Engine spare parts — turbochargers, fuel pumps, starters and gaskets

Engine Parts

Pistons, liners, rings, turbochargers, fuel pumps and full gasket kits for Weichai, Cummins and Sinotruk diesels. Oversize options available.

We supply aftermarket internal engine parts for Caterpillar C-series (3066 / C6.4), Weichai and Cummins engines: injectors and nozzles, pistons and liners, bearing sets, valves, valve guides and seats, gaskets and complete overhaul (rebuild) kits. Every part is cross-referenced by OEM number and matched to the engine model.

When the engine smokes, uses oil, knocks or loses power, a full overhaul kit reseals and rebuilds the top and bottom end in one job and guarantees the matching parts are used together. Confirm the engine model, serial number and the bearing/liner size before ordering.

3066 Engine Overhaul Kit (+0.5 mm) 3066-ENGOV-D for Caterpillar 3066 / S6K Engine
Caterpillar 320B · Caterpillar 320C

3066 Engine Overhaul Kit (+0.5 mm) 3066-ENGOV-D for Caterpillar 3066 / S6K Engine

OEM: 3066ENGOVD / CAC3066ENGOVD
Available · usually $20–200
C6.4 Engine Overhaul Kit (Standard) C6.4-ENGOV-C for Caterpillar 320D / 321D / 323D
Caterpillar 320D · Caterpillar 321D

C6.4 Engine Overhaul Kit (Standard) C6.4-ENGOV-C for Caterpillar 320D / 321D / 323D

OEM: C6.4ENGOVC / CAC6.4ENGOVC
Available · usually $20–200
C6.4 Engine Overhaul Kit (+0.5 mm) C6.4-ENGOV-D for Caterpillar 320D / 321D / 323D
Caterpillar 320D · Caterpillar 321D

C6.4 Engine Overhaul Kit (+0.5 mm) C6.4-ENGOV-D for Caterpillar 320D / 321D / 323D

OEM: C6.4ENGOVD / CAC6.4ENGOVD
Available · usually $20–200
C6.4 Engine Overhaul Kit C6.4-KS-3245 for Caterpillar 320D / 321D / 323D
Caterpillar 320D · Caterpillar 321D

C6.4 Engine Overhaul Kit C6.4-KS-3245 for Caterpillar 320D / 321D / 323D

OEM: C6.4KS3245 / CAC6.4KS3245
Available · usually $20–200
Camshaft Bushing 5I-7527A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7527)
Caterpillar 320B · Caterpillar 320C

Camshaft Bushing 5I-7527A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7527)

OEM: 5I7527 / CA5I7527
Available · usually $20–200
Camshaft Bushing 5I-7528A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7528)
Caterpillar 320B · Caterpillar 320C

Camshaft Bushing 5I-7528A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7528)

OEM: 5I7528 / CA5I7528
Available · usually $20–200
Camshaft Bushing 5I-7529A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7529)
Caterpillar 320B · Caterpillar 320C

Camshaft Bushing 5I-7529A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7529)

OEM: 5I7529 / CA5I7529
Available · usually $20–200
Camshaft 5I-8068A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-8068)
Caterpillar 312B · Caterpillar 312C

Camshaft 5I-8068A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-8068)

OEM: 5I8068 / CA5I8068
Available · usually $20–200
Cylinder Liner / Sleeve 5I-7523A for Caterpillar 3066 / C6.4 Engine (Replaces 5I-7523)
Caterpillar 312 · Caterpillar 313D

Cylinder Liner / Sleeve 5I-7523A for Caterpillar 3066 / C6.4 Engine (Replaces 5I-7523)

OEM: 5I-7523 / 5I7523
Available · usually $20–200
Connecting Rod Bearing (STD) 294-1748 for Caterpillar CAT C4.2 / C6.4 Engine (Replaces 294-1748)
Caterpillar 312D · Caterpillar 313D

Connecting Rod Bearing (STD) 294-1748 for Caterpillar CAT C4.2 / C6.4 Engine (Replaces 294-1748)

OEM: 2941748 / CA2941748
Available · usually $20–200
Connecting Rod Bearing Set 5I-7637A1 for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7637)
Caterpillar 320B · Caterpillar 320C

Connecting Rod Bearing Set 5I-7637A1 for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7637)

OEM: 5I7637 / CA5I7637
Available · usually $20–200
Connecting Rod Bolt 094-7154A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 094-7154)
Caterpillar 312C · Caterpillar 312D

Connecting Rod Bolt 094-7154A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 094-7154)

OEM: 0947154 / CA0947154
Available · usually $20–200
Connecting Rod Bushing (Piston Pin) 296-4663 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 296-4663)
Caterpillar 312D · Caterpillar 313D

Connecting Rod Bushing (Piston Pin) 296-4663 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 296-4663)

OEM: 2964663 / CA2964663
Available · usually $20–200
Connecting Rod Bushing 5I-7539A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7539)
Caterpillar 320B · Caterpillar 320C

Connecting Rod Bushing 5I-7539A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7539)

OEM: 5I7539 / CA5I7539
Available · usually $20–200
Crankshaft Thrust Washer 5I-7654A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7654)
Caterpillar 312B · Caterpillar 313D

Crankshaft Thrust Washer 5I-7654A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7654)

OEM: 5I7654 / CA5I7654
Available · usually $20–200
Cummins NT855 Piston 3051555 — Piston Body

Cummins NT855 Piston 3051555 — Piston Body

OEM: 3051555
Available · usually $20–200
Cylinder Head Gasket 222-8331A for Caterpillar 3066 / S6KT / C6.4 Engine (Replaces 222-8331)
Caterpillar 318C · Caterpillar 319C

Cylinder Head Gasket 222-8331A for Caterpillar 3066 / S6KT / C6.4 Engine (Replaces 222-8331)

OEM: 2228331 / CA2228331
Available · usually $20–200
Cylinder Head Gasket 294-1682 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 294-1682)
Caterpillar 320D · Caterpillar 321D

Cylinder Head Gasket 294-1682 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 294-1682)

OEM: 2941682 / CA2941682
Available · usually $20–200
Cylinder Head Valve Guide 305-4885 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 305-4885)
Caterpillar 312D · Caterpillar 313D

Cylinder Head Valve Guide 305-4885 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 305-4885)

OEM: 3054885 / CA3054885
Available · usually $20–200
Full Gasket Set for CAT 3066 / C6.4 Engine
Caterpillar 320B · Caterpillar 320C

Full Gasket Set for CAT 3066 / C6.4 Engine

OEM: FULL-GASKET-SET
Available · usually $20–200
Engine Oil Filter Gasket 125-2979 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 125-2979)
Caterpillar 312D · Caterpillar 313D

Engine Oil Filter Gasket 125-2979 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 125-2979)

OEM: 1252979 / CA1252979
Available · usually $20–200
Turbocharger for CAT 3066 / C6.4 (320D Class)
Caterpillar 320C · Caterpillar 320D

Turbocharger for CAT 3066 / C6.4 (320D Class)

OEM: TURBO-C6.4 / 205-6741
Available · usually $20–200
Exhaust Manifold Gasket 178-6553A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 178-6553)
Caterpillar 312B · Caterpillar 312C

Exhaust Manifold Gasket 178-6553A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 178-6553)

OEM: 1786553 / CA1786553
Available · usually $20–200
Exhaust Valve 294-1685 for Caterpillar CAT C4.2 / C6.4 Engine (Replaces 294-1685)
Caterpillar 312D · Caterpillar 313D

Exhaust Valve 294-1685 for Caterpillar CAT C4.2 / C6.4 Engine (Replaces 294-1685)

OEM: 2941685 / CA2941685
Available · usually $20–200
Exhaust Valve 5I-7739A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7739)
Caterpillar 312B · Caterpillar 320

Exhaust Valve 5I-7739A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7739)

OEM: 5I7739 / CA5I7739
Available · usually $20–200
Exhaust Valve Seat Insert 212-8474A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 212-8474)
Caterpillar 924G

Exhaust Valve Seat Insert 212-8474A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 212-8474)

OEM: 2128474 / CA2128474
Available · usually $20–200
Front Crankshaft Oil Seal 5I-7656A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7656)
Caterpillar 312C · Caterpillar 320B

Front Crankshaft Oil Seal 5I-7656A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7656)

OEM: 5I7656 / CA5I7656
Available · usually $20–200
Full Engine Gasket Set (Overhaul Gasket Kit) 5I-7797A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7797)
Caterpillar 318C · Caterpillar 319C

Full Engine Gasket Set (Overhaul Gasket Kit) 5I-7797A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7797)

OEM: 5I7797 / CA5I7797
Available · usually $20–200
Inlet Valve 5I-7738A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7738)
Caterpillar 312B · Caterpillar 320

Inlet Valve 5I-7738A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7738)

OEM: 5I7738 / CA5I7738
Available · usually $20–200
Intake Valve 212-8477A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 212-8477)
Caterpillar 312B · Caterpillar 312C

Intake Valve 212-8477A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 212-8477)

OEM: 2128477 / CA2128477
Available · usually $20–200
Intake Valve 294-1684 for Caterpillar CAT C4.2 / C6.4 Engine (Replaces 294-1684)
Caterpillar 312D · Caterpillar 313D

Intake Valve 294-1684 for Caterpillar CAT C4.2 / C6.4 Engine (Replaces 294-1684)

OEM: 2941684 / CA2941684
Available · usually $20–200
Intake Valve Guide 183-8172A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 183-8172)
Caterpillar 312B · Caterpillar 312C

Intake Valve Guide 183-8172A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 183-8172)

OEM: 1838172 / CA1838172
Available · usually $20–200
Intake Valve Seat Insert 5I-8011A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-8011)
Caterpillar 318C · Caterpillar 320B

Intake Valve Seat Insert 5I-8011A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-8011)

OEM: 5I8011 / CA5I8011
Available · usually $20–200
Mounting Rubber Cushion 109-9350 for Caterpillar 318C / 320B / 320C / 325C / 329D (Replaces 109-9350 / 393-1046)
Caterpillar 318C · Caterpillar 319C

Mounting Rubber Cushion 109-9350 for Caterpillar 318C / 320B / 320C / 325C / 329D (Replaces 109-9350 / 393-1046)

OEM: 1099350 / CA1099350
Available · usually $20–200
Two Piece Asymmetric Isolation Rubber Mount 266-6299 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 266-6299)
Caterpillar 312C · Caterpillar 314C

Two Piece Asymmetric Isolation Rubber Mount 266-6299 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 266-6299)

OEM: 2666299 / CA2666299
Available · usually $20–200
Two Piece Asymmetric Isolation Rubber Mount 266-6300 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 266-6300)
Caterpillar 320D · Caterpillar 323D

Two Piece Asymmetric Isolation Rubber Mount 266-6300 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 266-6300)

OEM: 2666300 / CA2666300
Available · usually $20–200
Two Piece Asymmetric Isolation Rubber Mount 266-6301 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 266-6301)
Caterpillar 320D · Caterpillar 323D

Two Piece Asymmetric Isolation Rubber Mount 266-6301 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 266-6301)

OEM: 2666301 / CA2666301
Available · usually $20–200
Main Bearing Set 5I-7588A1 for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7588)
Caterpillar 312 · Caterpillar 320B

Main Bearing Set 5I-7588A1 for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7588)

OEM: 5I7588 / CA5I7588
Available · usually $20–200
Middle Water Hose 7Y-1941A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 7Y-1941)
Caterpillar 320B · Caterpillar 321B

Middle Water Hose 7Y-1941A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 7Y-1941)

OEM: 7Y1941 / CA7Y1941
Available · usually $20–200
Engine Oil Cooler Core 125-2970A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 125-2970)
Caterpillar 318C · Caterpillar 319C

Engine Oil Cooler Core 125-2970A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 125-2970)

OEM: 1252970 / CA1252970
Available · usually $20–200
Oil Pan Gasket 5I-7666A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7666)
Caterpillar 318C · Caterpillar 319C

Oil Pan Gasket 5I-7666A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7666)

OEM: 5I7666 / CA5I7666
Available · usually $20–200
Piston (102 mm, with Rings, STD) 324-4235 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 324-4235)
Caterpillar 320D · Caterpillar 321D

Piston (102 mm, with Rings, STD) 324-4235 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 324-4235)

OEM: 3244235 / CA3244235
Available · usually $20–200
Piston with Pin and Clips 297-7750A (STD) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 297-7750)
Caterpillar 924G

Piston with Pin and Clips 297-7750A (STD) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 297-7750)

OEM: 2977750 / CA2977750
Available · usually $20–200
Piston with Pin and Clips 297-7753A (STD) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 297-7753)
Caterpillar 320C

Piston with Pin and Clips 297-7753A (STD) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 297-7753)

OEM: 2977753 / CA2977753
Available · usually $20–200
Piston Pin 094-7134A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 094-7134)
Caterpillar 312B · Caterpillar 312C

Piston Pin 094-7134A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 094-7134)

OEM: 0947134 / CA0947134
Available · usually $20–200
Piston Pin Retainer 5I-7667A (Snap Ring) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7667)
Caterpillar 312B · Caterpillar 320B

Piston Pin Retainer 5I-7667A (Snap Ring) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7667)

OEM: 5I7667 / CA5I7667
Available · usually $20–200
Piston Ring Set 178-6543A (STD) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 178-6543)
Caterpillar 312B · Caterpillar 312C

Piston Ring Set 178-6543A (STD) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 178-6543)

OEM: 1786543 / CA1786543
Available · usually $20–200
Radiator Formed Coolant Hose 7Y-1943 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 7Y-1943)
Caterpillar 320 · Caterpillar 320B

Radiator Formed Coolant Hose 7Y-1943 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 7Y-1943)

OEM: 7Y1943 / CA7Y1943
Available · usually $20–200
Radiator Coolant Hose 7Y-1942 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 7Y-1942)
Caterpillar 320 · Caterpillar 320B

Radiator Coolant Hose 7Y-1942 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 7Y-1942)

OEM: 7Y1942 / CA7Y1942
Available · usually $20–200
Radiator Upper Hose 265-3654 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 265-3654)
Caterpillar 312D · Caterpillar 313D

Radiator Upper Hose 265-3654 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 265-3654)

OEM: 2653654 / CA2653654
Available · usually $20–200
Rear Crankshaft Seal 5I-7660A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7660)
Caterpillar 312C · Caterpillar 320C

Rear Crankshaft Seal 5I-7660A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7660)

OEM: 5I7660 / CA5I7660
Available · usually $20–200
Serpentine Belt (9PK) 519-524 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 519-524)
Caterpillar 320D · Caterpillar 320D2

Serpentine Belt (9PK) 519-524 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 519-524)

OEM: 519524 / CA519524
Available · usually $20–200
Belt (V-Ribbed / Serpentine) 294-1781 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 294-1781)
Caterpillar 320D · Caterpillar 321D

Belt (V-Ribbed / Serpentine) 294-1781 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 294-1781)

OEM: 2941781 / CA2941781
Available · usually $20–200
Tappet (Valve Lifter) 5I-7627A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7627)
Caterpillar 312 · Caterpillar 320

Tappet (Valve Lifter) 5I-7627A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7627)

OEM: 5I7627 / CA5I7627
Available · usually $20–200
Turbocharger 3551749 for Cummins / Holset (Replaces 3551749)

Turbocharger 3551749 for Cummins / Holset (Replaces 3551749)

OEM: 3551749 / 355-1749
Available · usually $20–200
Exhaust Valve Guide 183-8173A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 183-8173)
Caterpillar 312B · Caterpillar 312C

Exhaust Valve Guide 183-8173A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 183-8173)

OEM: 1838173 / CA1838173
Available · usually $20–200
Valve Pushrod 294-1716 for Caterpillar CAT C4.2 / C6.4 Engine (Replaces 294-1716)
Caterpillar 312D · Caterpillar 313D

Valve Pushrod 294-1716 for Caterpillar CAT C4.2 / C6.4 Engine (Replaces 294-1716)

OEM: 2941716 / CA2941716
Available · usually $20–200
Valve Pushrod 5I-7723A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7723)
Caterpillar 312C · Caterpillar 320C

Valve Pushrod 5I-7723A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7723)

OEM: 5I7723 / CA5I7723
Available · usually $20–200
Valve Seat Insert 5I-8012A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-8012)
Caterpillar 312 · Caterpillar 312B

Valve Seat Insert 5I-8012A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-8012)

OEM: 5I8012 / CA5I8012
Available · usually $20–200
Valve Seat Insert (Exhaust, 30 mm) 305-4884 for Caterpillar CAT C4.2 / C6.4 Engine (Replaces 305-4884)
Caterpillar 312D · Caterpillar 313D

Valve Seat Insert (Exhaust, 30 mm) 305-4884 for Caterpillar CAT C4.2 / C6.4 Engine (Replaces 305-4884)

OEM: 3054884 / CA3054884
Available · usually $20–200
Valve Seat Insert (Inlet, 36 mm) 305-4883 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 305-4883)
Caterpillar 312D · Caterpillar 313D

Valve Seat Insert (Inlet, 36 mm) 305-4883 for Caterpillar CAT C6.4 / 3066 Engine (Replaces 305-4883)

OEM: 3054883 / CA3054883
Available · usually $20–200
Valve Mechanism Spring 5I-7740A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7740)
Caterpillar 312B · Caterpillar 320

Valve Mechanism Spring 5I-7740A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7740)

OEM: 5I7740 / CA5I7740
Available · usually $20–200
Valve Spring Retainer 5I-7625A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7625)
Caterpillar 312 · Caterpillar 320

Valve Spring Retainer 5I-7625A for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 5I-7625)

OEM: 5I7625 / CA5I7625
Available · usually $20–200
Engine components (turbochargers, fuel pumps, starters, gaskets) are quoted on request — send us your OEM number · WhatsApp Telegram

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Frequently Asked Questions
What part grades do you supply?

We supply OEM-supplier, branded and quality aftermarket replacement parts built to match OEM specifications. OEM numbers are shown for reference only.

How do I confirm a part fits my machine?

Send the OEM number of the removed part plus a machine model and nameplate photo — our engineers verify fitment before you pay.

What is the minimum order and lead time?

MOQ is 1 piece; orders consolidate into a single shipment from Xi’an, 7–15 days to most countries.

Do you offer pre-shipment verification?

Yes — we send photos and video of the actual part and export packing for your approval before dispatch.