OEM Standard Piston Assembly with Alfin Steel Insert and 115 mm Bore for ISUZU 6HH1 Engine with Oil Gallery Cooling
| Piston Pin Diameter: | 36 Mm | Cylinder Diameter: | 115.00 Mm |
| Overall Height: | 106.5 Mm | Compression Height: | 62.7 Mm |
| Piston Ring Sizes: | 3.5 Mm (top) / 2.0 Mm (second) | Weight: | 1.35 Kg |
| Piston Pin Length: | 79 Mm | Engine Stroke: | 132 Mm |
| High Light: | OEM ISUZU 6HH1 piston assembly,Alfin steel insert piston 115mm,ISUZU truck piston oil cooling |
||
The Standard Piston Assembly with OEM reference numbers 8-94391598-0 and 8943915980 is a verified direct-fit replacement for the ISUZU 6HH1 diesel engine, widely used in ISUZU FRR series trucks as well as FVR, FTR, and FSR models.
| Part Number | 8-94391598-0 / 8943915980 |
| Product Name | Piston |
| Car Model | ISUZU FRR |
| Engine Model | ISUZU 6HH1 |
| Condition | 100% Brand New |
| Size | Standard |
| Origin | China Mainland |
| Main Market | Middle East, Asia, Africa, South America, North America & Europe |
Primary Applications (ISUZU 6HH1 Engine):
| Model | Series / GVM | Drive / Engine |
|---|---|---|
| ISUZU FRR | GVM 10.4T | 4x2 / 6HH1-S-1 |
| ISUZU FSR | GVM 11.0T / 13.0T | 4x2 / 6HH1-S-1 |
| ISUZU FTR | GVM 14.2T | 4x2 / 6HH1-S-1 |
| ISUZU FVR | GVM 15.0T / 17.0T | 4x2 / 6HH1-S-1 |
| ISUZU FTS | GVM 13.0T | 4x4 / 6HH1-S-1 |
⚠️ Important: This piston is specifically designed for the ISUZU 6HH1 diesel engine. It is compatible with FRR, FVR, FTR, and FSR series trucks. Always verify your vehicle's chassis code and original part number before ordering.
| Symptom | Description |
|---|---|
| Loss of compression | Hard starting, reduced engine power, poor fuel economy |
| Excessive oil consumption | Blue smoke from exhaust, frequent oil top-ups |
| Blow-by | Excessive crankcase pressure, oil leaks from breathers |
| Knocking or unusual engine noise | Metallic knocking sounds from the engine |
| Reduced engine performance | Lack of power under load |
| Visible damage | Scoring, cracks, or ring groove wear on the piston |
⚠️ Ignoring a worn or damaged piston can lead to:
- Severe engine damage and complete engine failure
- Damaged cylinder liners and crankshaft bearings
- Costly engine repairs or complete engine replacement
| Feature | Benefit |
|---|---|
| Alfin construction with tinned steel insert | Superior ring groove wear resistance — extends piston service life under high-temperature, high-load diesel engine operation |
| Precision-engineered 115mm bore diameter | Matches factory specifications for ISUZU 6HH1 engine — restores proper compression and combustion efficiency |
| Oil gallery cooling | Enhanced heat dissipation — reduces thermal stress on the piston crown and extends component lifespan |
| Precision-machined ring grooves | 3.5mm / 2.0mm ring groove configuration — ensures proper ring seating and sealing |
| 36mm piston pin with 79mm length | Factory-correct pin specification — ensures proper connecting rod fitment |
| Designed for 6HH1 diesel engine | Correct specification for ISUZU 6HH1 engine — ensures proper combustion and performance |
| Direct OE replacement | No modifications required — matches factory specifications precisely |
| ISO/TS16949 certified manufacturing | Consistent quality and reliability — meets international automotive quality standards |
| 100% quality inspected | Reliable out of the box — each unit verified for dimensional accuracy and material integrity |
| QC Item | Verification Method |
|---|---|
| Dimensional accuracy | Precision measurement against OE blueprint — critical dimensions: 115mm bore, 106.5mm height, 62.7mm compression height |
| Material composition | High-grade aluminum alloy with Alfin steel insert verification — ensures proper heat and wear resistance |
| Ring groove precision | 3.5mm / 2.0mm groove verification — ensures proper ring seating |
| Pin bore accuracy | 36mm diameter verification — ensures proper pin fitment |
| Surface treatment | Tinned Alfin steel verification — ensures ring groove durability |
| Oil gallery integrity | Cooling passage verification — ensures proper oil flow for heat dissipation |
| Hardness testing | Comprehensive material integrity testing |
| Batch traceability | Each production batch documented with quality certificates |
⚠️ IMPORTANT: Piston replacement requires mechanical competence and specialized tools. Professional installation strongly recommended.
When to Replace:
- Loss of compression or reduced engine power
- Excessive oil consumption or blue smoke from exhaust
- Blow-by (excessive crankcase pressure)
- Knocking or unusual engine noises
- During complete engine overhaul or rebuild
- Visible piston damage (scoring, cracks, or ring groove wear)
Installation Guidelines (Reference ISUZU workshop manual for complete steps):
- Safety first — allow engine to cool completely before starting work
- Drain engine oil and coolant
- Remove the cylinder head and oil pan
- Remove the connecting rod caps and push pistons out from the top
- Inspect the cylinder bores for wear, scoring, or damage
- Measure the cylinder bore to verify proper piston-to-bore clearance (0.02-0.05 mm factory specification)
- Compare the new piston with the old unit — verify part number (8-94391598-0) and dimensions (115mm bore, 106.5mm height) match
- Install new piston rings (sold separately — ISUZU 6HH1 piston ring set) — ensure proper ring gap and orientation
- Lubricate the piston and cylinder bore with clean engine oil
- Install the piston with a ring compressor — ensure correct orientation (notch or arrow toward front of engine)
- Connect the connecting rod to the crankshaft and torque bolts to manufacturer specification
- Reassemble all components, refill with fresh oil and coolant
- Start engine and perform break-in procedure
Pro Tips:
- Always replace piston rings when replacing pistons — ensure proper sealing and compression
- Have the cylinder bores measured and honed if necessary
- Use only high-quality engine oil and filters to protect new pistons
- Follow the manufacturer's break-in procedure for new pistons and rings
- This piston is also available as part of a complete liner kit including pistons, piston rings, and cylinder liners
- Individually sealed in protective packaging
- Available as single piston or as a complete set of 6
- Packed in neutral packaging or carton
- Single unit weight: 1.35 kg
- Set weight (6 pieces): Approx. 8.1 kg
- Bulk wholesale available in master cartons
- Suitable for: ISUZU specialist repair shops, commercial vehicle maintenance depots, engine rebuilders, auto parts distributors
Oil Power Steering Pump Assembly for ISUZU NPR 4HF1 8971365740 8971151350 8-97136574-0 8-97115135-0
Oil Power Steering Pump Assembly for ISUZU NPR 4HF1 8971365740 8971151350 8-97136574-0 8-97115135-0 Part Number: 8971365740 8971151350 8-97136574-0 8-97115135-0 Product Name: Oil Power Steering Pump Car Model: ISUZU NPR Engine Model: ISUZU 4HF1 Condition: 100% Brand New Size: Standard Weight: ...
Clutch Disc for ISUZU NPR 4BD1 8-97083723-0 8970837230
Clutch Disc for ISUZU NPR 4BD1 8-97083723-0 8970837230 Part Number: 8-97083723-0 8970837230 Product Name: Clutch Disc Car Model: ISUZU NPR Engine Model: ISUZU 4BD1 Condition: 100% Brand New Size: Standard Weight: Standard Origin: China Mainland Main Market: Middle East ,Asia,Africa, South America, ...
Rear Final Drive Assembly for ISUZU NKR55 8943389020 8-94338902-0
Rear Final Drive Assembly for ISUZU NKR55 8943389020 8-94338902-0 Part Number: 8943389020 8-94338902-0 Product Name: Rear Final Drive Assembly Car Model: ISUZU NKR55 Engine Model: ISUZU NKR55 Condition: 100% Brand New Size: Standard Weight: Standard Origin: China Mainland Main Market: Middle East ...
Turbocharger Assembly for ISUZU XE 6HK1 1-14400390-0 1144003900
Turbocharger Assembly for ISUZU XE 6HK1 1-14400390-0 1144003900 Part Number: 1-14400390-0 1144003900 Product Name: Turbocharger Assembly Car Model: ISUZU XE Engine Model: ISUZU 6HK1 Condition: 100% Brand New Size: Standard Weight: Standard Origin: China Mainland Main Market: Middle East ,Asia,Africa...
