Eddie Posted February 25, 2015 Report Share Posted February 25, 2015 Simple question - should a Herald 13/60 have valve stem oil seals? My car burns a little oil on start-up. I have been advised by more than one person that this is due to oil running down the valve guides and can be cured by replacing the valve stem oil seals. However, my workshop manual says that the Herald engine does not have valve stem oil seals, although it does list "ineffective valve stem oil seals" as a possible cause of excessive oil consumption . Rimmers do not list valve stem oil seals for the Herald engine, but James Paddock do; "for use with single valve springs". Advice please? Link to comment Share on other sites More sharing options...
KevinR Posted February 26, 2015 Report Share Posted February 26, 2015 The engine used in a Herald does NOT use oil seals on the valve stems. The valve guides are not designed to take oil seals, and fitting oil seals can cause the valves to seize in the guides. Link to comment Share on other sites More sharing options...
Eddie Posted February 26, 2015 Author Report Share Posted February 26, 2015 Thanks. So is the oil burning on start up likely to be caused by leakage into the cylinders through the valve guides? And if so what is the solution? Replacing the valve guides? Link to comment Share on other sites More sharing options...
Darren Groves Posted February 27, 2015 Report Share Posted February 27, 2015 Thanks. So is the oil burning on start up likely to be caused by leakage into the cylinders through the valve guides? And if so what is the solution? Replacing the valve guides? Yes & Yes..... Whilst the head is off worth checking it has been converted to unleaded, if not get hardened valve seats fitted (exhaust only). Link to comment Share on other sites More sharing options...
Clive Posted February 27, 2015 Report Share Posted February 27, 2015 Of if it isn't using much oil or causing other issues, a little top-up every now and again. Don't get too hung up about oil use as long as it isn't excessive. Link to comment Share on other sites More sharing options...
68vitesse Posted February 27, 2015 Report Share Posted February 27, 2015 Oil is cheap enough, used to have a proper mini years ago which if driven fast would do about fifty miles to the pint. Engine in Vitesse used to do less than two hundred to the pint,not a problem with the mot, rebuilt it now does over a thousand. What sort of miles to the pint for your Herald?. Regards Paul Link to comment Share on other sites More sharing options...
Eddie Posted February 28, 2015 Author Report Share Posted February 28, 2015 According to my workshop manual I need a special tool to remove & re-fit the valve guides. Does anyone know where I can get one? Link to comment Share on other sites More sharing options...
KevinR Posted February 28, 2015 Report Share Posted February 28, 2015 Removal and refitting of the valve guides is probably best left to an experienced machine shop, who have the correct equipment to both replace the guides, and recut the valve seats concentric with the new guides. If the head hasn't been converted to unleaded, now is the time to do it, as re-cutting the valve seats after valve guide replacement will destroy any "lead memory" that you may be benefiting from at the moment. Link to comment Share on other sites More sharing options...
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