Timing belts and timing chains do the same function in the engine of your vehicle. They linked the crankshaft and also the camshaft to ensure the they move in perfectly synchronous time. As the crankshaft spins and allows the pistons to rise and also fall in the cylinders, the crankshaft move at the same time many thanks to her timing belt or chain which allows the valves come open and close. In one interference engine, if the time belts were to break, climate the pistons would certainly crash into the valves in the cylinders and could potentially cause serious damage to your engine.

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If you journey a Lexus, opportunities are the is using a time chain rather than a timing belt. Numerous older models that Lexus vehicles used timing belts but that was generally pre-2005 or 2006. Because that time virtually every vehicle that Lexus makes has actually been outfitted through a timing chain rather than a timing belt. Depending on the design it might be a slightly later year once the switch was made however for the most component you have the right to expect that any modern-day Lexus is at this time using a timing chain. 


The Difference in between a timing Chain or a timing Belt


As we said, time chains and also timing belts carry out the same task in your engine. The main distinction is durability and also materials. The timing chain is really much favor a bicycle chain. It"s made of metal, it"s sturdy, and it"s very thick. A time belt look at like any rubber belts the you could find under the hood the your automobile such together a serpentine belt. It has teeth ~ above the inside that grip the gears ~ above the finish of the crankshaft and the camshaft so that it have the right to stay in place as lock rotate. Although that is often called a rubber belt, they are typically made native a composite material and also will include metal or even nylon object to assist strengthen the overall structure.


As sturdy as timing belts are, they space obviously no as strong as a timing chain. Time belts have actually a tendency to stretch the end over time, and they might wear under or break off also which can cause them come fail. For that reason, timing belts call for some program maintenance come make certain that they are still in good working order. ~ above an enlarge Lexus you"ll absolutely need to it is in doing this if the time belt is in location because, after ~ this many years, it"s very likely to begin wearing down. A good rule of thumb is to provide a time belt and also inspection every 30,000 miles or so, however they tend to it is in requiring replacement between 60,000 miles and 100,000 miles.


Timing chains used to be par because that the course and vehicles earlier in the day yet fell the end of favour in the late 70s and through the 80s since of cost-cutting measures. Time chains room made the metal and are technically meant to last the life of your vehicle. There"s no scheduled maintenance because that a time chain but that doesn"t mean they can"t fail together well. Mechanical failures, accidents, and other problems can result in the time chain failing eventually. There"s no way to setup for that though, however it never harms to provide a timing chain a visual inspection every as soon as in a while, as well.


Does A Lexus timing Chain ever before Need to be Replaced?


This is a tricky concern to answer due to the fact that it"s among those yes and also no thanks. As we said, a timing chain is intended to last the life of her engine yet what specifically does that mean? The life of her engine on document is not necessarily the life of the engine inside her actual car. What that means is the a time chain is designed come last for 200,000 come 250,000 miles or so without any kind of problems. However it"s possible that it might fail at the point. That means that yes, the time chain could fail top top you in ~ some point even though you"re quiet driving her Lexus and also it"s an otherwise good condition.


The trouble with timing chain failures is that they normally don"t have practically as many signs and also symptoms as a time belt does as soon as it fails. Together we said, a belt have the right to stretch out and also lose teeth, yet it is less likely to watch things prefer that and a time chain. The chain can end up being too stressed end time and also not fitting snugly, yet otherwise the usually provides very couple of visual signs prior to it breaks entirely. If you"ve been driving v the timing chain because that over 200,000 miles, it couldn"t hurt to have actually a mechanic provide it a look just in situation they could see noþeles wrong through it.


What walk it cost to change a Lexus timing Belt?


If you have an older model Lexus the still provides a time belt the price of getting it changed is walking to be anywhere between $600 and about $1,000. Timing belt repairs space not cheap on any type of vehicle however, for this reason this is not too far exterior of the normal selection that you can expect to pay for a timing belt repair. The high finish of the range is definitely much more than you can pay because that a Toyota Camry time belt instead of on an larger model, but component of the expense of having a Lexus is knowing that you"re going to be payment extra for regimen maintenance and also repairs together well.


In regards to timing chains, that might end increase costing quite a bit an ext especially if you need the timing tensioners replaced. These repairs could price anywhere indigenous $1,500 to as lot as $2,500 and also potentially even more.


Unfortunately, her Lexus just can"t operation without a time chain or a time belt therefore if you get to the allude where you need these repair done, castle absolutely need to be done. If your timing belt or timing chain begins to fail and also then ends up breaking on you the damage that it can reason to her engine will certainly be extreme. You can suffer catastrophic engine failure, specifically if you have actually a timing chain due to the fact that that reasons even much more damage. 


Signs and also Symptoms the a negative Timing Belt in my Lexus


When the timing belt falls short in her engine the can reason some serious damages over the long-term. Fortunately, there are a couple of signs front of time to let you recognize that a belt is failing. The method a time chain stops working is various from a timing belt, for this reason we"ll deal with that separately.


Ticking Noise


When the teeth start to wear down or loss off that a time belt you deserve to start producing an unexplained ticking sound as it spins between the camshaft and also the crankshaft. This is one of the faster warning indications that there"s a trouble with your timing belt and it have to stand apart from the common noises you"re provided to under the hood of her car.


Engine Misfires 


As we said, the time belt is responsible because that the precision time of your engine so as soon as it falls short that time is thrown off. If the crankshaft and also the camshaft aren"t relocating in synchronization, climate the pistons will certainly be climbing or falling as soon as the valves space not necessarily in the best position. The air-fuel mixture will also be injected in ~ the not correct time loved one to every this movement, and the ignition will certainly take place at the dorn time. When the time is thrown turn off enough, then the engine just will not fire in one or much more cylinders at the right time which outcomes in a misfire.


Oil Leaks


If the time belt covering on your timing belt begins to come loose oil approximately the bolts have the right to start leaking out. Girlfriend may recognize this oil clues in the driveway under wherein you park her vehicle, yet the oil can also Leak ~ above the time belt itself and cause it come wear out sooner than normal.

Rough Idling


When the timing belt has begun to wear down, your engine start to experience from some turbulent idling troubles as well. This will certainly manifest as some louder than regular noises and vibrations when you"re just sitting in your automobile with the engine running.


Check Engine Light


Unfortunately, a examine engine light isn"t extremely helpful in diagnosing any type of problems you may be having in your vehicle. However, if the examine engine irradiate does pop up on her dash along with a difficulty with your timing belt that has actually manifested as any of these other symptoms then it"s a good confirmation the you have to be obtaining your timing belt seen as soon as you can by a licensed mechanic.


If you want some additional confirmation you can always pick up your very own OBD2 scanner ~ above a site favor Amazon for just $30 to $40. Once you plug in the scanner come your automobile it can assist diagnose the inspect engine light and let you recognize if it really is a problem with the timing belt or miscellaneous else that you must take a look at at.


 Signs of a bad Timing Chain in mine Lexus


Although a timing belt is far more likely to stretch due to the fact that of exactly how it"s made, a timing chain have the right to suffer extending if it"s no from eating properly. Timing chains call for oil because that lubrication, and if that isn"t obtaining the best amount the oil or the oil is worn out, the chain deserve to suffer part wear and also damage. The rollers and links that save it relocating to grind against each other and also eventually cause the steel to distress. This distress will eventually cause the chain to shed its shape and also potentially slip from the gears.


 Metal Shavings


Just favor the rubber teeth can come turn off of a time belt, a timing chain have the right to grind down and drop metal shavings right into the oil pan. If you"re finding shavings when you execute a regimen oil change it"s feasible that they"re coming from your timing belt.




Not unlike the time belt failure, a timing chain failure can result in noises as well. Unlike the ticking sound produced by the belt, if the time chain is failing in her Lexus it will produce an ext of a rattling sound. This will certainly be specifically noticeable when you"re just idling in her vehicle.


 Engine Misfires


Much the same as the misfires the are resulted in by a timing belt failure, timing chain misfires space a result of the absence of synchronization in between your camshaft in her crankshaft. Due to the fact that the timing chain or the tensioners that keep it lined up space failing, the timing will certainly be thrown off and also you deserve to potentially experience a misfire


 The Bottom Line


As we"ve said, most contemporary Lexus models exploit a timing chain rather than a timing belt. If you have actually anything totally free 2005 come 2006 it very likely offers a time belt however the only means to know for certain without taking a visual inspection is to inspect out her owner"s manual. If girlfriend don"t have actually that handy, you have the right to Google the exact model and year of her Lexus to discover out even if it is or not you have actually a chain or a belt installed.

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Even despite both the time belt and also a timing chain perform the same project on her Lexus it"s crucial to recognize which one girlfriend have. If a time chain have the right to last a very long time and doesn"t need a most maintenance be on ensuring that you"re keeping your oil levels topped up and clean, the timing belt will need to be maintained and also inspected top top a relatively regular basis so you deserve to avoid any type of issues pertained to it break unexpectedly and causing some serious damage under the hood of her vehicle.


Given the a time chain or a time belt replaced in her Lexus has actually a an extremely costly fix job, however the expense of resolving the damages that will certainly be led to if the belt or the chain division is much, lot higher. For that reason, you desire to do everything you deserve to to make sure the time belt or the timing chain in her Lexus is in an excellent working order all the time.