Skip the auto shop - Our mechanics make house calls

Q: Dealer says the serpentine drive belt tensioner is leaking. I say, they are full of it, and it is a scam job to replace it.

asked by on

I'd like to know if there is a way to check the drive belt tensioner (still mounted) to see if it is leaking hydraulic fluid or not? There is no noise, and the tensioner is not "wobbling". It appears to be fine.

Also, I have watched videos on online, and the question is, for a 2008 corolla (ninth generation) does the passenger side motor mount have to be temp. on-bolted, so that the long tensioner bolt is raised high enough for clearance of the body, in order to uninstall/reinstall?

My car has 100000 miles.
My car has an automatic transmission.

A: Hello. In order to tell if it is leaking yo...

Hello. In order to tell if it is leaking you really need to get under the vehicle to see the bottom side of the hydraulic cylinder of the tensioner. I have seen a lot of these that are a little wet but they still hold good tension. The bad part is that it can fail at any time and cause some more serious issues. If you need to replace it then yes, the engine will need to be raised as they did not build it with a short accessible bolt. If you are thinking of having the tensioner replaced, consider YourMechanic, as a certified mechanic can come to your home or office to replace the tensioner.

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

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: A piece of my engine fell out and now there's a hole in the side of the block 1991 Toyota MR2

Hello - it takes a lot of energy for a part to "fall out of the block". I can reliably suggest you will be needing a new engine. Unfortunately, engine replacement is not a service YourMechanic offers at this time....

Q: Brake calipers

Hopefully your mechanic bled your brakes after he replaced the calipers. If he did, you may want to find out if he greased the outside of the brake pads to stop the excessive noise. He also should have greased the...

Q: Hi - Knocking noise

Hello. If there is a knocking noise then it may have some bad fuel or it may be another failure like an internal engine problem or a bad sensor. I usually start the diagnostic process by scanning the computer for...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...