Geoff Dixon Posted April 7, 2001 Share Posted April 7, 2001 Have just received some cam shaft oil seals from QED. Have got seals for both camshafts (ie 4 seals in total). Thought the seals were all the same except 2 are black and 2 are red. They appear to be the same size. However the QED invoice shows 2 front and 2 rear with different prices (£3.16 or £2.60 each). Does anyone know which are which - which are the rear seals and which are the front seals? Tried to ring QED today but they must be closed. Link to comment Share on other sites More sharing options...
andy oliver Posted April 7, 2001 Share Posted April 7, 2001 Have a very close look at them and you might find a tiny direction of rotation arrow-the ones on mine are only a couple of mm long and easily missed Link to comment Share on other sites More sharing options...
CHRIS CLARK Posted April 7, 2001 Share Posted April 7, 2001 Geoff. I assume these are for a 'K' although I guess they are all the same. The red/brown seal I have in my hand shows an arrow with a counter clockwise direction indicated ie. rear seal. Link to comment Share on other sites More sharing options...
Mike Bees Posted April 9, 2001 Share Posted April 9, 2001 Are they always directional? I'm sure the ones I've got from Roversport aren't - I've never considered that they were directional when fitting them... Mike Link to comment Share on other sites More sharing options...
oilyhands Posted April 11, 2001 Share Posted April 11, 2001 Strictly speaking most oil seals are directional, if you look carefully at the lip you will see some small raised ribs like a very loose spiral which are designed to encourage any oil which makes it past the lip straight back in again, these are similar to the oil retaining scrolls fitted to cranks before the days of reliable oil seals. These worked like an archamedian screw and moved the oil away from the seal point. Depending on the direction of these small ribs the turning oil will either be encouraged back to the seal or spun out of the seal, hence the need for a change of direction for the ribs depending on which end of the cam they are fitted. In practice if the cam surface is good, the seal is new and square in place it makes very little difference on a seal of that size, on a crank seal with pressurized oil just the other size and a larger diameter it can make a difference. Oily Link to comment Share on other sites More sharing options...
Peter Carmichael Posted April 12, 2001 Share Posted April 12, 2001 Rover superseded the original directional oil seals with a one part fits all seal. The directional ones are not a bad thing at all, so stick with them. Link to comment Share on other sites More sharing options...
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