forgotten.
Compare the old head gasket with the new one for fire ring position, coolant hole pattern and thickness. A gasket from the wrong generation bolts up and leaks at the fire ring.
Numbers beginning 6126 belong to the generation shared with the WD618 and early WP12 engines. Parts in this block were revised several times, so the casting or housing is the reliable identifier rather than the number alone. On this engine, confirm the WP12 application against the engine plate before ordering.
Install the head gasket dry unless the manual says otherwise. Sealant prevents composite and MLS gaskets from seating correctly.
Ordering note. Payment terms and shipping method are confirmed in writing before dispatch, including the port of loading and the estimated transit time.
Related reading: Head Gasket Failure Symptoms and How to Choose a Replacement
| We Are 30 Years Diesel Engine Parts Supplier | |
| Brand | EPID |
| Warranty | 12 Months |
| Condition | 100%New |
| More Models | Weichai: WP12, WD12, WD618, WP12.430, WP12.460, 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 |
Compare the old head gasket with the new one before the engine is stripped. Fire ring position, coolant hole pattern and overall thickness are the three features that decide compatibility, and all three are visible when the two gaskets are laid side by side on a flat surface.
If any of those features differ, stop and check the head casting number before continuing. Continuing with a mismatched gasket produces a leak that no amount of retorquing will cure.
Confirm which gasket has failed before ordering. Oil at the pan rail points to the pan gasket or rear main. Coolant at the front points to the water pump. Soot around manifold joints points to manifold gaskets, while bubbles in the radiator point to the head gasket.
Preparation decides whether the gasket seals. Clean both surfaces to bare metal, check flatness, and confirm that the head bolts are new before the head goes back on.
The head gasket sees combustion pressure, coolant at temperature and returning oil at the same time, which no other gasket in the engine has to manage. When the engine overheats, the head expands unevenly and the clamping load shifts away from one area of the gasket. The leak begins as a small coolant loss and becomes a compression leak within a few hundred hours.
Reusing the pan gasket after inspecting the bearings, adding sealant to a steel head gasket and fitting manifold gaskets dry when the manual calls for a thin film are the three most common errors. Each produces a leak that appears only when the engine is hot and working.
Store the kit flat, dry and out of sunlight. Composite gaskets absorb moisture slowly, and a kit stored in a damp workshop should be inspected before fitting. Keep the head gasket in its carton rather than on a bench where it can be bent.
Kits are light and compact, which makes them ideal to consolidate with liners or pistons. Tell us what else is going into the shipment so the kit is packed on top and not crushed by a cylinder block.
Retorque manifold bolts and check pan bolts after the first week. Keep coolant at the correct mixture to prevent liner pitting and repair any oil leak immediately, because oil soaking into a composite gasket eventually softens it.
Browse the Weichai gasket set category, and pair the kit with the WP12 full gasket kit 612600900279 or the WP12 cylinder head 612630040001.
Yes. This is a full set, not a partial kit.
Compare the old head gasket and the head casting number, or send us photos.
No. It is installed dry.
No. Gaskets and copper washers are single-use.
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.
