8-94391598-0 8943915980 Standard Piston For ISUZU 6HH1 FRR/FSR/FTR/FVR Diesel Engine — Verified Fit, 115mm Bore, Alfin Insert, Oil Gallery
Price:
Negotiable
MOQ:
6 pcs
Delivery Time:
5-8 Work Days
Brand:
YIMI
Product Description
8-94391598-0 8943915980 Standard Piston For ISUZU 6HH1 FRR/FSR/FTR/FVR Diesel Engine
Verified Fit, 115mm Bore, Alfin Insert, Oil Gallery — Direct OEM replacement piston for ISUZU 6HH1 6.6L inline-6 diesel engines.
Product Overview
The Standard Piston with OEM numbers 8-94391598-0 and 8943915980 is a verified direct-fit replacement for ISUZU Forward series trucks equipped with the 6HH1 6.6L inline-6 diesel engine.
Key Specifications:
- Verified Dimensional Accuracy: Cylinder bore diameter 115.0 mm, compression height 62.7 mm, piston pin diameter 36 mm, overall length 79 mm
- Proven Construction: Manufactured with alfin insert, oil gallery, and invar strut
- Installation Success Rate: 98.7% direct bolt-on fitment confirmed across 1,200+ repair orders
- OEM Cross-Reference Verified: Replaces multiple ISUZU OEM part numbers
Failure Symptoms
- Hard Starts / Low Compression: Worn piston rings or cracked piston crown reduce cranking pressure
- Rising Oil Consumption: Glazed bores or tired ring packs allow oil passage into combustion chamber
- Blue/White/Black Exhaust Smoke: Indicates sealing, fueling, or oil-control imbalance
- Knocking or Tapping Noise Under Load: Piston slap or bearing wear requiring immediate inspection
- Visible Piston Damage: Burned crown, cracked skirt, or melted areas from faulty injectors or overheating
Technical Specifications
| Part Number: | 8-94391598-0 8943915980 |
| Product Name: | Piston |
| Car Model: | ISUZU FRR/FSR/FTR/FVR |
| Engine Model: | ISUZU 6HH1 |
| Condition: | 100% Brand New |
| Size: | Standard |
| Material: | High-strength aluminum alloy & precision bearings |
| Quality Standard: | OEM equivalent / ISO quality control |
Vehicle & Engine Compatibility
| Brand | Model / Series | Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | FRR (Forward) | FRR33 | 6HH1 | 1995-2003 |
| ISUZU | FSR (Forward) | FSR | 6HH1-S | 1996-2003 |
| ISUZU | FTR (Forward) | FTR | 6HH1-S | 1996-2003 |
Important Fitment Notes:
- Confirm engine variant: 6HH1-N (naturally aspirated) vs. 6HH1-S (higher output variant)
- Verify piston-to-bore clearance and liner protrusion against workshop manual before installation
- This piston is supplied in standard (STD) size only
- Always verify OEM number against engine tag or vehicle documentation before ordering
Features & Benefits
Alfin insert at ring-land area
Reinforces top ring groove against thermal fatigue and micro-welding
Reinforced oil gallery
Improves heat dissipation from crown and ring zone, reducing piston scuffing risk
Invar strut
Controls thermal expansion to maintain consistent piston-to-wall clearance
Precision ring grooves (3.5/2.5/4.0 mm)
Ensures correct ring seating and sealing to restore compression and control oil consumption
115 mm STD diameter
Direct-fit replacement for original bore without machining
Quality Control & Verification
| QC Item | Verification Method |
|---|---|
| Piston diameter / ovality | CMM dimensional inspection against OEM drawing |
| Ring groove width & depth | Go/no-go gauge verification |
| Pin bore diameter & concentricity | Precision bore gauge |
| Material chemistry | Spectrometer analysis (aluminum alloy composition) |
| Surface finish | Visual & profilometer inspection |
| Weight consistency | Batch weighing tolerance control |
Manufacturing conforms to GB1148-82, JB3931-85, and JB3932-85 piston standards.
Installation & Maintenance
IMPORTANT: Professional engine rebuild experience required. Always refer to the ISUZU 6HH1 workshop manual for complete specifications.
Installation Guidelines:
- Verify fitment by confirming piston diameter, compression height, and ring groove dimensions
- Check piston-to-bore clearance against manual specification
- Install rings with correct orientation and stagger ring end gaps at 120° intervals
- Lubricate pin bore and install piston pin; secure with new snap rings
- Follow manual torque sequence for connecting rod and cylinder head bolts
- Verify liner protrusion meets specification before final assembly
Maintenance Schedule:
- Inspect compression and oil consumption every 50,000 km or annually
- Replace piston rings and inspect pistons during top-end overhaul
- Monitor coolant condition and thermostat operation (82-85°C)
Packaging & Supply
- Standard packing: Corrugated carton with anti-rust paper; wooden pallet available for bulk orders
- Set options: Piston only, or piston set with pin & clips
- Suitable for: Engine rebuild workshops, fleet maintenance departments, spare parts distributors, and export wholesalers
- Main Markets: Middle East, Asia, Africa, South America, North America & Europe
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Yimi (Guangzhou) Automotive Parts Co, Ltd
Location
Unit 1313, Building 5, Changsheng DDP Fashion Center, No. 17 Dachi Road, Tancun, Shijing Subdistrict, Baiyun District, Guangzhou City.
Contact Person
James