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E24 (1976 - 1989)
The BMW 6 Series (E24) was the first variant of the 6 series produced by BMW from 1976 through 1989.

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  #1  
Old 11-26-2011, 11:27 AM
casscounty casscounty is offline
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Mein Auto: 1982 633CSi
Speedo troubles

The speedo in my 82 633 is off, when I am going 75, it only shows about 68. Anybody have any thoughts on correcting this?
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  #2  
Old 11-27-2011, 05:49 AM
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PETER NEWMAN PETER NEWMAN is offline
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Smile Speedo

Do you have replacement road wheels and tyres which do not have the same rolling radius as the originals, This will put your speedo out.
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Old 11-27-2011, 06:42 AM
norseman1867 norseman1867 is offline
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I have a speedo rebuilt 65K ago that will fit your car. $35 +shipping. PM me if interested.
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Old 11-27-2011, 10:24 AM
casscounty casscounty is offline
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I do have a set of non-stock sized wheels and tires, but they only add 1/2" in circumference which translates to 60.3 MPH when showing 60. As far as replacing the speedo, I'd rather not as the car has only 29,000 miles and don't want to do anything that would call that in to question.
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  #5  
Old 11-27-2011, 01:35 PM
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PETER NEWMAN PETER NEWMAN is offline
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Smile Speedo fault

Then I feel the only option is to replace the road speed sensor in the differential, they are not expensive and very easy to replace so please try this before you do anything else, Peter.
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  #6  
Old 11-27-2011, 02:23 PM
casscounty casscounty is offline
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Thanks Peter, I will look in to it.
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  #7  
Old 11-30-2011, 09:36 AM
Bert Poliakoff Bert Poliakoff is offline
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Quote:
Originally Posted by PETER NEWMAN View Post
Then I feel the only option is to replace the road speed sensor in the differential, they are not expensive and very easy to replace so please try this before you do anything else, Peter.
An 82, depending on month of manufacture, should not have a diif sensor for the speedo, but rather, the speedo is driven by mechanical cable from the trans. The cable may need simple lubinjg or replacement. If not pull your speedo and have a speedo repair facility go through it and set it to the existing mileage. I bet it is nothing more than a simple calibration if it is not the cable.
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Old 11-30-2011, 06:58 PM
casscounty casscounty is offline
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Thanks Bert, I have been checking all over online and have not been able to find a speed sensor for the diff. I will check out the cable as soon as I get a chance.
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Old 11-30-2011, 07:25 PM
Bert Poliakoff Bert Poliakoff is offline
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It's real simple. get under the car and see if there is a cable coming out of the bottom of the trans. Check out speedometer gears.com. Jeff is a totally neat guy and may rebuild it for you, but his main cup of tea is making speedo gears. North Hollywood Speedometer or Palo Alto Speedometer are very high quality rebuilds.
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  #10  
Old 11-30-2011, 08:02 PM
casscounty casscounty is offline
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Thank you.
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