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{"title":"ISUZU TFR68 69 ENGINE MOUNTING R 8970391890","imgUrl":"https:\/\/img.chinax.com\/nimg\/7b\/f1\/8998370f517b467e4c20c8df2ac9-200x200-1\/isuzu_tfr68_69_engine_mounting_r_8970391890.jpg","attrs":{"Model Number":"TFR68 69","Place of Origin":"Made in China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"ISUZU TFR68 69 RUBBER ENG FOO L 5876101930 8970860761","imgUrl":"https:\/\/img.chinax.com\/nimg\/68\/26\/7c7f4c50909a3695c90b2db58900-200x200-1\/isuzu_tfr68_69_rubber_eng_foo_l_5876101930_8970860761.jpg","attrs":{"Model Number":"TFR68 69","Place of Origin":"Made in China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"ISUZU DMAX 4JA1 T H1 GEAR TIMING 52 8979427551","imgUrl":"https:\/\/img.chinax.com\/nimg\/dc\/8f\/faca408a6e5c150d63ac2adb933f-200x200-1\/isuzu_dmax_4ja1_t_h1_gear_timing_52_8979427551.jpg","attrs":{"Model Number":"DMAX 4JA1 T H1","Place of Origin":"Made in China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"ISUZU NHR 4JA1 DMAX CRANKSHAFT 8944552401","imgUrl":"https:\/\/img.chinax.com\/nimg\/e2\/3f\/ae38ad12211136e0e8ec331c8536-200x200-1\/isuzu_nhr_4ja1_dmax_crankshaft_8944552401.jpg","attrs":{"Brand Name":"YIMI","Supply Ability":"10000pcs\/month","Delivery Time":"15-20 days after deposit","Packaging Details":"1, neutral box , 2, color box, 3, customer brand package"}}
{"title":"ISUZU NKR KY 4JB1 CRANKSHAFT 8944436620 1005011BBA1","imgUrl":"https:\/\/img.chinax.com\/nimg\/ef\/20\/c9299ee3da59c593a2e0493b8470-200x200-1\/isuzu_nkr_ky_4jb1_crankshaft_8944436620_1005011bba1.jpg","attrs":{"Brand Name":"YIMI","Supply Ability":"10000pcs\/month","Delivery Time":"15-20 days after deposit","Packaging Details":"1, neutral box , 2, color box, 3, customer brand package"}}
Verified OEM Direct Fit, 95.4mm STD Alfin Oil-Gallery Diesel Piston
Product Overview
The Engine Piston with OEM numbers 8-97367397-1 / 8973673971 is a verified direct-fit replacement for ISUZU 4JJ1 / 4JJ1-TC (3.0L) diesel engines. This piston is a critical reciprocating component responsible for converting combustion pressure into crankshaft rotation and managing thermal load within the cylinder. The 4JJ1 is a 2,999 cc water-cooled inline-4 DOHC 16-valve common-rail diesel engine widely used in ISUZU D-MAX pickups, NPR/NQR commercial trucks, and ELF light-duty trucks from 2004 onward.
Dimensional Verification: Piston diameter 95.4 mm, compression height 49.8 mm, total length 78.4-78.5 mm, pin size 34 × 78 mm, combustion chamber Ø 55 mm, bowl depth -16 mm
Ring Groove Geometry: Ring grooves sized 2.0K mm (top) / 1.5 mm (second) / 3.0 mm (oil control)
Material & Construction: Manufactured from ZL109 aluminum alloy with Alfin insert for ring-land reinforcement, internal oil cooling gallery, and graphite-coated skirt
OEM Cross-Reference Verified: Replaces multiple OEM part numbers and international brand references
Multi-Platform Application: Confirmed compatible with ISUZU D-MAX, NPR, NQR, NHR, NKR, and ELF series trucks and pickups
Failure Symptoms & Replacement Indicators
Loss of engine compression: Worn or stuck piston rings reduce cranking pressure, causing hard starting and noticeable power loss
Increased oil consumption: Glazed bores or tired ring packs allow oil to enter combustion chamber
Piston scoring or scuffing: Visible skirt wear or liner wall scoring caused by thermal expansion or insufficient lubrication
Knocking or tapping noise: Piston slap or bearing wear requiring immediate inspection
Part Number
8-97367397-1 8973673971
Product Name
Piston
Car Model
ISUZU NPR NQR D-MAX ELF
Engine Model
ISUZU 4JJ1 4JJ1-TC
Condition
100% Brand New
Size
Standard
Vehicle & Engine Compatibility
Brand
Model / Series
Engine
Years
ISUZU
D-MAX (TFR/TFS)
4JJ1-TC
2004-2012
ISUZU
NPR
4JJ1-TC
2007+
ISUZU
NQR
4JJ1-TC
2007+
ISUZU
ELF
4JJ1-TC
2004+
Important Fitment Notes: Confirm engine variant (4JJ1 vs. 4JJ1-TC), verify piston-to-bore clearance, and always check OEM number against engine tag before ordering. Piston rings and pin are not included unless specified.
Features & Benefits
Alfin Insert
Reinforces top ring groove against thermal fatigue and micro-welding
Internal Oil Cooling Gallery
Improves heat dissipation from crown and ring zone, reducing scuffing risk
Graphite-Coated Skirt
Provides self-lubricating properties during cold starts and reduces friction
Precision Ring Grooves
Ensures correct ring seating and sealing to restore compression
ZL109 Aluminum Alloy
Lightweight, high-strength material with efficient heat dissipation
95.4 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 (95.4 mm)
Ring groove width & depth
Go/no-go gauge verification (2.0K/1.5/3.0 mm)
Pin bore diameter & concentricity
Precision bore gauge (34 mm)
Material chemistry
Spectrometer analysis (ZL109 aluminum alloy)
Surface treatment thickness
Graphite coating thickness measurement
Manufacturing conforms to ISO/TS16949 and ISO9001:2000 quality standards. Each unit undergoes 100% quality inspection before packaging.
Installation & Maintenance
Professional engine rebuild experience required. Always refer to the ISUZU 4JJ1 workshop manual for complete specifications. Improper installation can result in engine damage and serious injury.
Installation Guidelines:
Verify fitment: Confirm piston diameter (95.4 mm), compression height (49.8 mm), 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 with new snap rings
Follow connecting rod torque sequence per manual specifications
Maintenance Schedule:
Engine oil capacity: 6.5-7.0L including filter - replace every 10,000 km or 12 months
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 EGR system regularly
Packaging & Supply
Standard packing: Neutral packaging / corrugated carton
Set options: Piston only, or piston set with pin & clips
Minimum order: 4 pcs per order
Export packing: Wooden crate, moisture barrier options available
Suitable for: Engine rebuild workshops, fleet maintenance, spare parts distributors
Related parts available: Piston ring sets, cylinder liner kits, and full 4JJ1 overhaul kits
Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...
