Working on 91-93 164 instrument cluster odometers; etc.... - Alfa Romeo Bulletin Board & Forums

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post #1 of 28 (permalink) Old 08-02-2015, 04:52 PM Thread Starter
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Working on 91-93 164 instrument cluster odometers; etc....

Well, I tried to repair the trip odometers on two speedos today. turns out both had the same little gear broken that gears the red number 10th of a mile wheel to regular odometer 6 digit gears.

So ended up with original 202k speedo back in BB1 but still with dead trip odometer.

I did also reset the other 197K 6 digit odometer set to 000000 with bad trip odometer just to see if I could follow directions I was sent by fellow BBer. I could have set it to any mileage I wanted but chose to zero it out. Trip odometer no good on that one, too.

Guess that little gear is good for just about 200K.

I put zeroed out 000000 unit back into cluster with bad voltmeter. I robbed out all the good mini peanut bulbs from it too.

I ended up with three good clusters with all good bulbs but only two have working trip odometers. I test drove them all using BB1 as test mule.

I found out there are 19 screws - 11 longer and 8 shorter holding back white cover on cluster plus 4 more holding odometer set to cover. I marked all locations with L and S but you can force long screws into short screw holes without any ill effect it seems just takes littel extra twisting to get longer one to bottom out in original short holes.

I now have a spare 40K cluster and a spare 140k one with good trip odometers. I did not reset odometers on these as they came out of parts cars I had scrapped.
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Ciao, Alfisto Steve
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Daily drivers: USA models - 1991 164S Black Beauty II ALFISTO;

Daughter's current ride: BB1 my 164L and Her Granddads 2002 Ford Taurus is back up.

New parts hauler but not car hauler 2004 Jeep Grand Cherokee Overland 4.7L H.O. V-8

Needing TLC non-blackbeast the 93 164L

"A day without an Alfa whine is like a day without sunshine"

Last edited by Alfisto Steve; 08-02-2015 at 05:17 PM.
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post #2 of 28 (permalink) Old 08-02-2015, 05:08 PM Thread Starter
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More speedo pictures
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Ciao, Alfisto Steve
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Daily drivers: USA models - 1991 164S Black Beauty II ALFISTO;

Daughter's current ride: BB1 my 164L and Her Granddads 2002 Ford Taurus is back up.

New parts hauler but not car hauler 2004 Jeep Grand Cherokee Overland 4.7L H.O. V-8

Needing TLC non-blackbeast the 93 164L

"A day without an Alfa whine is like a day without sunshine"
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post #3 of 28 (permalink) Old 08-02-2015, 05:20 PM Thread Starter
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I swept up all the dead bugs (bulbs) after I got done with cluster testing.
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Ciao, Alfisto Steve
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Daily drivers: USA models - 1991 164S Black Beauty II ALFISTO;

Daughter's current ride: BB1 my 164L and Her Granddads 2002 Ford Taurus is back up.

New parts hauler but not car hauler 2004 Jeep Grand Cherokee Overland 4.7L H.O. V-8

Needing TLC non-blackbeast the 93 164L

"A day without an Alfa whine is like a day without sunshine"
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post #4 of 28 (permalink) Old 08-02-2015, 08:15 PM
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Could the broken pieces be repaired by wrapping with very thin wire?

John Stewart
74 Spider
91 164S
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post #5 of 28 (permalink) Old 08-03-2015, 05:02 AM Thread Starter
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Could the broken pieces be repaired by wrapping with very thin wire?
The little gear just crumbled into many pieces on first one I tried and second one couple teeth missing.

Since main odometer works, moving on to more important things.

Ciao, Alfisto Steve
Virginia Beach, VA
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Daily drivers: USA models - 1991 164S Black Beauty II ALFISTO;

Daughter's current ride: BB1 my 164L and Her Granddads 2002 Ford Taurus is back up.

New parts hauler but not car hauler 2004 Jeep Grand Cherokee Overland 4.7L H.O. V-8

Needing TLC non-blackbeast the 93 164L

"A day without an Alfa whine is like a day without sunshine"
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post #6 of 28 (permalink) Old 08-04-2015, 11:15 AM
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Great work Steve, I have replaced bulbs in these numerous times but never actually pulled one apart, is it possible to swap the digital speedometer from the 24 valve units into the 12 valve units?


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--------85 GTV6 V6 2.5---------86 90 V6 2.5---------90 75 V6 3.0 Potenziata-----------------90 164 V6 3.0------------91 164 V6 3.0 QV---------92 164 V6 3.0---------
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post #7 of 28 (permalink) Old 08-04-2015, 01:53 PM Thread Starter
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Great work Steve, I have replaced bulbs in these numerous times but never actually pulled one apart, is it possible to swap the digital speedometer from the 24 valve units into the 12 valve units?


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I have no idea, never been inside a 24v speedo cluster.

Ciao, Alfisto Steve
Virginia Beach, VA
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Daily drivers: USA models - 1991 164S Black Beauty II ALFISTO;

Daughter's current ride: BB1 my 164L and Her Granddads 2002 Ford Taurus is back up.

New parts hauler but not car hauler 2004 Jeep Grand Cherokee Overland 4.7L H.O. V-8

Needing TLC non-blackbeast the 93 164L

"A day without an Alfa whine is like a day without sunshine"
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post #8 of 28 (permalink) Old 08-04-2015, 08:15 PM
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More unchartered waters for us 😀


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--------85 GTV6 V6 2.5---------86 90 V6 2.5---------90 75 V6 3.0 Potenziata-----------------90 164 V6 3.0------------91 164 V6 3.0 QV---------92 164 V6 3.0---------
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post #9 of 28 (permalink) Old 09-17-2015, 02:24 PM
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some "artwork" i found in my photo archives:
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164 2.0 T.S 8V (5/1992, Euro spec.)
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post #10 of 28 (permalink) Old 10-03-2016, 08:19 PM
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Forgive me for waking up an ancient thread, but I've been google'ing a bit with very little luck. I have the exact same disintegrating gears as pictured above and a dead trip meter.
I emailed palo alto speedo but am not especially hopeful. Any other advice other than live with it? Is trying to find another used unit the waste of time I suspect it is?

91 164 5spd FS: http://www.alfabb.com/bb/forums/alfa-romeo-cars-sale-wanted/567521-1991-164-ok.html#post7463537
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post #11 of 28 (permalink) Old 10-03-2016, 08:31 PM
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Steve...I've got a bad tripodometer in my red car and would like to replace the whole cluster with a spare, but want to reset the mileage to what is showing on the existing odometer. How to I do that?

Red 1991 164S, Black 1991 164S, Red 1987 Milano, 1972 Berlina, 1973 Berlina rebuilding SPICA engine
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post #12 of 28 (permalink) Old 10-04-2016, 05:11 AM
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post #13 of 28 (permalink) Old 10-04-2016, 06:44 AM
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Yeah I checked all the usual suspects, have a request in with Nisonger Instruments :: the exclusive Smiths U.S. Warranty & Service Center since 1949 but I suspect it'll either be overly expensive or not possible.

91 164 5spd FS: http://www.alfabb.com/bb/forums/alfa-romeo-cars-sale-wanted/567521-1991-164-ok.html#post7463537
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post #14 of 28 (permalink) Old 10-04-2016, 07:20 AM
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Back when I was young, you could go to the FLAPS and buy a little stick-on manual trip odometer, and just reset it whenever fueling up or setting off on a trip or whatever. Wish somebody still made those!

Dave Spiegelthal, Centreville, VA
'91 164S, '79 Alfetta GT, '85 Fiat X1/9, '71 Fiat 850 Spider
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post #15 of 28 (permalink) Old 10-04-2016, 07:24 AM
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I could put an hour meter on it or something lol... Or somehow convince my significant other to actually note the mileage on fuel stops.
Guess I should be grateful the odometer works.

91 164 5spd FS: http://www.alfabb.com/bb/forums/alfa-romeo-cars-sale-wanted/567521-1991-164-ok.html#post7463537
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