Power steering pump as engine oil pump ???

[Hensen]

Just mulling this over.......
Could a power steering pump ( a suitably big one ) be used as an engine oil pump as part of a dry sump system ??
Had a quick look at specs etc and seems OK so far. Any ideas ??

Iknow, I know, its thinking outside the box.

[vetteheadracer]

why not just buy a dry sump oil pump?

www.drysump.com do them for the C5

[Hensen]

Looked on ebay, etc, could not find anything - thanks for the link.

[franv8]

It's a good thought outside of the box, just a few things about the dry sump pumps though:

- They tend to have three stages, two (parallel I think) for pulling the air/oil mix out of the crank case and sending it to the oil reservoir tank. (This tends to be quite large in volume, not filled totally with oil, but it is designed to accommodate enough oil to allow it to de-aerate before going to...)

- the third is the high pressure stage to send oil (should not be a foam by this stage) into the engines oilways for the bearings etc.

I think you'd struggle to do it without using a proper sump pump. The PAS pump may not like the viscosity of the engine oil when it's cold either.

Hope this is helpful - let us know how you get on!

[odyssey2200]

In theory you could use a PAS pump.

What happens if the belt snaps?

Instant loss of oil pressure

[stevieturbo]

The pumps are totally different and operate with vastly different pressure ranges.

[Cheburator mk2]

odyssey2200 said:

In theory you could use a PAS pump.

What happens if the belt snaps?

Instant loss of oil pressure

You are always running this risk with a dry sump system, unless the scavenge/pressure pumps are gear driven. There are many different designs - my Porsche 928 V8 engine uses a 2-stage scavenge pump, which is belt driven, whilst it retains the original internal pump on the pressure side. The Cayenne V8 uses an internal dry sump system, while the BMW E39 has a "mock" dry sump, where the wet sump is scavenged by oil pump with twin pick up, then the heads have separate pumps to prevent windage...

[odyssey2200]

Cheburator mk2 said:

odyssey2200 said:

In theory you could use a PAS pump.

What happens if the belt snaps?

Instant loss of oil pressure

You are always running this risk with a dry sump system, unless the scavenge/pressure pumps are gear driven. There are many different designs - my Porsche 928 V8 engine uses a 2-stage scavenge pump, which is belt driven, whilst it retains the original internal pump on the pressure side. The Cayenne V8 uses an internal dry sump system, while the BMW E39 has a "mock" dry sump, where the wet sump is scavenged by oil pump with twin pick up, then the heads have separate pumps to prevent windage...

The only car I have had with a Dry sump was my old Jensen Healey.

Luckily neither was belt driven as the car was unrelaible enough in the engine dept as it was (why did I butthat POS?

[LuS1fer]

odyssey2200 said:

Cheburator mk2 said:

odyssey2200 said:

In theory you could use a PAS pump.

What happens if the belt snaps?

Instant loss of oil pressure

You are always running this risk with a dry sump system, unless the scavenge/pressure pumps are gear driven. There are many different designs - my Porsche 928 V8 engine uses a 2-stage scavenge pump, which is belt driven, whilst it retains the original internal pump on the pressure side. The Cayenne V8 uses an internal dry sump system, while the BMW E39 has a "mock" dry sump, where the wet sump is scavenged by oil pump with twin pick up, then the heads have separate pumps to prevent windage...

The only car I have had with a Dry sump was my old Jensen Healey.

Luckily neither was belt driven as the car was unrelaible enough in the engine dept as it was (why did I butthat POS?

I think you can blame Colin Chapman for the engine.