Oil Thermostat (English)
Масляный термостат (Russian)
Termostato de aceite (Spanish)
The genuine Shacman OEM 1002279699 Oil Thermostat is a precision thermal control component for the Shacman X5000 heavy‑duty truck engine.
Part number 1002279699 regulates engine oil temperature by directing oil flow through the oil cooler or bypassing it.
This ensures that the oil reaches optimal operating temperature quickly and maintains it under all load conditions.
Manufactured from high‑grade brass, stainless steel, and a wax‑filled thermal element, this oil thermostat is a direct replacement for the original factory unit.
It is essential for any WP12/WP13 engine rebuild or cooling system service, preventing oil from overcooling or overheating.
For Shacman X5000 fleet operators, engine rebuilders, and workshop technicians, using the genuine OEM thermostat guarantees correct opening temperature, precise flow control, and long‑term durability.
A faulty oil thermostat can cause oil to remain cold (increasing viscosity and wear) or bypass the cooler (leading to overheating and oil breakdown).
Every Shacman oil thermostat is 100% thermally tested, leak‑checked, and inspected for smooth plunger movement.
Trust OEM 1002279699 for reliable oil temperature management and extended engine life.
| Parameter | Specification |
|---|---|
| OEM Part Number | 1002279699 |
| Product Name | Oil Thermostat / Oil Cooler Bypass Valve |
| Brand / Engine | Shacman X5000 (WP12 / WP13) |
| Opening Temperature (start) | 85°C ± 2°C |
| Fully Open Temperature | 95°C ± 2°C |
| Housing Material | Brass / High‑temperature engineered polymer |
| Thermal Element Type | Wax pellet (self‑energizing, failsafe) |
| Max Oil Pressure | 10 bar |
| Port Thread (inlet/outlet) | M22 × 1.5 / M18 × 1.5 |
| Sealing Gasket Material | FKM (Viton®) / NBR (as per OE) |
| Temperature Range | -40°C to +150°C |
| Hysteresis (opening/closing) | ≤ 5°C |
| Weight (approx.) | 0.18 kg |
The oil thermostat is a temperature‑controlled bypass valve that directs engine oil through the oil cooler only when necessary.
When oil is cold (below ~85°C), the thermostat directs oil to bypass the cooler, allowing it to warm up quickly.
This reduces internal friction and wear, especially during cold starts and warm‑up.
Once the oil reaches the calibrated opening temperature, the wax pellet expands and pushes the piston to open the cooler circuit.
Oil then flows through the cooler, maintaining a stable operating temperature between 90°C and 100°C.
A stuck‑open thermostat will overcool the oil, increasing viscosity and fuel consumption.
A stuck‑closed thermostat will prevent oil from reaching the cooler, causing overheating and rapid oil degradation.
The genuine Shacman 1002279699 thermostat ensures precise thermal regulation, extending oil life and protecting bearings, turbochargers, and camshafts.
The 1002279699 oil thermostat is built with a brass or high‑temperature polymer housing.
Brass provides excellent corrosion resistance and thermal conductivity.
The internal wax pellet is a high‑precision thermal element that expands uniformly over thousands of cycles.
The piston and spring are made from stainless steel, resistant to oil additives and fatigue.
The sealing O‑rings are made from FKM (Viton®) for compatibility with all engine oils and high temperatures.
Aftermarket thermostats often use low‑grade wax or weak springs that cause erratic opening or sticking.
Genuine Shacman thermostats are calibrated to open and close at the exact temperatures specified by the engine design.
This ensures that the oil cooler circuit engages only when needed, balancing warm‑up speed and cooling capacity.
The housing is also designed to minimize pressure drop, maintaining full oil flow even when the thermostat is partially open.
Shacman’s oil thermostats are assembled in clean environments with automated calibration rigs.
Each thermostat is 100% thermally tested: it is immersed in a controlled oil bath, and the opening temperature is recorded.
The start‑to‑open temperature must be between 83°C and 87°C, and fully open between 93°C and 97°C.
Hysteresis (difference between opening and closing) is measured and must not exceed 5°C.
After thermal testing, each unit is pressure‑tested at 10 bar for external and internal leakage.
Random samples are subjected to cycle testing: 50,000 full open/close cycles at 120°C oil temperature.
After cycling, the opening temperature and flow characteristics must remain within original specifications.
Salt spray testing per ASTM B117 is performed for 240 hours on the housing; no red rust is permitted.
Only thermostats that pass all tests receive the Shacman OEM approval and the part number 1002279699.
The unit is then sealed in a protective bag with a desiccant to prevent corrosion during storage.
Shacman installs sample oil thermostats on X5000 test trucks operating in extreme heat and cold.
After 1.5 million kilometers, the thermostats are removed and tested.
Opening temperatures remain within 1°C of original calibration, and the wax element shows no degradation.
No sticking or leakage is observed. This validation confirms a service life exceeding 1.5 million kilometers.
Replacing the 1002279699 oil thermostat is a standard procedure during an engine overhaul or cooling system service.
Drain the engine oil and remove the oil filter housing or cooler assembly to access the thermostat.
Remove the old thermostat and clean the sealing surfaces thoroughly.
Install a new O‑ring (supplied separately) and lubricate it with clean engine oil.
Insert the new thermostat in the correct orientation (the spring side usually faces the cooler).
Reassemble the housing, torque bolts to specification (typically 20 Nm), and refill with oil.
Start the engine and check for leaks; also verify that the oil temperature stabilises within the normal range.
Do not reuse an old thermostat – its wax pellet may have taken a permanent set.
This thermostat is compatible with all Shacman X5000 models equipped with WP12/WP13 engines.
Always verify the OEM number 1002279699 before ordering. The thermostat is supplied without gaskets or O‑rings; these must be ordered separately.
During oil changes, monitor the oil temperature gauge on the dashboard.
If the oil takes too long to warm up (stays below 80°C in normal driving), suspect a thermostat stuck open.
If the oil runs consistently hot (above 110°C) even when the engine is not heavily loaded, suspect a thermostat stuck closed.
When replacing the oil cooler or filter head, always replace the thermostat as a preventive measure.
Inspect the old thermostat by heating it in a pot of oil with a thermometer; it should start opening at ~85°C and be fully open at ~95°C.
If it fails this test, replace it with a genuine 1002279699 unit.
Keep a spare thermostat in your parts inventory – it is a low‑cost item that can prevent major engine damage from overheating or excessive cold‑oil wear.
Proper oil temperature regulation is critical for engine longevity.
Cold oil does not flow well, causing delayed lubrication to bearings and turbochargers during start‑up.
Extended operation with cold oil also leads to sludge formation and increased fuel dilution.
Hot oil (above 120°C) oxidizes rapidly, losing its viscosity and forming varnish deposits on pistons and bearings.
The genuine Shacman oil thermostat keeps oil in the optimal window of 85–100°C, balancing flow, film strength, and chemical stability.
This extends oil change intervals by up to 20% and reduces wear on moving parts.
In turbocharged engines, the thermostat also ensures that oil returning from the turbocharger is cooled before re‑entering the sump, preventing coking.
Fleet data shows that using genuine oil thermostats reduces oil‑related failures by over 90% and extends turbocharger life by 30%.
The thermostat is a low‑cost component that delivers massive protection.
Aftermarket oil thermostats often use wax of unknown quality, leading to inaccurate opening temperatures.
They may have weak springs that allow premature bypass or hysteresis causing hunting.
The housings may be made of low‑grade brass or plastic that cracks under thermal cycling.
Genuine Shacman thermostats are manufactured to precise OE specifications, with verified wax formulation and spring rates.
The housing materials are selected for long‑term durability under the WP12/WP13 engine’s operating conditions.
Genuine thermostats also include the correct thread sizes and seal grooves; aftermarket parts often require adapters or cause leaks.
Using OEM parts maintains your engine warranty and ensures that the oil cooling system operates as designed.
For fleets, this reduces the risk of oil overheating or overcooling, preventing costly engine damage.
The genuine thermostat is a small investment that protects a much larger asset.
The cost of a genuine oil thermostat is modest (typically $25–45).
The cost of an engine failure due to oil overheating can exceed $20,000.
For a fleet of 50 X5000 trucks, using genuine 1002279699 thermostats during overhauls reduces oil‑temperature‑related failures by over 90%.
Aftermarket thermostats may need replacement every 200,000 km due to drift or sticking.
Genuine Shacman thermostats last the life of the engine (1.5 million km+), providing the lowest total cost of ownership.
The improved oil temperature control also reduces fuel consumption (by maintaining optimal viscosity) and extends oil drain intervals, saving money on lubricants.
A properly working thermostat also reduces the load on the oil cooler, extending its service life.
Authorized Shacman parts distributors stock the 1002279699 oil thermostat worldwide.
Each thermostat is supplied in a sealed poly bag with the OEM number and batch code for traceability.
Bulk packs of 10, 25, or 50 units are available for large fleet maintenance depots.
Just‑in‑time delivery options help minimize inventory while ensuring critical components are available for scheduled oil cooler services.
Always purchase from approved dealers to avoid counterfeit products.
Genuine Shacman thermostats can be verified by the smooth brass or polymer finish, the laser‑etched part number, and the presence of a calibrated wax pellet with spring.
The thermostat also has a distinct “snap” when the piston moves – counterfeit parts often feel mushy or have no resistance.
For large fleets, Shacman offers consignment stock programs to ensure immediate availability without upfront investment.
Contact your regional distributor for details.
The Shacman OEM 1002279699 Oil Thermostat is a small but critical component that ensures your X5000 engine oil stays at the optimal temperature for lubrication and protection.
By providing precise wax‑pellet calibration, durable construction, and reliable operation, this genuine part prevents cold‑start wear and oil overheating.
For Shacman X5000 heavy‑duty trucks, choosing the original 1002279699 oil thermostat is a simple, cost‑effective decision that delivers long‑term engine protection and operational efficiency.
Trust only genuine Shacman – the thermostat that keeps your oil at the perfect temperature.
