Bobtaylor Posted March 2, 2021 Report Share Posted March 2, 2021 HI, I have a MK1 2L Vitesse, when I drive the car after it has been left for a while the speedo under reads by quite a lot, affect a few miles it "wakes up" and reads correctly. If I then stop and turn off and then restart it works fine. Any ideas please? Bob Link to comment Share on other sites More sharing options...
johny Posted March 2, 2021 Report Share Posted March 2, 2021 I think thats most likely to be lack of lubrication and/or wear of the speedo internals. Ive got mine apart at the moment and with a delicate touch and good lens its surprisingly simple to clean and oil. If it is worn dismantling further might be best left to the professionals and anyway it would probably need replacement parts... Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 2, 2021 Report Share Posted March 2, 2021 yes the lube dries out , its common small droplets of engine oil is ok to seep into the main shaft some use a thick sticky grease on the needle spindle bearings to damp the needle this is where the slow is happening if you start to strip it mark the alloy disc relative to the needle if the hair spring has some wind up you need to know where just pulling the needle off can cause chaos with the calibration so best leave that part alone a flush with petrol brake cleaner etc will make a fair cleaner in small drips not floods pete Link to comment Share on other sites More sharing options...
Bobtaylor Posted March 2, 2021 Author Report Share Posted March 2, 2021 Can you explain what needs to be dismantled to gain access for lube. cheers Bob Link to comment Share on other sites More sharing options...
johny Posted March 2, 2021 Report Share Posted March 2, 2021 Remove the unit from the dash, prise back the tabs on the chrome bezel so that it along with the glass can be removed, undo the two fixing screws at the back of the casing and drop the internals out. This is as far as Ive needed to go to clean and lubricate using a fine paint brush and WD40. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted March 2, 2021 Report Share Posted March 2, 2021 1 hour ago, Pete Lewis said: a flush with petrol brake cleaner etc will make a fair cleaner in small drips not floods Keep it away from the face, the letters and numerals disappear with amazing alacrity. Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 2, 2021 Report Share Posted March 2, 2021 yes valid point getting the rim off and the degraded 0 ring from gripping the glass is good fun Pete Link to comment Share on other sites More sharing options...
johny Posted March 2, 2021 Report Share Posted March 2, 2021 Wouldnt risk a solvent based cleaner and yes definitely need a set of new seals (just ordered complete set of 10 of ebay for 9.25 delivered which I hope are going to be alright)... Link to comment Share on other sites More sharing options...
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