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Mark Howard
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911 HELP!!

Hey folks, I am a new 911 owner and am having my first crisis. My battery keeps heating up and boiling out the acid into my cargo area. A guy at the parts store said it sounds like a bad voltage regulator. Could be. Anyone have any knowledge of the problem. Also, if it is the voltage regulator, where the hell is it!! I looked in my Haynes manual (yeah, I bought one) but it doesn't correctly show the regulator location for a 1988 Carerra. Any thoughts?

Old 11-05-2000, 07:41 PM
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BRAINIAC2
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Your voltage regulator is located inside of the alternator and that is exactly what the problem sounds like. Either get another alt. or if you're mechanically inclined you can take apart your alt. and replace just the voltage regulator.
Old 11-05-2000, 07:52 PM
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old_skul
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Mark, you might also want to pick up a copy of the Bentley manual for your car. They make a very extensive manual for the 84-89 model years. It's served me much better than the Haynes manual, although the Haynes manual makes a nice paperweight/doorstop at times.

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Mark Szabo
1986 911 Targa 3.2
Old 11-06-2000, 06:23 AM
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Jim Smolka
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I would get the acid problem fixed ASAP. Be sure to neutralize the acid. I saw a 911 that had to have the front pan replaced due to acid from the battery. Not a fun job, or cheap either.

If possible, I would measure the voltage at the battery when the car is running above 2000 RPM w/o lights, radio, AC, etc. The voltage should be less than 15 VDC.

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Smoke Daddy
Old 11-06-2000, 01:36 PM
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Mrdi
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Had the same problem on my 88 a few monthes ago. Take care of it right away.Before you move the car again you might want to soak a rag in baking soda and put it over the battry so it doesn't spew all over. When finished replacing take out the battery and wash the area with baking soda solution, and flush some down the drain holes to clean out the acid that has leaked down on to your frame members.
Best of luck
Mrdi

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Old 11-06-2000, 05:36 PM
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jlex
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By all means, get the Bentley manual. Re the acid problem: after you've cleaned up the acid & fixed the voltage regulator, you may want to consider buying one of those acid neutralizing battery mats to place under the battery. I still can't believe Porsche didn't build their cars with a simple plastic tray to catch battery acid.... having it just sit on the floor of you unitized body car is one of the dumbest things I've seen on these cars!
regards,
jlex.
Old 11-07-2000, 04:15 AM
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Joeaksa
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Please go to Radio Shack (or any other electronics place) and get a digital VOM. Volt, Ohm Meter.

This will tell you what your alternator is putting out, and anything over 14.5 or so (plus/minus a bit) is too much.

Just had mine (85 911) overhauled as it was fine most of the time, then when on a long trip the regulator was going full tilt and putting out 16+ volts. Not good for the entire electrical system, not to mention the DME fuel computer.

Cost of the regulator was $38 and whole overhaul of the alternator (I handed it to the overhaul shop, took 45 minutes to pull out) was under $75 and done in a half day, with new bearings.

JoeA

Old 11-07-2000, 02:47 PM
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Joeaksa
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Please go to Radio Shack (or any other electronics place) and get a digital VOM. Volt, Ohm Meter.

This will tell you what your alternator is putting out, and anything over 14.5 or so (plus/minus a bit) is too much.

Just had mine (85 911) overhauled as it was fine most of the time, then when on a long trip the regulator was going full tilt and putting out 16+ volts. Not good for the entire electrical system, not to mention the DME fuel computer.

Cost of the regulator was $38 and whole overhaul of the alternator (I handed it to the overhaul shop, took 45 minutes to pull out) was under $75 and done in a half day, with new bearings.

JoeA


Old 11-07-2000, 02:49 PM
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