Crankshaft
It’s buried deep in your engine, and you may well never heard of it—but your car wouldn’t move an inch without its Crankshaft.
The good news is, that you don’t need to understand every engine component to maintain your vehicle correctly. However, a bit of knowledge about key parts can certainly come in handy, particularly when it comes to avoiding expensive repairs. This crucial engine component performs the essential job of converting your pistons’ up-and-down movement into the rotational force that ultimately powers your wheels. The good news? Crankshafts are engineered to last, but don’t take it for granted – maintenance is still essential.
Whilst crankshaft failures aren’t common, your engine’s overall health depends largely on regular servicing. Regular oil changes using high-quality oil prevent premature wear, keeping everything functioning perfectly for years to come.
So, whilst you shouldn’t need to worry about your crankshaft daily, staying up to date with your service schedule is absolutely essential. In this guide, we’ll provide drivers in the Cheltenham and Gloucester areas with a simple overview of what the crankshaft and its position sensor do, why they’re vital, and how regular servicing at Cheltenham & Gloucester Autocentre protects both your engine and your finances.
Discover What a Crankshaft Is
The crankshaft is an indispensable part of a combustion engine. It resides in the lower section of your engine block. This precisely engineered part sits within the protective confines of your engine’s crankcase, with the oil pan mounted beneath, holding the essential lubricating oil.
The crankshaft is an extraordinary piece of engineering. Take a look at this diagram, and you’ll see its many cleverly engineered elements! It’s constructed to withstand immense forces.
The crankshaft incorporates counterweights that significantly reduce vibration. It also features internal oil passages (oilways) allowing lubricant to flow through, shielding it from the tremendous stresses experienced within your engine.
This highlights why premium-quality oil and regular servicing are absolutely crucial. Without proper lubrication reaching these critical areas, metal-to-metal contact would rapidly cause excessive friction, heat accumulation, surface scoring, and ultimately catastrophic engine failure.
Explore How Your Crankshaft Functions
In basic terms, your crankshaft transforms the pistons’ linear motion into rotational energy. This rotation delivers power to your clutch, gearbox, and ultimately your vehicle’s wheels. Simultaneously, the crankshaft drives the camshaft through a timing chain, belt, or gears, ensuring precise valve timing. It can also power essential components such as the alternator, water pump, and air conditioning compressor via pulleys.
Recognise Potential Problems
Your crankshaft should last throughout your vehicle’s lifetime, provided you’ve followed your manufacturer’s recommended service schedule. Crankshaft damage remains unusual in these situations, but when it does occur, it can cause devastating engine damage requiring extensive rebuilding or complete replacement.
What’s more common in modern engines is crankshaft sensor failure. If your vehicle relies on the crankshaft position sensor for timing signals and it malfunctions, the engine cannot operate since the Engine Control Unit (ECU) requires this data for ignition and fuel injection timing.
Understanding the Crankshaft Position Sensor
The crankshaft position sensor is an electronic component that monitors your engine’s crankshaft. Attached to the engine block, this sensor detects the crankshaft’s movement and generates signals indicating its rotational speed and precise position during operation.
Accurate crankshaft position monitoring is essential for modern engine operation. The ECU needs exact information about the crankshaft position to optimise spark timing and fuel delivery. Without this critical data, the engine cannot determine when to fire the spark plugs or activate the fuel injectors.
A faulty crankshaft sensor may cause the engine to stall or, in some cases, prevent starting altogether, as the ECU cannot determine the crankshaft position. This makes the crankshaft position sensor an absolutely critical component.
Warning Signs Your Crankshaft or Crankshaft Position Sensor Need Attention
If your crankshaft or position sensor begins failing, several symptoms may appear. Watch for these warning signs:
- Unusual Noises or Vibration – Excessive engine vibration or strange noises might indicate physical crankshaft damage, requiring immediate professional assessment.
- Check Engine Light – A malfunctioning sensor frequently triggers the “Check Engine” light. This occurs because the ECU detects inconsistent or missing signals from the sensor.
- Engine Performance Issues – A failing sensor might cause engine misfiring, as the ECU cannot determine when to fire the spark plugs or activate fuel injectors correctly. You may notice rough idle, where your vehicle shakes or vibrates excessively when stationary. The engine might also deliver reduced power, resulting in sluggish acceleration.
- Temperature-Related Failures – High temperatures take their toll on the crankshaft sensor, sometimes causing intermittent problems, such as the engine stalling and only restarting after cooling down.
- Difficulty Starting – The crankshaft sensor tracks the crankshaft’s position and speed during engine startup. If it fails to transmit this data to the ECU, the engine may not start. When the engine is already running, you might not notice an issue regardless of whether the engine light appears, as the system estimates the crankshaft position based on previous data. Problems typically emerge only when you turn off the engine and attempt to restart it later.
Early detection is absolutely crucial! Identifying these symptoms promptly can be challenging, but recognising them early significantly increases your chances of preventing serious engine damage. Professional diagnosis is strongly recommended to confirm crankshaft or sensor issues before they lead to expensive repairs.
Maintain Your Crankshaft for Optimal Performance
Several important maintenance steps can keep your crankshaft in excellent condition, preventing damage, wear, or failure. Follow these essential practices to protect this critical component:
Professional Servicing:
- Never miss scheduled maintenance! During your service, our experts select and replace your oil, as described below.
- Regular inspections allow early detection of potential issues before they cause significant damage.
Regular Oil Changes:
- At Cheltenham & Gloucester Autocentre, we strictly follow your vehicle manufacturer’s guidelines on oil change intervals as part of your regular service, preventing premature wear.
- Fresh oil provides crucial lubrication, removes harmful contaminants, prevents corrosion, and dissipates heat effectively.
Quality Oil Selection:
- We use only manufacturer-recommended oil specifications at Cheltenham & Gloucester Autocentre.
- Premium synthetic oils deliver superior protection for your crankshaft and bearings.
- Incorrect oil specification can lead to premature wear with potentially catastrophic consequences.
Adhering to these maintenance practices will dramatically reduce the likelihood of unexpected breakdowns and costly engine repairs in the future.
Trust Our Expert Team
When it comes to crankshaft care, manufacturer-recommended maintenance schedules exist for good reason. We firmly believe prevention is always preferable to repair, and regular servicing is the key. As winners of Top Garage 2019 and Automechanika Garage of the Year, we’re the go-to local garage, proudly serving drivers across Cheltenham and Gloucester. Our approach at Cheltenham & Gloucester Autocentre has earned us a {{average-rating}} star Google rating from {{review-count}} satisfied customers.
With us you’ll get:
- Outstanding value and completely transparent pricing
- Specialised tools for all inspections and repairs
- Guaranteed use of manufacturer-specified or premium OEM replacement components
- A comprehensive 12-month parts and labour guarantee
(OEM stands for Original Equipment Manufacturer. When it comes to vehicle parts, this means the parts are made by the same company that produced the original parts for the vehicle manufacturer)
Our dedicated team consistently delivers exceptional service by prioritising your vehicle’s reliability, your safety on Cheltenham’s challenging roads, and your long-term peace of mind.
Don’t leave your engine’s health to chance. Ring us on 01452 855555 with any questions about your crankshaft, crankshaft position sensor or to schedule your next service. Our friendly experts are here to help keep you safely on the road.
