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| Speedo gremlin https://www.ausmini.com/forums/viewtopic.php?f=2&t=56825 |
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| Author: | BBY755 [ Mon Sep 07, 2009 9:31 pm ] |
| Post subject: | Speedo gremlin |
G'day all, Well, we're having a little problem with a speedo on a Cooper S.... Cable new and greased, when fitted to speedo and a drill at the bottom of the cable, the speedo is perfect - needle so smooth. Pity it doesn't move when the car does! Renewed drive spindle, and refitted correctly. Tried to turn from the top of the speedo cable and it won't turn...cool. Tried it by driving - nothing..... So, finally got to the metal gear drive spindle from the oval plate (engine in car) and it is locked in perfectly when pushed in - can't turn it. When you put the plastic spindle in the top, it meshes perfectly, and seems perfect.... So, what the FH could be the problem? Any theories or practical advice gladly received. |
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| Author: | simon k [ Mon Sep 07, 2009 10:24 pm ] |
| Post subject: | |
take the cable off the speedo and push the inner cable down, put the car out of gear, jack up one wheel and turn it by hand, the cable should turn I think I've heard that the inners are sometimes too short to engage at both ends |
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| Author: | BBY755 [ Mon Sep 07, 2009 10:35 pm ] |
| Post subject: | |
Mmm, The car is question is up on ramps with the engine jacked up to support it as the engine mount is off. The metal spindle looks fine, but is it possible that the thread is slightly worn and not engaging properly? I noticed that the old plastic threaded spindle has the threads the OPPOSITE way to the new one (which is correct by the photos on the forum) The plastic had cuts into it where the steel thread has eaten into it, but with the new plastic threaded one, it should work perfectly..... We don't want to put it back together till sure - if the spindle needs replacing, might be engine out job I reckon....... |
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| Author: | simon k [ Mon Sep 07, 2009 10:56 pm ] |
| Post subject: | |
don't you wish you had small hands..... |
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| Author: | BBY755 [ Mon Sep 07, 2009 11:08 pm ] |
| Post subject: | |
Yep, or factory trained children! |
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| Author: | BALLISTIC [ Mon Sep 07, 2009 11:15 pm ] |
| Post subject: | |
Its more than likely that the drive the cable slides into has rounded so the cable wont engage the speedo drive and therefore wont operate the speedo as it should, or it is also possible that the speedo drive shaft has stripped the centre teeth out of the nylon gear.....in any case you will need to remove the speedo drive from the gear box....there is only a 7/16 bolt holding the forked clap and housing to the gearbox.....anyways have fun and I hope this info is helpful to you. |
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| Author: | Fat Boy Dave [ Mon Sep 07, 2009 11:16 pm ] |
| Post subject: | |
I had similar symptoms as you describe. I was unable to get the cable on the speedo and tried and swore and used mole grips to try and force it on  . I thought it was the cable so tried my old one (still no go  ). I then took the cable off the gearbox (1275 A+) and the plastic clip that was on there prevented the cable from correctly engaging the gear. P.O.S. plastic clip that must have cost all of 20c.
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| Author: | BBY755 [ Thu Sep 10, 2009 2:19 pm ] |
| Post subject: | |
OK..... Another angle to kill the gremlin..... Does the Cooper S have a "U clip" or "Spring U Plate" on the speedo drive hosing? Or is it only the English cars? Can't find it listed on any supplier's catalogue here in Oz (although it may exist) Point is, the car we're working on doesn't have one - the housing plate where the speedo cable screws onto just has the one bolt holding it on - no u shaped anything.... Thanks for your feedback on my original question. |
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| Author: | simon k [ Thu Sep 10, 2009 2:35 pm ] |
| Post subject: | |
I'd call it a "spring U plate" - it goes under the bolt, and half way around the threaded part of the speedo drive boss will see if I can get my arm under to take a photo! edit: got one! took me 8 shots to get the right spot, then it ended up blurry - drew a line around it for you 
however, I'd doubt if that is causing your problem, as it is only to stop the boss from flexing and presumably from breaking, I don't think having it missing would stop the speedo from working, you'd notice otherwise |
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| Author: | BBY755 [ Thu Sep 10, 2009 2:40 pm ] |
| Post subject: | |
Thanks Simon, Had someone mention to me that he had to loosen the bolt slightly (which held that plate) to get his speedo working...... I also didn't think it would make a difference, and only realized that he was talking about something which wasn't on the car with the problem..... |
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| Author: | simon k [ Thu Sep 10, 2009 2:46 pm ] |
| Post subject: | |
see photo above... loosening the bolt to make it work doesn't make sense
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| Author: | BBY755 [ Thu Sep 10, 2009 2:56 pm ] |
| Post subject: | |
Thanks, I agree, don't see how it would make it work by loosening, unless something wasn't right to start with.... Yep, can't see how not having one would affect the speedo..... just have to get the car rolling again and check it all out....... hopefully will get it sorted...... PS thanks for the photo - I REALLY know how much wriggling and wrestling it takes, believe me! |
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| Author: | simon k [ Thu Sep 10, 2009 3:10 pm ] |
| Post subject: | |
BBY755 wrote: PS thanks for the photo - I REALLY know how much wriggling and wrestling it takes, believe me!
with the car on the ground, in the unsealed carpark 
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| Author: | BBY755 [ Thu Sep 10, 2009 3:17 pm ] |
| Post subject: | |
Double thanks! Very happy it wasn't raining! |
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