1998 S70 Oil change using vacuum pump?

JRev · Post by **JRev** » 04 May 2015, 07:09

As title, anyone have experience of using a vacuum pump for an oil change? and if so any recommendations or ones to avoid? Cheers!

Post by **cn90** » 04 May 2015, 08:14

There is quite a bit of experience in bimmerfest BMW E39 forum.
Some BMW people there use plastic but most would recommend metal canister (so it does not collapse under vacuum).

They recommend Air Power America 5060 Topsider Multi-Purpose Fluid Removing System...~ $50 on amazon:

https://www.amazon.com/America-5060-Tops ... B001445IZ8

Seaway · Post by **Seaway** » 04 May 2015, 09:11

The one I use for my boat was purchased at West Marine and is made out of plastic. It doesn't collapse under pressure or anything.

This one would even be large enough for all the oil in these cars

https://www.amazon.com/Mityvac-7400-Lite ... actor+pump

JRev · Post by **JRev** » 10 May 2015, 07:52

Cheers for the reply, in the end I looked at this on the uk amazon site

http://www.amazon.co.uk/Pela-6000-Oil-P ... acuum+pump

Post by **98v70dad** » 10 May 2015, 09:17

I use one I purchased at West Marine. The wall thickness of the cylinder is very thick and it won't collapse under vacuum. The model I bought doesn't hold enough volume to hold all of the oil from a V70 but this not really a big issue. I just disconnect the hose, empty the cylinder, hook it all back up and . The whole pumping/evacuation process can take less than 5 minutes. There is still a little mess and time involved with changing the filter.

I have compared pumping versus draining and find them to be roughly equivalent. One time I drained the oil and then tried to pump some more out. I was able to remove an additional cup (around 250 ml). This "experiment" was done with the car on ramps. I don't know if you can remove more or less oil if not using ramps.

I've also found the pump to be very useful in completing other tasks. It works for changing the oil in the lawn mower, removing coolant from the radiator, removing transmission fluid if its overfilled , etc.

Post by **98v70dad** » 10 May 2015, 09:17

I use one I purchased at West Marine. The wall thickness of the cylinder is very thick and it won't collapse under vacuum. The model I bought doesn't hold enough volume to hold all of the oil from a V70 but this not really a big issue. I just disconnect the hose, empty the cylinder, hook it all back up and finish pumping out the oil. The whole pumping/evacuation process can take less than 5 minutes. There is still a little mess and time involved with changing the filter. The unit I use takes about 7 easy strokes of the pump to get enough vacuum to fill the cylinder. Once you achieve enough vacuum you can just stand back and watch the oil flow in. You can buy units with electric pumps but I would say they are not worth the trouble since the hand pump is almost no effort.

I have compared pumping versus draining and find them to be roughly equivalent. One time I drained the oil and then tried to pump some more out. I was able to remove an additional cup (around 250 ml). This "experiment" was done with the car on ramps. I don't know if you can remove more or less oil if not using ramps.

I've also found the pump to be very useful in completing other tasks. It works for changing the oil in the lawn mower, removing coolant from the radiator, removing transmission fluid if its overfilled , etc.

JRev · Post by **JRev** » 10 May 2015, 15:08

Sounds like it was a good purchase! nice tip there about other uses, especially for coolant radiator.