Our 5-12563001-6 valve seats solve the B2B pain point of engine compression loss in 4JB1 engines. Built for NKR trucks and excavators, these high-hardness alloy seats prevent valve recession and surface pitting, ensuring stable power output during grueling daily operations and high-load cycles.
Item NO.:
5-12563001-6Order(MOQ):
1Payment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANLead Time：
2-3 DAYS
For wholesalers and agents, the 512563-0016 offers an OEM-standard solution with superior thermal conductivity. Its precision fit prevents seat loosening, strengthening your reputation for providing elite Isuzu parts that minimize fleet maintenance costs and maximize equipment service life.
Product Features
Hardened Chromium-Alloy Steel Forged from premium heat-resistant alloys to prevent surface deformation and impact wear under the rapid combustion cycles of the 4JB1 engine.
Superior Thermal Conductivity The 512563-0016 facilitates rapid heat transfer from the valve to the cooling jacket, preventing valve stem warping and extending valvetrain life.
Micron-Precision CNC Machining Features ultra-precise dimensional accuracy to ensure a 100% airtight seal with the valve face, immediately restoring original engine compression.
Stable Interference Fit Machined to strict tolerances to ensure the seat remains securely seated in the head during extreme thermal expansion and contraction cycles.
Direct OEM Interchangeability Manufactured to exact 1:1 original specifications for Isuzu 4JB1 engines, guaranteeing a seamless fit and immediate restoration of performance.
Product Specification
| Product Name | Engine Valve Seat Insert |
| OEM Part Number | 5-12563001-6 / 512563-0016 / 5125630016 |
| Engine Model | Isuzu 4JB1 / 4JB1-T / 4JG1 / 4JA1 |
| Application | Isuzu NPR / NKR Truck, ELF Series, Excavators, Forklifts |
| Material | High-Strength Chromium-Molybdenum Steel Alloy |
| Installation Type | Direct Replacement (Standard OEM Size) |
| Thickness | Standard OEM Specification |
| Color | Silver Metallic / Natural Steel |
| Working Temperature | -60°C to 750°C (High-heat combustion resilience) |
| Key Function | Provides a hardened, heat-resistant sealing surface for intake and exhaust valves. |
| Condition | 100% New, Aftermarket / OEM Quality |
| Packaging | Neutral Packing / Customized Box |
Why Choose Us
1.We have profession isuzu team,more than 20 years experience business isuzu parts.
2. We can offer used and new isuzu genuine parts, oem,good quality made in china parts to you.
3. The isuzu genuine parts will give weight,price when quotation.
4.Isuzu genuine stock pictures will send before order.
5.All isuzu parts can check with part number,all parts can order follow part number.
6. Quick delivery time,in 24 hours if sotck.
7. Safe packing to protect the goods, such as wooden box, Iron sheet for our isuzu parts.
8. Small quantity can accept.Sample order also accept.
9. 24 hours oversea service.
10.Lifelong after-sales service.
Certificate
What's the shipping way you can offer?
1) Big order: By sea or by air.(It can reduce the costs)
2) Small order: DHL, TNT, UPS, FEDEX, EMS,ARAMEX
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