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Genuine YC4D120-21(D1204) Engine Parts - Cylinder Block, Piston, Cylinder Head & Mounting Components

100% Yuchai OEM parts for YC4D120-21(D1204) turbocharged diesel engine.

Covers cylinder block, piston, cylinder head, timing gear housing & engine mounting.

Perfect fitment, durable & 12-month warranty.

 

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    product details

    Application & Compatibility

    df80b7cd57a193214e888af0eee53778

    Engine Model

    YC4D120-21(D1204)

    Rated Power

    120 HP (90 kW) @ 2800 rpm

    Rated Torque

    420 N·m @ 1600-1900 rpm

    Emission Standard

    Euro II / China II

    Application Field

    Light-duty/medium-duty trucks, low-tonnage medium trucks, small construction machinery

    Core Advantages

    Low fuel consumption (≤205g/kW·h), high reliability (alloy cast cylinder block), easy maintenance (universal parts), turbocharged intercooled power system

    Product Description

    Power, Precision, Partnership: The Genuine Yuchai Ecosystem

    Choose the authentic power legacy of Yuchai. Our 100% genuine OEM parts for the YC4D120-21(D1204) engine are designed to restore its original horsepower, torque, and efficiency, delivering the true Yuchai DNA.

    Uncompromised Quality, Forged on the Original Line

    Every part is produced to identical specifications under the stringent Yuchai Quality Control System (QCS), guaranteeing perfect fitment, durability, and seamless integration to preserve engine value.

    Your One-Stop Solution for Assured Performance

    We provide a comprehensive, one-stop supply—from components to complete kits, backed by technical support. This

    Detail Parts List

    1、 D1204-1001000/01 Engine suspending assembly

    1

    No.

    Part No.

    Name

    Qty.

    Remark

    1

    D1204-1001240

    Front Left assembly

    1

     

    2

    D1204-1001140

    Front Right assembly

    1

    2、 D0708-1002000/13 Cylinder Block Assembly

    2

    No.

    Part No.

    Name

    Qty.

    Remark

    1

    Q1840855TF2

    Bolt M8×55

    3

     

    2

    D30-1002054

    Timing idle gear retaining plate

    1

     

    3

    D30-1002051

    Timing idle gear

    1

     

    4

    D30-1002052

    Idle gear shaft

    1

     

    5

    D30-1002114C

    Cylinder block

    1

     

     

    D2000-1002170

    Cylinder block assembly

     

     

    6

    6105Q-1002022

    Aluminum plug

    1

     

    7

    Q61101

    Grooved tapered screw plug NPT1/8

    1

     

    8

    G0100-1002162A

    Hollow bolt for oil

    4

     

    9

    430-1002163

    Washer

    4

     

    10

    D30--1002740

    Nozzle subassembly

    4

     

    11

    D30-1002068A

    Oil gallery plug

    1

     

    12

    YC24-0408

    Pin 4×8

    2

     

    13

    D30-1002062A

    Camshaft end cover gasket

    1

     

    14

    D30-1002061

    Camshaft end cover

    1

     

    15

    Q40308

    Washer 8

    3

     

    16

    Q150B0820

    Bolt M8×20

    3

     

    17

    6105Q-1002069

    Rear main oil galley plug

    4

     

    18

    330-1002021A

    Main bearing cover bolt

    10

     

    19

    A3000-1002063B

    Cylinder liner O ring

    4

     

    20

    A3000-1002063

    Cylinder liner O ring

    4

     

    21

    D30-1002064B

    Cylinder liner

    4

    3、D0708-1002200/09 Timing Gear Housing Parts

    3

    No.

    Part No.

    Name

    Qty.

    Remark

    1

    Q150B0865TF2

    Bolt M8×65

    3

     

    2

    Q40308

    Washer 8

    32

     

    3

    D30-1002213C

    V belt idle gear shaft

    1

     

    4

    Q43080

    Retaining ring 80

    1

     

    5

    GB/T276-6010-2RS

    Rolling bearing 6010-2RS

    2

     

    6

    Q150B0850

    Bolt M8×50

    2

     

    7

    6105Q-1600011

    Pin

    1

     

    8

    YC209-C065090FR

    Oil seal 65×90

    1

     

    9

    Q150B0870

    Bolt M8×70

    1

     

    10

    Q150B0865

    Bolt M8×65

    2

     

    11

    D30-1002037

    Top dead center pointer

    1

     

    12

    Q1200816

    Stud M8×16

    2

     

    13

    Q150B0820

    Stud M8×20

    5

     

    14

    1D30-1002040

    Fuel injection pump gear cover parts

    1

     

    15

    D30-1002036

    Fuel injection pump gear cover gasket

    1

     

    16

    D30-1002031C

    Timing gear hosing

    1

     

    17

    D30-1002034C

    Timing gear hosing cover gasket

    1

     

    18

    D30-1002033D

    Gear housing cover plate

    1

     

    19

    Q150B0822

    Bolt M8×22

    13

     

    20

    Q40108

    Washer 8

    26

     

    21

    Q340B08

    Nut M8

    5

     

    22

    Q1200865

    Stud M8×65

    3

     

    23

    Q150B0855

    Stud M8×55

    1

     

    24

    D30-1002211C

    V-belt idle gear

    1

     

    25

    D30-1002212B

    Spacer sleeve

    1

    4、D0712-1003000/01 Cylinder Head and Cylinder Head Cover Assembly

    4

    No.

    Part No.

    Name

    Qty.

    Remark

    1

    150-1003043C

    Seal ring

    1

     

    2

    150-1003041F

    Oil filler cap

    1

     

    3

    330-1003013B

    Cylinder head bolt(long)

    4

     

    4

    6105Q-1003085

    Lifting ear

    1

     

    5

    D30-1003017

    Washer

    1

     

    6

    D30-1003022C

    Cylinder head cover gasket

    1

     

    7

    Q614B06

    Threaded plug NPT3/4

    3

     

    8

    D30-1003015B

    Cylinder head

    1

     

     

    D30-1003015B*

    Cylinder head subassembly

    1

     

    9

    6105QA-1003088

    Cylinder head locating pin sleeve

    2

     

    10

    D0300-1003011

    Cylinder head gasket

    1

    Easy Wear Part

    11

    6105Q-1003081

    Water jacket plug(I）

    8

     

    12

    330-1003018B

    Cylinder head bolt(short)

    4

     

    13

    330-1003014B

    Cylinder head bolt(short)

    6

     

    14

    D30-1003018

    Cylinder head bolt(short)

    4

     

    15

    Q1840816

    Bolt M8×16

    10

     

    16

    6105Q-1003085

    Lifting ear

    1

     

    17

    D0708-1003060A

    Cylinder head cover parts

    1

     

    Note: D30-1003015B* includes D30-1003015B Cylinder Head, 6105Q-1003081 Water Jacket Plug (-), 430-1007018 Valve Guide, 430-1007019A Intake Valve Seat, and 430-1007021A Exhaust Valve Seat.

    5、D0200-1004000/07 Piston and Connecting Rod Assembly

    5

    No.

    Part No.

    Name

    Qty.

    Remark

    1

    A30-1004016

    1st compression ring

    4

    Easy Wear Part

    2

    A30-1004017

    2nd compression ring

    4

    Easy Wear Part

    3

    A30-1004030

    Scraper ring

    4

    Easy Wear Part

     

    A30-1004016*

    Piston ring subassembly

    1

     

    4

    D0200-1004015A

    Piston

    4

    Easy Wear Part

    5

    430-1004019

    Piston pin

    4

     

    6

    Q43040

    Retaining ring 40

    8

    Easy Wear Part

    7

    E0200-1004200

    Connecting rod part

    4

     

    8

    530-1004019

    Connecting rod bearing shell

    8

    Easy Wear Part

    Product Advantages

    ●100% Yuchai OEM Genuine Parts：Produced on Yuchai’s original production line, 1:1 matching the engine.
    ●Perfect Fitment：Precision-machined to meet YC4D120-21(D1204) technical specifications, no modification needed.
    ●Durable&Reliable：High-quality materials, passed 300,000+ working hours test.
    ●Global Warranty：12-month warranty, free replacement for quality issues.
    ●One-Stop Supply：Covers all parts of the engine, simplifying procurement.

    Payment & Shipping Terms

    ● MOQ: 1 piece

    ● Packaging: Customizable wooden crate/carton

    ● Delivery: 3-20 working days (express: DHL/FedEx; sea freight for bulk)

    ● Payment: L/C, T/T, Western Union; tracking number provided in 24hrs

    ● After-Sales Service：24-hour technical support, global service network

     

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