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

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Starting problems after driving it for awhile.

Hi there. This could be a heat related issue, but without scan tool data there is no sure way to determine. I understand about cleaning the intake, but why was the MAF cleaned? A code check may lead us in...

Q: Interior light won't turn off

If one of the lights inside the vehicle is not turning off, then there is likely a short in the wiring or switch for that light. As wiring problems can sometimes be hard to diagnose or detect, I would recommend...

Q: why oil filter be replaced ?

This is a very good question that I wish more people would ask. The reason why you change the filter at the same time you change the oil is due to the fact that the filter has a "lifespan" just...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.