The timing belt is an indispensable engine part of your automobile.
If you own a Toyota and want to gain insights into this part, we will inform you of the Toyota Sienna timing belt or chain on various year models.
Let’s figure out this wonderful product in the following sections.
What Is A Timing Belt?
A timing belt is an engine that helps maintain the harmonious movement between a crankshaft and a camshaft.
In other words, thanks to this device, a crankshaft can work and operate in synchronization with a camshaft via a network of valleys and drive belts.
In addition, a timing belt also manages the water pump by moving car pistons toward the opposite directions within the cylinder engine bore.
Regarding its components, most modern products are made of a compound, including rubber and other synthetic substances.
This material is less susceptible to heat, oil, and harmful elements, which helps prolong the belt’s lifespan compared to its old models.
However, you still need to keep track of its condition closely and replace at the recommended intervals.
This is because when a timing belt breaks, pistons and exhaust valves are likely to be out of sync, colliding and consequently rendering catastrophic engine damage.
What Are The Pros And Cons Of A Timing Belt?
Of course, each product will have both positive and negative sides. So let’s figure them out:
Advantages
- Engine noises reduced to a minimum
- Low-frequency vibrations
- Secured velocity ratings
- Low chances of slippage
- The mechanical efficiency reaching up to roughly 98% but in the constantly maintained condition
- Less susceptible to rusting
- Excellent abrasion resistance
- Less likely to be affected by chemicals or contaminants
- Saving energy
- The accurate motion or registration
- The high torque’s capacity of carrying not lowered
- Virtually no signs of elongation or stretching
- No need to be lubricated for smooth operation
- Weight savings
- A variety of design options
- High safety ratings
- The economical benefits.
Indeed, you can save lots of money for engine lubrication in metal-to-metal contact and disposal fees.
Besides, it is also less inclined to wear, elongation or stretching, so the replacement cost will greatly reduce.
Drawbacks
- The transfer power is weak at short center distances
- It is still affected by humidity, engine oil, and grease
- The immobile chain links may cause great difficulty when it comes to the installation practice
- Excessive bearing loads
- A lack of sprocket or tooth wear
- Expensive repairs
Toyota Sienna Timing Belt Or Chain On 24 Models (From 1998 To 2021)
From 2007 onwards, new features of timing chains along with interference engines have been added to Toyota Sienna models.
Yet, in earlier models, an AV6 engine with timing belts was equipped, requiring replacement and non-interference motor parts.
Below is a thorough list of Toyota Sienna cars from 1998 to 2021 that you can consider:
2021 Toyota Sienna Timing Belt Or Chain
- Engine option: A25A-FXS 2.5L 4-Cyl Hybrid, 186 (gas only) hp / 243 (combined) hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2020 Toyota Sienna Timing Belt Or Chain
- Engine option: 2GR-FKS 3.5L V6 296 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2019 Toyota Sienna Timing Belt Or Chain
- Engine option: 2GR-FKS 3.5L V6 296 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2018 Toyota Sienna Timing Belt Or Chain
- Engine option: 2GR-FKS 3.5L V6 296 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2017 Toyota Sienna Timing Belt Or Chain
- Engine option: 2GR-FKS 3.5L V6 296 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2016 Toyota Sienna Timing Belt Or Chain
- Engine option: 2GR-FE 3.5L V6 266 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2015 Toyota Sienna Timing Belt Or Chain
- Engine option: 2GR-FE 3.5L V6 266 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2014 Toyota Sienna Timing Belt Or Chain
- Engine option: 2GR-FE 3.5L V6 266 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2013 Sienna Timing Belt Or Chain
- Engine option: 2GR-FE 3.5L V6 266 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2012 Sienna Timing Belt Or Chain
- Engine option: 1AR-FE 2.7L 4-Cyl 187 hp or 2GR-FE 3.5L V6 266 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2011 Sienna Timing Belt Or Chain
- Engine option: 1AR-FE 2.7L 4-Cyl 187 hp or 2GR-FE 3.5L V6 266 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2010 Sienna Timing Belt Or Chain
- Engine option: 2GR-FE 3.5L V6 266 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2009 Toyota Sienna Timing Belt Or Chain
- Engine option: 2GR-FE 3.5L V6 266 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2008 Toyota Sienna Timing Belt Or Chain
- Engine option: 2GR-FE 3.5L V6 266 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2007 Toyota Sienna Timing Belt Or Chain
- Engine option: 2GR-FE 3.5L V6 266 hp
- Belt or chain: Timing chain
- Interference or non-interference: interference
- Replacement interval: lifetime.
2006 Toyota Sienna Timing Belt Or Chain
- Engine option: 1MZ-FE 3.3L V6 230 hp
- Belt or chain: Timing belt
- Interference or non-interference: non-interference
- Replacement interval: 90k miles
2005 Toyota Sienna Timing Belt Or Chain
- Engine option: 1MZ-FE 3.3L V6 230 hp
- Belt or chain: Timing belt
- Interference or non-interference: non-interference
- Replacement interval: 90k miles
2004 Toyota Sienna Timing Belt Or Chain
- Engine option: 1MZ-FE 3.3L V6 230 hp
- Belt or chain: Timing belt
- Interference or non-interference: non-interference
- Replacement interval: 90k miles
2003 Toyota Sienna Timing Belt Or Chain
- Engine option: 1MZ-FE 3.3L V6 230 hp
- Belt or chain: Timing belt
- Interference or non-interference: non-interference
- Replacement interval: 90k miles
2002 Toyota Sienna Timing Belt Or Chain
- Engine option: 1MZ-FE 3.3L V6 230 hp
- Belt or chain: Timing belt
- Interference or non-interference: non-interference
- Replacement interval: 90k miles
2001 Toyota Sienna Timing Belt Or Chain
- Engine option: 1MZ-FE 3.3L V6 230 hp
- Belt or chain: Timing belt
- Interference or non-interference: non-interference
- Replacement interval: 90k miles
2000 Toyota Sienna Timing Belt Or Chain
- Engine option: 1MZ-FE 3.3L V6 230 hp
- Belt or chain: Timing belt
- Interference or non-interference: non-interference
- Replacement interval: 90k miles
1999 Toyota Sienna Timing Belt Or Chain
- Engine option: 1MZ-FE 3.3L V6 230 hp
- Belt or chain: Timing belt
- Interference or non-interference: non-interference
- Replacement interval: 90k miles
1998 Toyota Sienna Timing Belt Or Chain
- Engine option: 1MZ-FE 3.3L V6 230 hp
- Belt or chain: Timing belt
- Interference or non-interference: non-interference
- Replacement interval: 90k miles
What Are The Symptoms Of A Bad Timing Belt On Toyota Sienna?
Below are dire warnings indicating that your Toyota Sienna timing belt is out of order:
A Strange Noise Deriving From The Engine
As we have mentioned earlier, a timing belt is attached to several pulleys that help connect to a crankshaft.
This device controls the cylinder head and valves, which send fuel to the internal combustion engine.
For that reason, if a timing belt is defective, you may hear a loud clicking noise while driving, due to the lowered engine oil pressure stemming from the above process.
Your Automobile’s Engine Cannot Ignite Or Turn Over
When you turn the key but see no sign of your car turning over or rough idling, there is a likelihood that your timing belt is broken.
The reason is that it manages both the crankshaft and camshaft, which are in charge of engine ignition.
Besides, this can wreak havoc on the car cylinder (like wall damage), rocker arms, and rods as well since they are related to the operation of a timing belt.
Engine Oil Leakage Near Your Vehicle
Numerous nuts and bolts secure a timing belt cover. When they rust or loosen over time, an oil amount will leak from this motor part.
This problem also stems from a failed gasket connecting the engine block to timing cover.
Additionally, when your oil filter is on the fritz, the leakage issue is also induced, which denotes the engine overheating.
Exhaust Problems
When there is something wrong with a timing belt, other systems and motor parts have to work harder under duress. Your car will emit more exhaust gasses than it is supposed to as a consequence.
Your RPMs Act Abnormally
Some unusual signs of your RPMs (Revolutions per minute) are indicative of a faulty timing belt. Common issues could be enumerated, such as missing teeth or being slapped, etc.
Regardless of the problems’ seriousness levels, a negative effect on your automobile’s RPM meter is undeniable.
Timing Belt Appearance
Some changes to the engine timing belt’s look are also a usual symptom.
For instance, if cracks appear along your belt’s surface, your timing belt may be worn out. Another sign lies in the material fragmentation, causing its rough appearance.
Loss Of Tension
When this happens, the deflection force generated by your timing belt seems to reduce. Following is the slipping problem or the belt dropping during the operation.
And if you don’t solve it promptly, other issues, namely piston collusion or engine failures, will arise.
How Much Does It Cost To Replace A Timing Belt?
A timing belt only costs you between 20 and 50 dollars. But when you have it fixed by professional mechanics, the average cost can reach up to 1000 dollars, based on your car type.
For instance, electric vehicles may require fewer repair steps and little maintenance, thereby saving you a sum of money.
It is more economical to replace your old belt at home, but this practice poses more risks to your automobile. Hence, you are advised to take it to a reliable automotive shop for common repair.
The Bottom Line
After contemplating our article, we wish you could equip yourself with more essential and helpful information about the Toyota Sienna timing belt or chain.
For more inquiries, contact our website or comment below; our supporting team is invariably willing to help you.
Thank you, and have a nice day!