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Can a oil leak damage a alternator as to where it won't charge the battery?

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Yes.. If oil gets into the circuit board it can damage the diodes and circuit board. Oil can also carry other damaging minerals and debris into the Alternator.

Posted on Apr 18, 2017

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Battery light doesn't come on as car fades and cuts off. Oil leak possibly dripped inside alternator. Perhaps damage to alternator cause of it not charging battery?


a make of car, model and year would be good
post the details along with these details in your next post as posts are not linked
oil in an alternator Assuming that it has a vacuum pump attached as in diesel engine will stop the alternator from charging as the oil lifts the brushes off the slip rings
flush out will normally fix the alternator but the seal in the vacuum pump has to be replaced

Apr 18, 2017 | Cars & Trucks

5 Answers

Why won't my engine crank?


Does the battery have 12+ volts? Can you check the starter wire for system voltage while someone tries to crank? (With no help, extend wires so you can see your multimeter from the drivers seat) If those things check out fine, it's time to suspect the starter. If the battery is dead, it's "possible" the alternator has gone out. If you get it charged up good and started. You can watch battery voltage for a bit and make sure it's showing higher than it was when you got it to start. This indicates the alternator is charging. I would start there and see what your results are.

May 21, 2016 | Cars & Trucks

1 Answer

Why does the battery light and brake light flash on & off?


If it can be determined that the oil leak caused the alt. to fail prematurely it should be replaced at no cost to you.If it is obvious and there is alot of oil on the alt.I would file it under the warranty.

Jul 02, 2013 | 2007 Kia Sedona LX Minivan

1 Answer

Battery won't stay charged alternator is good. so what could be the cause?


check alternator wires for damage.your drive belt could be slipping.replace battery cables.check alternator fuse.code scan for pcm fault since it pcm controlled.

Oct 26, 2012 | 2006 Chevrolet Aveo LT

1 Answer

Why won't my new and tested alternator charge the


need to check the wiring and connections for short or damage from alt to the battery any corrosion need to remove and clean or roplace

May 14, 2012 | 1994 Cadillac DeVille

1 Answer

2004 toyota corolla charging light on in the dash won't go out battery and alternator are fine what is the problem


How old is the belt that turns the alternator? Any whining sounds as motor revs up and down? If your belt is old and frayed, it might not be fully turning the alternator pulley...Hope this helps.

Mar 16, 2012 | 1993 Toyota Corolla

1 Answer

The battery has tested fine, the alternator is fine. But it won't start or hold a charge.


REPLACE POSITIVE BATTERY CABLE.CHECK ALTERNATOR FUSE AND CHECK ALTERNATOR VOLTAGE REGULATOR WIRES FOR DAMAGE.HOOK VOLT METER TO BATTERY FEED WIRE MAKE SURE 12 VOLTS GETTING TO ALTERNATOR FEED WIRE TO ALTERNATOR POSITIVE HOOK UP IF NOT YOU HAVE BLOWED FUSE TO WIRE FEEDING ALTERNATOR COULD HAVE FAULTY BATTERY POSITIVE CABLE OR CABLES CORRODED NEED CLEANING.

Aug 27, 2011 | 2005 Ford Ranger

1 Answer

Changed alternator,battery and still won't keep battery charged


CHECK ALTERNATOR 175 AMP MEGA FUSE. AND CHECK ALTERNATOR 20 AMP INLINE FUSE.IF FUSES OKAY.REPLACE BATTERY CABLES AND CHECK ALTERNATOR BATTERY FEED WIRE AND VOLTAGE REGULATOR WIRES FOR DAMAGE.AND CHECK DRIVE TENSION.MAKE SURE DRIVE BELT NOT DAMAGE OR SLIPPING.

May 30, 2011 | 2003 Ford Expedition

1 Answer

Just fixed the valve covers and now the car wont stay crunk up


battery is probably low.when trying cranking for a period of time battery get weak thats why battery light on.charge battery.to see if it hold a charge.when battery fully charged it should be 12.5 volts.with engine running alternator out put should be 13.5 to 14.5.if not replace the alternator.or have it tested.when replacing valve covers make sure your pvc valve.in valve cover in place if not your car will stall out and idle rough.your oil leak on inside of your car from a leaking oil line to oil pressure gauge.thats why your oil light is on.

Jun 21, 2009 | 1997 Mazda Millenia

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