Restore your machine compression instantly. This premium 324-4235 Piston (or 3244235) and heavy-duty 5I-7523 Cylinder Liner (or 5I7523) form a high-precision, direct-fit Liner Kit developed for your Caterpillar 320D excavator with a C6.4 Engine.
| Model NO. | Caterpillar 320D Excavator / C6.4 Engine |
| Product Name | Liner Kit (Includes Piston, Liner, Rings, Wrist Pin, and Snap Rings) |
| Part Number | Piston: 324-4235 (3244235) | Liner: 5I-7523 (5I7523) |
| Type / Condition | Heavy Duty Rebuild Part / Brand New, OEM Standard Replacement |
| MOQ & Stock | 1 Piece / In Stock & Ready to Dispatch |
| Payment & Delivery | T/T, Western Union, MoneyGram / DHL, Fedex, EMS, UPS, Air or Sea Freight |
| Procurement Point | Our Premium OEM Standard Kits | Low-Cost Alternatives |
|---|---|---|
| 1. Base Metallurgy | High-silicon aluminum piston + induction-hardened liner. | Standard low-grade alloy vulnerable to heat fatigue. |
| 2. Thermal Resistance | Uniform expansion prevents crown cracking. | Uneven expansion causing early piston distortion. |
| 3. Wear Properties | Precise cross-hatch bore honing preserves oil retention. | Glazes quickly, resulting in poor lubrication. |
| 4. Tolerances | Accurate clearances eliminate engine piston slap. | Loose manufacturing tolerances risk scuffing. |
| 5. High Pressure Sealing | Perfect ring groove seating stops crankcase blow-by. | Weak seal design causing power loss and smoke. |
| 6. Maintenance Lifespan | Long service life matching original specifications. | Early breakdown risks and high machine downtime. |
This is caused by piston rings losing their seal against the cylinder liner. Installing our new 324-4235 piston and 5I-7523 liner completely restores the seal and stops oil bypass.
Scoring happens when excessive operating temperatures cause the piston to expand rapidly and touch the cylinder wall. Our high-tolerance materials prevent this by ensuring uniform expansion under thermal stress.
OEM-standard tri-metal structure, trusted by repair shops & equipment fleets worldwide to deliver maximum reliability.
Our technical team helps operators globally to:
Identify potential risks during maintenance.
Recommend suitable replacement parts if needed.
Support both inspection advice and parts supply.
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