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Oil Pump - High Volume upgrade
- Thread starter keanej
- Start date
This will uprate the pump up to SD1 spec, which is higher volume, but unless it has a modified oil pressure relief valve spring included,or a spacer for it, it will not give higher pressure. As for fitting it will just need to be primed up before starting by packing with vaseline on assembly.
Anything that puts the oil flow volume up is a GOOD IDEA.
Pressure is not too important, within reason. The design of the bearings traps oil between the bearing surfaces at a huge pressure. The sole function of the oil pump generated pressure is to get the oil to travel round the engine to get within reach of the bearings - it's nowhere near enough to force the oil into the working area of the bearing. If you think about what you see in the bearings, the oil feed holes are on the low pressure side of the bearing, away from where the bearing is being loaded. That's why oil viscosity is important - if the oil wasn't "treackly" the rotation of the bearing wouldn't drag it into the working area.
Flow is good news because it helps to dissipate heat away from the bearings and pistons - hence oil coolers.
When you have an old ###ed engine, the cause of very low oil pressure is that the bearings have developed excessive clearance and the oil is spilling out of the side of the bearing faster than the pump can supply it (and sometimes before the rotation of the bearing can drag it into the working area!).
Chris
Pressure is not too important, within reason. The design of the bearings traps oil between the bearing surfaces at a huge pressure. The sole function of the oil pump generated pressure is to get the oil to travel round the engine to get within reach of the bearings - it's nowhere near enough to force the oil into the working area of the bearing. If you think about what you see in the bearings, the oil feed holes are on the low pressure side of the bearing, away from where the bearing is being loaded. That's why oil viscosity is important - if the oil wasn't "treackly" the rotation of the bearing wouldn't drag it into the working area.
Flow is good news because it helps to dissipate heat away from the bearings and pistons - hence oil coolers.
When you have an old ###ed engine, the cause of very low oil pressure is that the bearings have developed excessive clearance and the oil is spilling out of the side of the bearing faster than the pump can supply it (and sometimes before the rotation of the bearing can drag it into the working area!).
Chris