Other Stuff > Tricks & Tips
Love this thead
K2-K6:
The 750 schematic shows the filter housing flooded first and then exit via the filter bolt centre to the pressure galleries.
I can see the logic of having magnet in sump somewhere as it would "if effective" let less ferrous go through the pump first. But as already said, the filter should be able to stop further circulation just based of its micron rating.
royhall:
If these bikes are well maintained they do 100,000 miles plus without problems. So why is it 50 years on we now need magnets on the filters. What a load of bull, that's just a fix looking for a problem that doesn't exist . As I said earlier, I have never seen anywhere near that much crap in the oil when it's changed. That guy's engine is eating itself, bet he's talking about rebuilds by spring.
K2-K6:
Agree it looks back to front and slightly illogical but the honda illustration definitely shows oil supply from filter bolt into distribution galleries for crank etc.
Isn't the filter pushed against the engine case with a spring to leave the first holes (nearest to bolt head) exposed? The route through those holes into the bolt cavity is the overpressure (blocked filter) route I thought. Haven't got one in front of me, so please correct if wrong.
Most filters like this flow inwards as they generally have a cage in the core to prevent collapse. If you blow out through the filter structure it can't be supported to prevent it dismantling itself. You do see that type but they've normally got a metal "can" with holes in it to allow that pressure direction to be contained.
The filter housing pressure is more or less the same which ever way it's pumped as the whole oil system from pump out to bearings is equal, maybe a very small pressure drop across the filter material, but that's all.
Canister car type filters are usually the same, in through the peripheral holes and out through the centre bolt.
hairygit:
If the filter becomes clogged, the pressure in the housing builds up, pressing down on the relief/bypass valve in the hollow bolt, allowing unfiltered oil to flow round the engine. The theory being, unfiltered oil is better than NO oil.
K2-K6:
Yes, if the filter gets more restrictive through particals, then pressure rises on the outside of element to a point which will breach the pressure set by the blead valve in the bolt.
This has got to be below the oil pump pressure relief valve threshold or it would just go out that way first.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version