11030747 Lock Washer | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta lock washer from the cooling system group, used to secure threaded fasteners on cooling system components and prevent them loosening under engine vibration and thermal cycling. It is a service replacement item for TWD, TAD and TD series industrial and generator-set diesel engines. Lock washers are single-use hardware and should be renewed whenever the joint they secure is disturbed.

🚤 Compatibility

Typically suits:

• Volvo Penta TWD1240VE
• Volvo Penta TWD1643GE
• Volvo Penta TWD1652GE
• Volvo Penta TWD1653GE
• Volvo Penta TD164KAE
• Volvo Penta TWD1644-45GE
• Volvo Penta TAD1631GE
• Volvo Penta TWD1663GE
• Volvo Penta TWD1682-83GE
• Volvo Penta TAD1631G
• Volvo Penta TWD1672-1673GE

• Engine Family: TWD, TD, TAD
• HP Range: Approximately 450-800 HP
• Year Range: Approximately 1980s - 2010s

⚙️ Key Features

• Genuine Volvo Penta OEM part number 11030747
• System group: Cooling System
• Net weight: 0.057 kg
• Fits TWD, TAD and TD series industrial and generator-set diesel engines
• Recommended for replacement whenever the fastener it secures is removed
• Engine type: Volvo Penta inline 6-cylinder 16-litre diesel

🔌 Function

The lock washer sits under a nut or bolt head on a cooling system assembly and maintains clamping tension so the fastener resists loosening from vibration and heat cycling. It helps keep the joint tight and leak-free in service.

⚠️ Common Signs of Failure

• Fastener working loose or losing torque in service
• Flattened, distorted or fatigued washer with no remaining spring tension
• Corrosion, pitting or scaling from coolant exposure
• Cracking or breakage of the washer, allowing the joint to separate
• Coolant weeping at a joint due to loss of clamping force

🛠️ Service Notes

• Lock washers are single-use: the spring or the lock is set by the first tightening, so fit a new one whenever the fastener is disturbed
• Refit in the same arrangement as the parts came off, with the washer bearing on a clean, flat, undamaged seat
• Where the washer is a tab or bent type, bend the tab firmly against a flat of the fastener after final tightening, and never bend the same tab back and forth twice
• Tighten the fastener to the figure in the workshop manual for your engine — a lock washer secures a correctly tightened fastener, it does not compensate for a slack one

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 11030745 - Related cooling-water pipe
• 11030751 - Related sealing ring
• 11032176 - Related water pump
• 11032124 - Related water-pump bracket

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging