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re: 87 245 auto - voltage regulator & true mileage 200 1987

Hi All

I would love to find out the true mileage on my Volvo. Can you tell my looking at my voltage regulator brushes? You might need to zoom out... Thank you.

Short one/outside; 3.5mm
Long one/inside; 6mm


http://www.brickboard.com/IMAGELIB/volvopic.htm?js_link=&id=10572








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    re: 87 245 auto - voltage regulator & true mileage 200 1981

    Would a carfax tell?








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      re: 87 245 auto - voltage regulator & true mileage or "IS' a Car Fax 200 1981

      Do not believe Car Fax. The reason why is in the details of their commercials.
      You have to listen carefully as they say, "When reported" to Car Fax.

      Many shops do not participate or upon request on the car owner, will not. Tow trucks take down the mileage no matter what! Mostly for their protection and the tows covered by insurance companies. So who runs and has a reason for a Car Fax company? Regular consumers are just gravy in the dinner bowl.

      A non-insurance (self-done) or cash repair buys lots of silence. Quite a few people do not want their insurance company to find when the oil was changed. As it snitches off how many miles, they drive per year. No body repairs claimed covers up those self-inflicted accidents too.

      Here is a story or scenario!
      In addition, odometers fail, as we know. This is my second one around the 200k mark.

      I had just replaced one on my car at 210k about fifteen years ago with one from a Junk Yard that showed 97k. I ran that second odometer up to 160k then the wife had the car on a long trip with her sister. Then the valve covers rear oil seal popped loose. She took it in to a Volvo dealer and had it repaired at a reasonable price I might add. So IF, Car Fax got the odometer reading of 160k it is short about 100k and that was ten years ago!

      Now the same second speedometer has quit at 207k so if I take away original 97k then add the original 210k plus two 1,800 trips since then with out a working odometer then were is that Car Fax now?

      It might say the car two owners up to ’88 with 30k because I do all the work on my cars. If picking up a ten-year-old report that was behind and is way behind now!

      IMHO, if a car is older in twice the number of years you can lease a car for, car faxes are a waste of your money. Blue book starts dropping the cars soon after as they soon lose any real value to dealers and insurance companies whom rig the whole game anyway! Car Fax is their tool, for their “valued use” in reality.
      Phil








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    re: 87 245 auto - voltage regulator & true mileage 200 1987

    Just replaced mine as they looked just like yours. Vehicle has 250k miles and I've had it for the last 100k .. might have been original but who knows?








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      re: 87 245 auto - voltage regulator & true mileage 200 1987

      Hi Dan and Jac

      I am the third owner. The second owner purchased at 136k miles, owned for three years and had three Virgina vehicle inspections with the exact same mileage every year. I bought it last year at 136k miles, replaced the voltage regulator few weeks ago. My odometer indicates little more than 170k miles. My odometer works fine as long as I do not reset the trip button. I learn not to press it.

      So my question to you is...

      What's the average life/product span on this voltage regulator?








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        re: 87 245 auto - voltage regulator & true mileage 200 1987

        Here is some food to fill in the thoughts that caused your good questions.

        On the original alternator the brushes will last longer as the rotors slip rings are nice and smooth and have not suffered as much contamination from road grime.

        After the first change out it depends if the brushes used have some copper mixed in them or are straight carbon. Copper mixed in are like the originals and some rebuilders cheap out and use only the softer pure carbon. Some almost look like pure graphite used to lube locks. I have seen these come in a regulator from inside a Bosch brand “boxed alternator rebuild” recently and priced at over 125 bucks. Therefore, buyers beware!

        This said, I would guess in either case, 60 to 80k should be a reasonably good time interval that I use for checking the brushes. Some original alternators can go 100k or more because of the lack of dirt and loads place upon the alternator.

        The regulator itself will last for many brush set change outs.

        The things that can ruin a regulator are the short brushes as they will arc to the slip rings and the regulation is unstable. If the slip rings wear badly then the brushes cannot stay seated and will bounce that will cause the same problem. Rebuilders probably think that bad slips rings are almost as bad as getting bad windings in either the rotor or stator. That is when they “cut” their losses and salvage the copper.

        The next thing is of course a bad jump with jumper cables. Diodes can fail for the same reason or just fail period, which can harm a regulator. Bad grounds from the alternator or battery cables can overwork the regulator but in general, I find them rather resilient.

        I would bet most exchanged alternators have nothing more wrong with them but a couple bucks in brushes. The rebuilders love that deal, not that it that expensive for them to replace components anyway. Money goes to the labor to clean, test and package them.

        Now that you know this, I think you will have to agree that you probably cannot use an alternator as an odometer.

        Seat cushions, foot pedals, motor mounts and master cylinders or their boosters might be better for high mileage.

        Phil








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          re: 87 245 auto - voltage regulator & true mileage 200 1987

          your mileage on the brushes May vary!!!

          I've got an '87. a couple of years ago with the original Alt.
          I did a timing belt/front seals/ major tune...include alt bearings, regulator, bushings....

          30K later I died on the highway...one of the brushes got so short it came out of the holder. stranded....how I fixed it involved a very friendly ex-biker who drove me to a junkyard that was full of old Volvos, where I snagged a used regulator for $10.....this was on a Sunday afternoon ....another story though.

          Most of those miles were on the HiWay 65 to 75mph








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            re: 87 245 auto - voltage regulator & true mileage 200 1987

            Hi CB - Ok, I will save my old part for back up and check my regulator time to time. Thank you.

            Hi Phil - I don't know why but I just can't get over it. When I did upholstery on both front seats, they were very clean with minimal cracks on all seat cushions. My pedals are in good condition. And I threw out my old passenger side motor mount. The mount wasn't cracked but it was swollen like a gummy bear in water. I kept my old master cylinder. Old fluid leaked out over the years, there are rust spots and leaks under the brake fluid reservoir tank. I know I just need to get over it...








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    re: 87 245 auto - voltage regulator & true mileage 200 1987

    Huh? These things wear out and are replaced, and whole alternators get replaced over the life of old Volvos. It would be like trying to determine age by tire wear...







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