Q: How much oil needs to leak into an Alternator to cause the Alternator to go bad

asked by on

I sent my car with my Mechanic Friday afternoon to fix brakes, change fan and computer. My mechanic said car would be done and returned Saturday morning. Saturday afternoon, he calls to tell me that I need a new battery and alternator. He said he drove it made several stops and Saturday morning took it to pick up parts. Upon returning to my car it would not start. He removed the battery took it home to charge and found battery and alternator needed to be replaced. Alternator had oil leakage in it. He replaced battery and alternator made several stops again and dropped my car off Sunday Evening. My husband drove the car Monday morning to drop my son off at work and upon returning home battery lights came on radio died and car died. He had to push car into parking stall. I called the mechanic and he came to diagnose the problem. Took the alternator, battery and its been a week. He now comes and says I now need a new battery, alternator and gasket valve.

My car has 100000 miles.
My car's transmission is unknown to me.

It would be difficult to say exactly how much oil it would take to cause the alternator to fail. However, oil leaking on the alternator due to leaking valve cover gaskets can cause it to fail. It seems as if the technician who is servicing your vehicle may not have performed a courtesy inspection to check for other potential issues prior to starting the other repairs you had requested. I would recommend having the alternator replaced if it has oil leaking on it as well as resolving the valve cover gasket leak to prevent it from happening again. You may try to use a different mechanic who is more upfront and honest in the first place. Consider YourMechanic as services such as this can be completed from your home or office.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. How much oil needs to leak into an Alternator to cause the Alternator to go bad

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 lot of smoke coming from the car. What's the issue?

Hi, thanks for writing in. If you have smoke being emitted from your vehicle, it is likely due to a fluid that is leaking and landing onto a hot surface such as the exhaust. Typically when smoke comes from under...

Q: crankshaft pulley bolt is bent and car will no longer start. prior to noticing car would make knocking sound

My best guess is that the crankshaft bolt worked loose and as it became more and more loose the front pulley and maybe the timing belt sprocket started knocking around. Once the bolt became loose enough that the front sprocket...

Q: Car loses power steering when turning in the rain

Hi there, thanks for writing in. The issues you're experiencing are commonly caused by an exposed wire that is shorting when introduced to moisture or ignition problems that temporarily shut down electrical power to important components. The power steering on...

Related articles

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...
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...