peterb wrote:
danny_ wrote:
peterb wrote:
danny_ wrote:
My speedo!
doing 20km/h speedo is fluttering from 110 km/h to the fuel gauge... the speedo looks like one of the newer ones too.
Sometimes the seal in speedo drive at gearbox leaks and cable 'pumps' oil up outer and into speedo head, gunking it up. Tell tale is oilyness around back of speedo.
I am finding quite a bit of oil.. well mostly grease type stuff on the cable but not on the back of the speedo its self.
How hard is it to change the seal?
The car is at the mechanics atm but he reckons the speedo needs to be re calibrated, I will ask him to check the speedo drive seal tomorrow.
you can get the drive out in situ, bit of a fiddle. tiny seal in fitting where cable goes on box. You could try cleaning "insides' of speedo using contact cleaner or the like. What sort of speedo is it? Old centre one or leyland 'front of driver'? You can take them apart, to very carefully clean.
Note when you buy a new speedo cable these days they are usually bone dry inside, and sometimes come with free rust.There is no seal in the speedo head.
Recommended practice has always been to grease the inner cable (preferably with molygrease) before fitting, but leave the top 150mm dry.
If you grease the whole thing, grease often ends up in the speedo head causing symptoms as described.
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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
