Help with a constant humm when i turn car on from engine

Asked by Jul 02, 2012 at 12:12 PM about the 1986 Chevrolet Corvette Convertible

Question type: Maintenance & Repair

I have a 1986 vet, yesterday it started making a constant loud humm noise frm engine.  No warning lights came on, oil levels ok, could it be the alternator since my volts r running under 12. they r at 11.6 or could it be the water pump I know it is going bad but doesnt leak etc.?  Please help im a female and need to find a trust worthy source for repairs.

4 Answers

10,645

If your volts are under 12 then your system is not charging. Ideally they should be between 13.8 - 14.4. Now is the alternator the "humm" noise? Dunno. I would have the alternator checked to make sure it is not bad, and then go from there trying to locate the noise.Chances are it is the alternator though.

1 of 1 people found this helpful.
535

Your serpentine belt goes around the alternator, air compressor, power steering and your water pump. If any one of those components has a bad bearing, it could make a noise and cause the belt to slip or break. This in turn can cause the alternator to spin too slowly and not charge. However this is more unlikely as Michael suggested above, it is probably that the alternator is just not working but they usually don't make a humming noise. So you might have more than one problem.

2 of 2 people found this helpful.
1,065

i'd have to hear the hum but i had a hum under my hood that ended up being power steering, check ur fluid level on that....i went out and bought a bottle of Bar's Leaks for power steering and it said to help noise from the pump....poured that in and it hasnt made a sound in months

1 of 1 people found this helpful.

thank u all, it was the alternator

Your Answer

Corvette

Looking for a Used Corvette in your area?

CarGurus has 18,735 nationwide Corvette listings starting at $3,850.

ZIP:

Chevrolet Corvette Experts

  • #1
    John Carson
    Reputation
    2,460
  • #2
    Vincent Parker
    Reputation
    1,750
  • #3
    carGrrl
    Reputation
    1,470
View All

Related Models For Sale

Used Chevrolet Camaro
467 Great Deals out of 31,525 listings starting at $3,550
Used Ford Mustang
556 Great Deals out of 36,548 listings starting at $1,500
Used Porsche 911
148 Great Deals out of 5,057 listings starting at $11,990
Used Dodge Charger
356 Great Deals out of 30,281 listings starting at $2,000
Used BMW M3
24 Great Deals out of 2,113 listings starting at $6,599
Used Ford F-150
2,832 Great Deals out of 212,952 listings starting at $1,295

Used Cars For Sale

2018 Chevrolet Corvette For Sale
2,803 listings starting at $45,995
2017 Chevrolet Corvette For Sale
20 Great Deals out of 6,084 listings starting at $42,356
2016 Chevrolet Corvette For Sale
20 Great Deals out of 1,173 listings starting at $38,721
2015 Chevrolet Corvette For Sale
12 Great Deals out of 758 listings starting at $34,900
2014 Chevrolet Corvette For Sale
14 Great Deals out of 896 listings starting at $36,899

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.