Two Yuchai engines dominate the export spare parts business: the six-cylinder YC6108 (also called YC6B) and the four-cylinder YC4D130. Getting the yuchai engine specifications right is the first step to ordering the correct pistons, liners and gaskets, because Yuchai uses similar bore sizes across families that are not interchangeable. Below is the official manufacturer data.
Yuchai Engine Specifications Table
| Model | Cylinders | Bore x Stroke (mm) | Displacement (L) | Rated Power | Peak Torque |
|---|---|---|---|---|---|
| YC6108 / YC6B | 6 inline | 108 x 125 | 6.871 | 86-165 hp (63-120 kW) | varies by version |
| YC4D130 | 4 inline | 108 x 115 | 4.21 | 130 hp (96 kW) @ 2800 rpm | 380 Nm @ 1700-2000 rpm |
YC6108 (YC6B) Specifications in Detail
The YC6108 has a 108 mm bore and 125 mm stroke for 6.871 litres of displacement, with a compression ratio of 17.5:1. Depending on the version it is rated from about 86 hp up to 165 hp at 1500-2300 rpm, covering trucks, buses, wheel loaders, excavators and generator sets. The turbocharged YC6108ZQ versions are the most common in the field. For rebuilds, the Yuchai YC6108 repair kit bundles the liner, piston and gasket parts in one order.
YC4D130 Specifications in Detail
The YC4D130 is a turbocharged, intercooled four-cylinder with a 108 mm bore and 115 mm stroke, 4.21 litres of displacement, and a rated output of 96 kW (130 hp) at 2800 rpm with 380 Nm of torque at 1700-2000 rpm. Dry weight is 380 kg and overall dimensions are about 870 x 670 x 780 mm. It powers agricultural tractors, small loaders and forklifts. A full Yuchai YC4D130 overhaul kit with gasket set covers most service intervals.
Parts Compatibility Between Yuchai Models
- Both engines share the 108 mm bore, but pistons, liners and rings are model-specific because of different strokes and bowl designs.
- Always order a Yuchai YC6108 piston with the engine serial number and emission level.
- YC4D130 parts do not fit the older YC4108 series without checking the part number.
Frequently Asked Questions
What is the Yuchai YC6108 displacement?
The YC6108 (YC6B) displacement is 6.871 litres from a 108 mm bore and 125 mm stroke. It is a six-cylinder engine with a 17.5:1 compression ratio.
How much power does the YC4D130 produce?
The YC4D130 produces 96 kW (130 hp) at 2800 rpm with 380 Nm peak torque between 1700 and 2000 rpm.
EPID Diesel Engine Parts keeps both families in stock with fast export delivery. Visit the Yuchai engine parts page and send us your engine model for a same-day quote on WhatsApp.
