Prevent catastrophic coolant loss and maintain internal casting pressure with our Premium 20412733 (11700344) Engine Block Expansion Plug Cores for VOLVO EC210B, EC240B, and EC300D excavators. Get direct factory pricing, bulk B2B discounts, and fast global air express shipping from China's leading powertrain components supplier today!
Lock In Coolant Pressure, Prevent Casting Crack Ruin. Corroded or loose plugs trigger coolant leakage and pressure drop, easily causing engine overheating and cylinder block cracking. This hardened press-fit plug reliably seals cooling channels to protect D4D/D6D/D6E/D7E engine cooling system.
High-strength Thick Steel Plate Solid rigidity withstands coolant pressure surge, effectively avoiding pop-out failure.
Anti-rust Electroplated Coating Resist internal pitting and scale erosion under long-term coolant immersion.
Precision Taper Interference Design Tight assembly fit eliminates fluid seepage along contact surfaces.
Matched Thermal Expansion Performance Synchronize expansion and contraction with cylinder block for stable sealing in varying temperatures.
| Technical Parameter | Specification Details |
|---|---|
| Main Part Number | 20412733 / VOE20412733 |
| Alternative Part Number | 11700344 / VOE11700344 |
| Product Type | Cylinder Block Cooling Core Freeze Expansion Plug |
| Applicable Medium | Pressurized antifreeze, high temperature steam, anti-rust fluid |
| Main Material | High strength stamped carbon steel alloy |
| Installation Mode | Heavy interference press-fit sealing |
Crawler Excavators: EC140B,EC160B,EC180D,EC200B,EC200D,EC210B,EC210B Prime,EC210D,EC220D,EC240B,EC240B Prime,EC250D,EC290B,EC290B Prime,EC300D
Replace expansion plugs completely during engine overhaul. Thin inferior plugs easily rust through and eject, bringing severe overheating risks. Repair shops and suppliers prefer stocking genuine 20412733/11700344 plugs. Match with other expansion plugs, cooling gaskets and head gaskets to assemble full engine maintenance kit.
Coolant crystalline residue accumulates on engine exterior, presenting obvious slow leakage traces
Frequent coolant level decline while no leakage found on external pipelines and joints
Severe rust pits on plug surface, thin wall prone to cracking and sealing failure
All models for compatibility reference only. Reliable expansion plug locks cooling pressure steadily, cuts coolant loss and overheating damage, ensures safe long-term operation of construction machinery engines.