Question about 1989 Chevrolet G30

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Alternator not chargeing can i use wd40 to help

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First of all.. Check to see if ya have 12 volts going to the back of the alt. If so.. call your parts house and see if it has an external voltage regulator. If so, try a regulator..That was a tricky year when they had either internal and external voltage regulators. otherwise.. get a new alternator. sometimes, the volt gauge will cause a non-charge issue. You can straight wire the gauge to eliminate that.

Posted on Mar 08, 2009


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Why wont the battery charge

take battery out and take it to a auto parts store have it tested if its good then its an alternator problem sometimes its wire connections you can look up alternator to see what it looks like then go out and buy a can of wd40 and spray it on the electrical contacts you can reply me

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you got water in the ignition and the water blew out youre altinator .....sorry my friend spray wd40 or equivelant on wires and distributor cap take cap off blow out moistier . as for the altinator its junk the coolant water is not good for them

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It's best to relate symptoms to narrow things down. I assume you are still getting a dead battery when trying to start even after replacing the alternator and battery.
Get a volt meter. Harbor freight sells them ridiculously cheap (about $5). Measure the voltage at the battery terminals when the engine is running. If it is at least 13.5 volts to 15 volts then the alternator is charging correctly. If it is 12 volts then the alternator is not charging the battery.

If the alternator checks out ok, then check for things that could be draining the battery when the car is off. Usual suspect is the trunk light. Put your cell phone on video record into the trunk facing the light, then shut the trunk. If the light stays on, its because the switch in the latch mechanism is faulty. WD40 might make it work, or just pull the bulb. Also, check the glove box light the same way. Good luck...Chris

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Car wont start light are dim, car making clicking noise when trying to start and electric windows wont let up or down

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Hi, l have a 1991 MR2 MK2'' turbo with Ferrari 355 body kit. The car has been standing outside in the wet all winter, only being started up a few times. Now l have started the car and as usual she starts...

how do u know the alternator is charging correctly, u should read 14 volts at the battery when the cars running to know its charging. try wd40 on ur electrical connectors in the engine bay, this will drive any moisture out of the connectors and hopefully correct ur problem.

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1 Answer

I am attempting to change the alternator, Battery unhooked, wiring removed, belt off , but 1 bolt remains , alternator will not pivot , any hints

Alternator is aluminum, bolt is steel...oxidation from electrolysis happens there easily. Lots of wd40, some light hammering on bolt head and sometimes heat helps (unless you aren't careful and start a fire or melt something you need). Once the bolt moves a little, keep working it in both directions and moving it out further a small amount each time.
Once you have it out, clean it up well and use anti-seize compound on it when putting it back together.

Jan 23, 2010 | 2004 Chevrolet Silverado 2500HD

3 Answers

Can a alternator PULLEY make a chirping noise?

It's possible that the alternator is making the chirp noise (bearing) but I would try this first. Start the engine and allow the engine to idle and open the hood and take a spray can of WD40 and shoot a short burst onto the bottom side of the belt and pulley. Dont spray allot as this will cause the belt to slip. The WD40 is to lube the pulley grooves and belt a slight bit. Hope this works!


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1 Answer

Does the serpentine belt need somekind of lubricant?

Belt is getting hot, because it might be loose or one of the components (AC, water pump, alternator etc) has trouble with rotation (getting stuck). In most common case it is alternator.
If you are handy with that you need to remove the belt and rotate the alternator, water pump, ac pulleys and see which one has problem with rotation. Also you can check for free at Autozone if alternator giving enough charge.

Libricants are prohibited to use, belt will be slippering and wont rotate the pulleys for AC, water pump, alternator.

For tension serpentine belt can be checked by twisting it, it should not twist more then 90 degree, or by pushing, no more the 1/4 inch freedom then you push it
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