The rod bearing may be a small component, but it plays a big role in keeping your engine running smoothly. When this part starts to wear out, you might notice concerning symptoms like knocking noises or poor performance, which can signal a bigger problem ahead.
So, how much does a rod bearing replacement cost?
And is it worth the investment?
Let’s dive into the expected costs, understand whether a replacement is worth it, and explore the consequences of not getting timely replacements.
This Article Contains:
- How Much Does a Rod Bearing Replacement Cost?
- Is it Worth Replacing a Worn Rod Bearing?
- 5 Unmistakable Signs You Need a Rod Bearing Replacement
- How Long Do Rod Bearings Last?
- What Is the Difference Between a Rod Bearing and the Main Bearing?
How Much Does a Rod Bearing Replacement Cost?
Here’s a breakdown of the expenses involved in replacing a rod bearing:
A. Range
The average rod bearing replacement cost is between $800 and $3,400+.
This includes:
- Parts: $50 to $400+
- Labor: $750 to $3,000
B. Factors Affecting Cost
The total cost of replacing a bad rod bearing can depend on several factors, including:
- Number of rod bearings: Engines can have multiple rod bearings, which vary significantly based on their design and cylinder layout. For example, most vehicles have one rod bearing per crank pin. This means a V8 engine would have 8 rod bearings. Similarly, a four-cylinder engine would typically have 4 rod bearings.
- Repair complexity: Some engines are relatively easy to disassemble, while others require lifting or lowering the engine to access the rod bearings. The less accessible the bearings are, the higher will be the mechanic’s labor charge.
- Repair shop type: Going to an independent repair shop is often cheaper than going to the dealership, as the latter tends to have higher labor rates. However, they generally offer high-quality service.
- Additional repairs: If your rod bearings are on their way out, you’ll likely need to replace other engine parts, such as the cylinder head bolts, head gasket, oil pump, or oil filter. A new oil pump can set you back $1,625, while an engine gasket replacement can cost around $1,500.
Is it Worth Replacing a Worn Rod Bearing?
Yes, it is, as ignoring rod bearing repair can lead to extensive engine damage.
Without the friction control provided by rod bearings, the connecting rods risk detaching from the crankshaft, potentially damaging the cylinder bore and engine block. This can result in the need for a complete engine rebuild, which typically costs between $2,500 and $4,000.
Getting ahead of the issue by replacing a faulty rod bearing can help avoid these complications.
5 Unmistakable Signs You Need a Rod Bearing Replacement
Not sure if your rod bearing needs replacing?
Here are some key signs to watch out for:
- Rod knock: One of the most noticeable signs of a failing rod bearing is a distinct knocking or tapping noise from the engine. This sound, often called “rod knock, usually becomes louder during acceleration or at higher speeds. It’s often caused by excessive wear on the rod bearings, which loosen the connection between the connecting rods and the crankshaft, allowing the rod to move more irregularly.
- Oil-related issues: Worn bearings can create more clearance between the rod and the crankshaft, leading to a drop in oil pressure. This can trigger a warning light on your dash or show a low oil reading on the oil gauge. Additionally, failing bearings contaminate the oil, causing it to carry metal shavings or develop a silver sheen, indicating excessive wear.
- Engine misfires: Rod bearing failure can cause issues with the engine’s timing and performance, leading to a noticeable loss of power. This usually manifests as poor acceleration, sluggishness, or an overall reduction in engine responsiveness.
- Engine failure: If left unchecked, rod bearing issues can lead to engine failure. When bearings fail, they disrupt the connection between the connecting rod and the crankshaft, resulting in the rod piercing the crankcase and leading to catastrophic engine failure.
- Transmission issues: Although not a direct cause, rod bearing failure can prevent the smooth transfer of force to the crankshaft. This places increased pressure and tension on the transmission system.
How Long Do Rod Bearings Last?
Rod bearings typically last between 60,000 and 80,000 miles. However, their lifespan can vary depending on several factors, including:
- Low oil level: When there’s not enough oil, the rod bearing doesn’t get the lubrication it needs, speeding up wear and tear due to friction.
- Contaminated oil: Metal shavings, dirt, or debris in the engine oil can damage the bearing surface, increasing wear and leading to premature failure.
- High engine temperatures: At high temperatures, oil begins to lose its viscosity and breaks down, reducing its ability to lubricate the bearings.
- Excessive engine load and high RPMs: Driving at high speeds for long periods and towing heavy loads can lead to overlay fatigue. This causes thin cracks to develop on the rod bearing’s surface.
- Low-quality bearings: Using sub-par or low-quality parts can lead to premature rod bearing failure due to their inability to handle engine stress. This is especially true in high-performance engines, which generate higher pressures and temperatures.
What Is the Difference Between a Rod Bearing and the Main Bearing?
While both bearings have similar roles in reducing friction and supporting rotational motion, they differ in their location and support different components.
Let’s take a closer look:
- Rod bearings: These bearings sit between the connecting rods and the crankshaft, allowing the pistons to move up and down smoothly. The crankshaft then uses that motion to generate rotational movement that drives the vehicle.
- Main bearings: The main bearings are located along the crankshaft’s main journals, which rest within the engine block. They support the crankshaft, allowing it to spin smoothly while maintaining proper alignment.
Rod Bearing Replacement Made Easy with AutoNation Mobile Service
If you’re experiencing strange engine noises or performance drops, a worn rod bearing might be the culprit — and it’s not something to ignore.
Fortunately, AutoNation Mobile Service makes fixing your vehicle easier than ever.
Our skilled technicians can come to you and replace the faulty rod bearing right from your driveway.
What’s more?
You’ll get a 12-month, 12,000-mile warranty on all repairs.
Book an appointment today, and we’ll have your car running like new again.