Odometer?

[Finn]

Right.

Got brand new set of studded Goodyear Ultragrip Ice Arctics under the car today and took her out for a spin. Trip took me to my trusty mechanic who takes care of all my cars.

We emptied cooling system, flushed it, put new thermostat in and 50/50 mix of coolant and distilled water and bled-filled-bled-filled-bled etc. - it was a straigh forward job and everything went easier than what I thought.



On my way home, 9.5 kilometres after this pic the odometer failed



Everything works but something is cut off as the reading is stuck at 169999 km. It tries to rotate the discs but fails - I hear a "snap" or two on the odometer when it tries to rotate.

Since I'm me I expect everything to work. The question is which car has same odometer where we could get necessary small parts to get this working. Or put another odometer unit in my set of instruments.

I have 5W30 in engine and that's the oil pressure reading at 80 km/h in 5th gear. We will out of curiosity measure the oil pressure with a proper gauge and compare with specifications.

Anyway, the main question is the odometer. Which Toyota could I use as donor?

[pk_090]

Does the speedo still work? as when my speedo cable snapped both the speedo and odometer failed to read.

[Finn]

Yes, speedo and tripmeter both work normally.

Resetting the tripmeter does not seem to have any effect on the odometer.

When the odometer tries to rotate to 170000 km it lets a quiet "snap" in highway speed as well as very slow speed and does not...er...advance (?). According to tripmeter the "snap" occurs after each kilometer ie. odometer works but some small bit of the discs is broken.

[Lauren]

A fiddly job but it can only be mechanical. Best thing would be to get another and swop over the damaged part. The odometer does all come apart but it is a bit tricky as the parts are small of course.

[PW@Woodsport]

Just replace the whole speedo unit, takes around 20 mins, trying to repair just the odometer will take you hours.

Not sure about Finland but here a replacement cluster is about £20.

[Finn]

More or less zero replacement units available here. The trusty mechanic has no problems in repairing this one as long as we would know which Corolla or such would have similar odometer small parts.

The UK spare units are MPH and mine is km/h. Would the small odometer parts interchange nevertheless?

[PW@Woodsport]

Don't know to be honest, not something i've ever done, dash units here are ten a penny so people just swap them.

What i can tell you is Toyota make the KMH/MPH change at the gearbox end on most cars with a different pitch on the diff cog, the clocks etc all seem to be the same but with different dials.

So i'd be willing to bet some MPH clocks will work exactly the same but with your KMH facia fitted.

[Finn]

Thanks, that sounds good.

Anyone care to point me to a reputable direction where I could get a spare unit in case I find nothing over here, please?

[PW@Woodsport]

I'll send you a speedo unit for postage costs.... just checked and £25 is the cost of posting to Finland.

[Finn]

That is a generous offer, thank you. I'll PM you the details.

[mk1 dal]

hi. it wont work , i have already tried it on my charger by fitting a mph facial clock to the original kph mechanism and it was miles out ( 19 ph miles out according to the sat nav ) and had to fit a mph mechanism and clocks to the dash cluster to get it to work . i do still have a fully working kph unit from the charger .

[PW@Woodsport]

Finn i've had a look at the EPC and it appears in the case of the MK1 NA (no idea about SC) the diff cogs were all identical part numbers, however the dash speedo unit has different part numbers for MPH and KPH.

The thing i do not know is wether that part number difference relates to the whole speedo unit being mechanically/electrically different between KPH and MPH or wether it is just the dial facia itself that is the only difference.

Basically you won't know until you try it, so i'm happy to either send you the MPH unit or refund your postage.

[Lauren]

I seriously doubt it's worth trying a mph unit.

Better just to get Km/h unit. Though Finn will want one that goes up to 240km/h though he could fit a JDM one that goes to 180 and it would work fine.

[PW@Woodsport]

It's worth trying if they are mechanically the same, then only the facia needs changing.

Finn has already said he cannot get a KPH unit.

If the only difference is the scale on the facia then it's his best option.

As above Finn i'm happy to send it or refund your postage, whatever you want.

[Finn]

As I mentioned above we can take the odometer thingy apart and try to swap the broken "disc" or what they are called. I would think that odometer small parts are the same between MPH and km/h units?

If you think that indeed is so then I would like to get the MPH unit, please.

This way we will have at least some parts to work with and also can use that MPH odometer to compare with Corolla parts at local breakers.

[PW@Woodsport]

Hi Finn, i only have the EPC part numbers to go from, and they are different from KPH to MPH complete speedo units, as above this difference may just be the dial facia itself, or they could be mechanically different.

My best bet would be most of the parts will be the same with maybe only an electronic difference somewhere, OR just the facia is different.

[Finn]

No worries, I'll take my chances.

[stenky]

I have a spare 240 kmh cluster just in case everything else fails there were also at least 2 european aw11s being broken nearby, so I might look for them to restock my supplies in case you'd take my odo

[Finn]

Thanks Stenky. Now we have a Plan B as well.

[Finn]

Right. 5 hours of trial and error, cursing big and stiff fingers, 50 year old eyesight and Mr Nippondenso who designed the gauge we finally got it back together and working. Woot!

Thanks to Paul I got an MPH gauge where I was hoping to be able to get some spares - which I did.

Side by side:



The MPH gauge has ratio 1026 rev = 1 mile whereas km/h gauge has ratio 637 rev = 1 kilometer. Ratio 1026:637 equals 1.609 which is one mile in kilometers which you all knew, of course.

Both speedos seem to have about the same scale but inside the gauge itself the ratio of odometer is different between mph and km/h.



This one disc on the right was the problem in my odometer. There are so many microscopic parts that I hope I never have to look inside the speedo again.



Paul, thanks again for the spare speedo.