Question about 1999 Chevrolet Malibu

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Engine running hot after a new alternater was installed

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Although I CAN'T see how a new alternator would have anything to do with over heating except if it was the wrong one or incorrectly installed , the belt it rides on needs servicing(worn , to tight or too loose).
Maybe the wires on the back of the alternators are corroded not letting full B+ go to where its needed.
A visual inspection and a few simple test with a voltmeter should do the trick.

Posted on May 26, 2010

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SOURCE: engine running hot after thermostat installed

you have a bad water pump the water isnt circulationg as it should so you need to replace the water pump and soon before it causes damage

Posted on Jan 22, 2009

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SOURCE: I put a new alternater in and as soon as I start

check an see if you have a alt fuse blown it takes a little juice to the alt to make it put out juice what im saying is get a text light an see if you have power going to the alt its called an exiter wire you haft to exited the alt to get it started haha hope this helped

Posted on Dec 16, 2010

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2 Answers

Do I have a dying alternator or an electrical issue?


could still be alternater voltagt regalators are built in the alternater cause when you rev motor up ur alternater will put out little more volts your probly at low end of life on it.thats my that thought week alternater

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Check engine and battery lights are on after i changed both(battery and alternater) ...the car would run but the battery will be drained what's wrong wit my 96 eclipse


If you used a new or rebuild alternator, I'd suspect that the harness from the alternator to the battery is open circuit. It happens with age and corrosion. Measure the alternator terminal voltage, engine running. Should be about 13.7v. Same voltage should appear on the battery + terminal. If not, make up a heavy duty temp cable and run it from the alt to the battery.

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2002 isuzu rodeo 4 cyl twin electric radiator fans when cold turn igniton on fans run on high speed , it has a brand new battery and the alternater is checked ok it will not run hot and after it runs


Assuming the check engine light is not on, I would want to know what the engine temp sensor is doing.
A scanner would tell you what the temp sensor is showing - if it is unplugged or there is a problem with the wiring the fans will run as a default to prevent the engine from overheating. It could be a fan relay but I doubt it. A relay usually works or not.

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I am getting hold ligth on on my dash board,when i start the engine,the engine fuse break,i have change the alternator n check all the fuses,if i disconnect the wiring from the alternator the engine runs...


There might be a short between the alternater and ground.
Check wiring
Disconnect battery and alternater wiring from the back of the alternater and with a multimeter check for continuity between the BAT stud on the back and the alternater housing.There shouldn't be any.

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1 Answer

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the engine cools when the car is running
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1 Answer

I put a new alternater in and as soon as I start it up the alternater fails. Alternater is installed properly and belt is installed properly but still fails. 84 toyota pickup 22r engine


check an see if you have a alt fuse blown it takes a little juice to the alt to make it put out juice what im saying is get a text light an see if you have power going to the alt its called an exiter wire you haft to exited the alt to get it started haha hope this helped

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1 Answer

Alternator is very hot and car is not running


There is a SHORT in the Alternater, This HEAT is Caused By RESISTANCE and Without the Engine even Running It Being HOT INDICATES An INTERNAL FAILURE. Remove the ALTERNATER Have it BENCH TESTED and Replace Alternater to Correct this Problem.I am Confident this is the problem.

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1 Answer

Alternater is nocking i think its goin out or just might need to


Alternator knocking ????is the alternator light on is it charging as is almost impossible to get a knocking out of a alternator and it still charge at the same time.
Start engine ind get a small plastic tube and put it on the alternator and put your ear to it and you should hear the noise real bad.
And you should feel it getting real hot after run for 3 minutes if not its not ALTERNATOR

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1 Answer

New Alternater will not charge batery


When you touch the hot wire to the manifold you may have damaged your alternator. Take your Blazer to your local car service center such as Advance auto and have them run a test to make sure your rebuilt alternator is charging. Most centers will do this free of charge.

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