How would i know when its time to replace the timing chain?

how would i be able to tell if the timing chain needs to be replace? would it make a sound when i crank the car up will a light appear on the dashboard
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
Typically, the timing chain is not replaced unless there is an issue such as a chain failure or the chain stretching. When the chain fatigues and stretches, there will be increased noise both during starting and while the engine is running as you will be able to hear the slack in the chain and there may be fault codes stored in the engine control computer when the sensors show a change in the mechanical timing. There is no standard for replacing the timing chain, but as long as you maintain the engine on a regular basis, you can extended the life of the timing chain.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Some automakers recommend changing a timing belt between 60,000 and 100,000, others don`t. Many of today`s timing belts can go 100,000 miles or more without needing to be replaced.
A timing belt is made of rubber and will need to be replaced at least every 100,000 miles. A timing chain is made of metal and is designed to last the entire lifetime of your Nissan.
A broken timing chain will cause an engine to not start or fail while driving. If the belt is already broken, the engine won`t have enough compression to start. If it breaks or jumps while driving, the pistons will be damaged from contact with the valves. The valves themselves will bend and potentially ruin the engine.
No timing belt will give an increase in performance – it`s just not possible. Its main job is to keep the timing in check. Having your timing belt replaced and noticing an increase in performance is just a mix of the engine operating at peak efficiency and a good hit of placebo effect thrown in for good measure!
The average cost for a Nissan Murano Timing Chain Tensioner Replacement is between $1,838 and $2,189. Labor costs are estimated between $1,238 and $1,562 while parts are priced between $600 and $627.
There is a rattling sound. A lax timing chain, or worse, a broken timing chain with loose parts within the engine, will produce a rattling sound when your car is idling. This rattling sound is typically most prominent while the engine heats up and disappears after some time.
Signs Your Ignition Timing Is Off

Some things to look out for: Engine knocking: Engine knocking occurs when the air-fuel mixture is ignited too soon in the cylinder. The mixture then pushes against pistons that are still trying to compress the mixture. This causes loud pinging sounds to come from the engine.

You need to look out for signs and symptoms of a weakening timing belt so that you can take action before it is too late. These include loud clicking sounds coming from your engine, squealing sounds, and your engine failing to start at all.
Overall, it should take a qualified mechanic between 5 and 8 hours to replace the timing chain and all of the parts that go with it.
Driving with a bad timing chain could give you serious engine damage, and it`s also dangerous because it could cause your vehicle to stop suddenly without warning. A timing chain typically requires replacement anywhere from 40,000 to 150,000 miles.
There is a rattling sound. A lax timing chain, or worse, a broken timing chain with loose parts within the engine, will produce a rattling sound when your car is idling. This rattling sound is typically most prominent while the engine heats up and disappears after some time.
Replacing The Timing Chain

You`ll have to bite the bullet and pay around $400 and $1,000 for installing a new one. Even though it`s costly, it`s better than the DIY-style option due to the risks and exhausting difficulty. However, if you come to the auto shop too late, you might have to replace the whole engine.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Replacing timing chain 2004 Mazda 6
ANSWER : Hello – if the mechanic waited until the car was re-assembled after the water pump job to suggest timing chain repair, then "yes", s/he was not doing you any favor. Doing the timing chain repair separately is essentially repeating the labor. There are a number of related parts involved in a timing chain service: the timing chain itself, one or more timing chain guides, a tensioner, an idler puller(sometimes), and various o-rings and seals. Many parts manufacturers package these as a "kit", and the technician simply orders the correct kit for your engine in order to be sure they get all the right bits. I recommend a timing chain service performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

Timing chain positioning
ANSWER : This system is a bit complex. I can give you some instructions, but I highly recommend getting a hold of a repair manual or purchasing a yearly subscription for just your vehicle from AllData. It is only $25 for a years subscription from AllData.

There are two separate sets of marks on this system. One set is for aligning the timing chain to the camshaft gears and the intermediate shaft gear. There will be marks on the chain that raps around the crankshaft gear as well. These marks will not line up after you turn the motor over.The other marks are on the inside of the camshaft gears and align with the cylinder head parting line. If you were to draw a ling through the center of both camshaft gears, they should line up with that imaginary line.

The crankshaft key way should be aligned with the mating face of the main bearing cap. You can confirm it is in the correct position by verifying the number one piston is at top dead center. If you have removed the balance shaft timing chain, these marks really need a visual diagram to understand where they should be aligned. Without a diagram I am not very confident it can be explained very clearly.

This may be difficult to to follow, so again I highly recommend purchasing a repair manual in digital form or a book. If you feel this is over your head, I recommend the following inspection to help you out. Timing chain replacement

Good luck! I hope I was able to help you.

How would i know when its time to replace the timing chain?
ANSWER : Typically, the timing chain is not replaced unless there is an issue such as a chain failure or the chain stretching. When the chain fatigues and stretches, there will be increased noise both during starting and while the engine is running as you will be able to hear the slack in the chain and there may be fault codes stored in the engine control computer when the sensors show a change in the mechanical timing. There is no standard for replacing the timing chain, but as long as you maintain the engine on a regular basis, you can extended the life of the timing chain.

Is it necessary to replace the timing chain during a ring replacement job?
ANSWER : In the course of performing the recall the timing chain needs to be removed in order to perform the service. The chain does not need to be replaced but does need to be removed. If the dealer will replace the chain and charge for the part only, then go for that. If they try and charge additional labor for the replacement chain, then ask why when it needs to be taken off when the job is performed. There should not be additional labor.

need a way to retain the timing chain
ANSWER : The best way to approach this unfortunately is by using a timing chain tool retainer/holder tool. You may consider having an expert from YourMechanic come to your home replace the timing chain.

HI, I’m considering a 2011 mini cooper s with 143k miles. Timing chain has not been replaced. What would cost be to replace when/
ANSWER : Hi, I will be glad to help you with this. The service that you are writing in about is offered by YourMechanic. You can obtain a written, itemized quote, and schedule the repair to suit your needs, by simply visiting YourMechanic’s timing chain replacement service page. Once on that page, click on "Get a Quote" and enter your vehicle information (year, make, model) and you will receive the quote instantly. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Timing Chain/Phasers Replacement on a 2005 F150 5.4
ANSWER : Hi there. I believe it would be a very good idea to have the guides replaced at the same time; especially if the mechanic completing this work will not charge a lot of additional labor to complete the service. Anytime you replace a timing chain, it’s best to replace all of the components inside an OEM kit. This reduces the potential of small issues causing additional problems.

My 2010 Chevrolet Equinox has a timing chain replaced and I was wondering if the timing gear was part of this.
ANSWER : Hello. If they replaced the timing chain to begin with then they should have also replace the timing chain gears and the tensioners at the same time. If they did not replace all of these parts when then installed the timing chain then they did not do a good job of repairing the vehicle. If the tensioners continue to fail due to a lack of oil pressure then there are other issues with the engine. It may have a failing oil pump. If you need some help with this engine, consider YourMechanic, as a certified mechanic can come to you to [diagnose why the tensioners keep failing] https://www.yourmechanic.com/services/timing-chain-replacement