Since replacing a rubber timing belt is no longer a routine maintenance task, timing chains have become more common in automobile engines built since the 1990s.
In most types of piston engines, the camshaft or camshafts are mechanically connected to the crankshaft, which drives the camshaft (through a timing belt, timing chain, or gears) and actuates the intake and exhaust valves.
Well, in this reading, we’ll explore what timing chain is, its functions, parts, diagram, symptoms and replacement costs.
Let’s begin!
What is Timing Chain?
An internal engine part called a timing chain is mounted to control the crankshaft and camshaft rotations, which are crucial for powering the wheels. Engine cylinders generate power to run and drive the car thanks to the chain’s movement.
The engine’s intake and exhaust valves open and close in sync and it enables them to move at the precise times needed to let exhaust out of the engine and the right quantity of fuel enter.
The precise quantity of internal combustion needed to drive at the correct speed is produced by the method.
Improvements in technology have made it possible to produce timing belt substitutes that are more robust. The chains are getting lighter and quieter.
These are becoming more and more popular in all kinds of modern applications. Their function remains the same as timing belts, but they no longer need to be maintained on a regular basis or have their timing chain replaced.
Chains can convey large torque loads in a small container when used as a power transmission device. A timing chain maintains the pistons, air intake, and fuel injectors in sync in a second.
Related: What is Belt and Pulley? Their Diagram and Working
Functions
Below are the major functions of a timing chain:
- Timing synchronizes rotation of crankshaft and camshaft(s).
- It ensures proper timing.
- The car components allows valve opening and closing during cylinder firing.
- It is located inside engine, lubricated by engine oil.
- Lastly, it works every time engine is in used.
Part and Diagram
Symptoms of a Bad Timing Chain
The symptoms of a bad timing chain include:
- Inability to Start The Engine
- Check Engine Light
- Contaminated Engine Oil
- Misfiring Engine
- Rattling Sound on Starting The Engine or Idling
Inability to Start The Engine
This shows that the timing chain has finally broken. The car will not start, which may cause damage to other engine parts.
Check Engine Light
A malfunctioning timing chain will cause the check engine light to illuminate, just like any other malfunctioning engine part. It is an indication that you should get your car checked for underlying engine issues, which might include a damaged timing chain.
Contaminated Engine Oil
Finding metal fragments in the engine oil is another red flag. It is possible for broken metal components from a damaged timing chain to fall into the oil. Check the timing chain right away if you or your garage professional notice this issue.
Misfiring Engine
Engine valve opening and closing are timed by the timing chain, thus any damage might throw off the air-fuel ratio and cause a power outage. It manifests as a lack of acceleration and a jerking action.
Rattling Sound on Starting The Engine or Idling
Unusual rattling sounds when the engine is started or the brakes are applied are frequently detected in cars with a malfunctioning timing chain. When the engine motor is running, the loose or stretched timing chain causes it to shake and rattle as it rotates.
Timing Chain Replacement Cost
A timing chain replacement will cost you between $500 and $1500 depending on the vehicle and the complexity of the job, with the average cost is around $1,600 to $2,000. Other factors you should be considering include:
1. Vehicle Model: Different car models have varying levels of accessibility to the timing chain, which can impact labor costs.
2. Labor: Replacing a timing chain often requires significant disassembly of the engine, leading to higher labor charges.
3. Parts cost: While the chain itself might be relatively inexpensive, other components like tensioners and guides may need replacement as well, which may add to the cost.
Related: Difference Between Timing Belt And Timing Chain
Timing Chain Maintenance
Below are the maintenance tips of a timing chain:
- Professional Servicing:
- Replace Damaged Components:
- Tensioner Adjustment:
- Lubrication:
- Regular Inspection:
Professional Servicing:
It’s best to seek expert service for intricate maintenance jobs or if you are inexperienced with timing chain systems. Skilled technicians possess the knowledge and specialised equipment necessary to carry out exhaustive examinations, precise modifications, and replacements.
Keep in mind that maintaining your timing chain system properly is essential to maintaining its dependability and effectiveness.
You can extend the life of your timing chain and save expensive repairs by adhering to these recommendations and taking quick care of any problems.
Please be aware that the particular vehicle and engine configuration may affect the maintenance procedure. For precise maintenance recommendations specific to your vehicle, always refer to the handbook and get expert guidance.
Replace Damaged Components:
The timing chain system should be changed right away if any parts, including sprockets or guides, are worn out or broken beyond repairable limits. Chain instability, reduced performance, and possible engine damage can result from damaged parts.
Tensioner Adjustment:
Regularly check the timing chain’s tension. It could be essential to modify or replace the chain if it exhibits symptoms of excessive slack or tensioner-related issues. Maintaining the right timing and avoiding chain failure or skipping need proper tensioning.
Lubrication:
Verify that the timing chain system is properly lubricated. Observe the manufacturer’s instructions on the kind and frequency of lubricant usage. Proper lubrication extends the life of the chain and associated parts by lowering wear, noise, and friction.
Regular Inspection:
Check the timing chain system on a regular basis for wear, damage, or strange noises. Check for misalignment, too much slack in the chain, and loose or broken parts.
Potential problems can be found through visual examinations and by listening for odd noises made by the engine while it is operating.
FAQs
What does the timing chain do?
The timing chain is a part of a car engine that synchronises the rotation of the crankshaft and camshaft in the engine’s lower and higher portions. This allows the engine’s inlet and outflow valves to open and close at precisely predetermined intervals during each round of the engine.
How do you know if a timing chain needs changing?
You’ll notice signs of Wear, Engine misfires or unusual noises (like rattling or clattering).You’ll also notice Poor engine performance or rough idling, Check engine light illuminated and Chain Stretch. Over time, timing chains can stretch, which can affect engine timing.
Is a timing chain a serious problem?
Driving on a bad timing chain is not advisable, as it can lead to severe engine damage. The timing chain is crucial for synchronizing the engine’s crankshaft and camshaft, and if it fails, it can cause the pistons to collide with the valves, resulting in catastrophic engine failure.
How much does it cost to replace the timing chain?
you should expect to pay between $1,200 to $2,500 for a professional timing chain replacement at a repair shop. If you’re skilled and have the necessary equipment, doing it yourself could reduce the cost to around $500 to $900 for parts alone.
Can timing chain be repaired?
It is quite a complex repair or replacement process, although most of the time is taken up with accessing this part. However consider changing it