Steel sleeved oil pump

[zero cool]

The other thing to think about is the thermal properties between the different metals used. You have the housing, the gears and now a sleeve all moving at different rates! Me thinking that can’t be good.

I figured since they can make aluminum engine blocks with steel cylinder liners, they could do it in an oil pump housing.

Besides the sides of the housing you have the floor or roof depending how you look at it, that wears too how would this be fixed?

They already make a steel midplate for just that purpose.

It was said some where that if the pump gears where made bigger (wider & longer) you could then have the housing (timing cover) machined for the new gears.

What does this have to do with improving reliability? That's all I'm thinking about. Reducing the wear on the pump housing so it continues to supply the same oil volume and pressure as factory new for a longer period of time without having to tear the oil pump apart and replace pieces.