Skip the auto shop - Our mechanics make house calls

Q: rattling sound in the engine

asked by on

rattling sound when car is put in gear. mechanic recommends replacing timing chain tensioner. how mych would it cost? tnx

My car has 1900000 miles.

Hello there; many faults will cause a knocking noise when your 2012 Toyota Sienna is put into gear. The timing chain tensioner is one of the many possibilities. Other possible faults would be the flexplate, belt tensioner, idler pulley, engine mounts or a misfire condition. If you need assistance, a certified YourMechanic technician can be dispatched to your location to inspect your vehicle’s rattling noise, and replace the timing chain tensioner if necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. rattling sound in the engine

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Water pump replacement

Yes. I would replace the tensioner at the same time since the only addition would be parts and there would be minimal labor added since you are already removing the water pump. The tensioner is most likely just as worn...

Q: I have a 98 Toyota 4Runner and my brother put the car battery on backwards and it like had an explosion when we jump start it

Hello. When this occurs it will blow several fuses in the fuse box, it can burn some fusible links, and it can even damage the computers. I usually check and replace the fuses first and then recheck it. If the...

Q: My car is juddering between 20 and 30 miles per hour And high revving after 40. Your issue or question fully describe your

What you are describing may be a result of a faulty speed sensor, potentially low transmission fluid or a even a faulty transmission control solenoid. As your vehicle travels down the road, the computer analyzes data being sent by vehicle...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...