How much does a front crankshaft seal cost?

What is a front crankshaft seal?

The front crankshaft seal, often referred to as the front main seal, is a vital component in your vehicle's engine. It serves to prevent engine oil from leaking where the crankshaft extends through the front of the engine block. This seal ensures that oil remains within the engine, maintaining proper lubrication of internal components and preventing contaminants from entering.

Constructed typically from durable rubber or silicone materials, the front crankshaft seal is designed to withstand the harsh conditions of engine operation, including high temperatures and constant motion. Over time, however, the seal can degrade due to factors such as age, heat, and exposure to engine oil, leading to potential leaks.​

Symptoms indicating the need for replacement

Recognising the signs of a failing front crankshaft seal is crucial to prevent further engine damage. Common symptoms include:​

• Oil Leaks at the Front of the Engine: Visible oil spots under the front of your vehicle may indicate a leaking seal.​

• Low Engine Oil Levels: A deteriorating seal can lead to gradual oil loss, necessitating frequent top-ups.​

• Burning Oil Smell: Oil leaking onto hot engine components can produce a noticeable burning odour.

• Smoke from the Engine Bay: In severe cases, oil contacting the exhaust manifold may cause smoke.​

• Illuminated Oil Pressure Warning Light: A significant drop in oil pressure due to leakage can trigger dashboard warnings.​

If you observe any of these symptoms, it's advisable to consult a qualified mechanic promptly to assess and address the issue.

How is the front crankshaft seal replaced?

Replacing the front crankshaft seal involves several steps and should be performed by a professional mechanic:​

• Diagnosis: The mechanic will inspect the engine to confirm the source of the oil leak.​

• Preparation: The vehicle is safely lifted, and the engine's front components, including the drive belts and crankshaft pulley, are removed to access the seal.​

• Seal Removal: The faulty seal is carefully extracted without damaging the surrounding components.​

• Installation of New Seal: A new seal is installed, ensuring it sits flush and is properly lubricated to prevent immediate wear.​

• Reassembly: All previously removed parts are reinstalled, and the engine is started to check for leaks.​

This process requires specific tools and expertise, highlighting the importance of professional service for such repairs.

Tips to remember

• Timely Replacement: Addressing a leaking front crankshaft seal promptly can prevent more severe engine damage and costly repairs.​

• Regular Maintenance: Routine engine inspections can help detect early signs of seal wear or failure.​

• Quality Parts: Using high-quality replacement seals can enhance durability and performance.​

• Professional Service: Given the complexity of the replacement process, it's recommended to have the work done by experienced mechanics.​

Importance of replacing a faulty front crankshaft seal

Neglecting a compromised front crankshaft seal can lead to significant engine issues, including:​

• Engine Damage: Continuous oil leakage can result in insufficient lubrication, causing internal engine components to wear prematurely.​

• Overheating: Low oil levels may lead to increased engine temperatures, risking overheating.​

• Environmental Concerns: Oil leaks contribute to environmental pollution and may result in fines or failed vehicle inspections.​

Therefore, replacing a faulty front crankshaft seal is not only crucial for your vehicle's health but also for environmental and regulatory compliance.​

If you suspect your front crankshaft seal needs replacement, get a free quote from a specialist today!