Long Engine Cylinder Block for Cummins 4BT3.9 4BTA3.9 Diesel Engine
Basic Properties
Trading Properties
Product Name: Cummins 4BT3.9 Engine Long Block Assembly
Engine Model: Cummins 4B / 4BT / 4BTA 3.9L inline-4 turbo diesel
OE Reference: 3929038, 3929039, 3936034, 3943955
Displacement: 3.9L (3900 cc)
Bore × Stroke: 102 × 120 mm
Compression Ratio: 17.5:1 (typical)
Configuration: Long block assembly includes cylinder block, crankshaft, pistons, piston rings, connecting rods, cylinder liners, main bearings, and rod bearings. (Cylinder head, fuel system, and front gear housing NOT included.)
Specifications:
- Cast iron cylinder block, precision machined deck surface
- Forged steel crankshaft, dynamically balanced
- Aluminum alloy pistons, tin-plated for wear resistance
- Wet-type replaceable cylinder liners
- Main bearing caps torqued to OEM specification
- Oil galleries cleaned, pressurized tested, anti-rust coated
Applications (Reference):
- Light-duty trucks: Dodge Ram 50, Ford Cargo, International Harvester
- Construction equipment: Mini excavators, skid steers, compact loaders
- Power generation: 30–60 kVA Cummins diesel generators
- Marine auxiliary engines and industrial pumping units
- Agricultural tractors and irrigation equipment

|
No
|
Item
|
Data
|
|
1
|
product name
|
Auto engine parts engine block
|
|
2
|
Engine NO.
|
4BT 3.9
|
|
3
|
Engine Type
|
Diesel engine
|
|
4
|
Suitable vehicle
|
For Cummins
|
|
5
|
Function
|
for engine parts engine cylinder block repair or replacement
|
|
6
|
G.W
|
120KG
|
|
7
|
Sample policy
|
Sample order is welcome befor mass order to check product quality and fitness
|
|
8
|
Package
|
safety package suitable for international delivery
|





Q3. What are your terms of delivery?
Q4. How about your delivery time?
Q5. Can you produce according to the samples?
Q7. Do you test all your goods before delivery?