Thread: Oil change by evacuation

From wasting many hours on US boating sites
I can tell you two things
-Our 'mericun cousins run their outboards harder than Ozzies
-They love doing oil changes via extraction

Argument is that the amount of oil let in sump is insignificant
Extractor makes oil changes easy

I would extract - then drop the plug into a clear container
On that I would then decide the way forward

I have used an extractor for Volvo marine diesels ... you complain about slow try waiting on a 20L sump!!!! Best mod ever was to replace the sump on that engine with a stainless model with drain plug.... at haulout water And detergent into bilge pull the sump plug and oil comes out the drain plug at the transom into a bucket.

Originally Posted by PeterJ

Yes sure have, Mityvac unit works very well, I use it for my mid-cycle oil change. I had the same though as you Tombie, what's going to be left in the sump. I saw some videos on youtube that did a comparison between draining and vacuum and showed no problem and if I remember correctly the vacuum extraction actually removed a bit more oil. I think a motor with a tube for vac extraction designed for the job would be fine. Question is what do the dealers do, drain or vac it? Does anyone know. What point LR going to the cost of design, manufacture and install if no intention to us it. No way would they do that, vehicle manufacturers do not spend money for no reason. You can bet they tested it to make sure it recovered the oil and also contaminates. Also when you consider the nature of modern oils, especially (the cost of) the LR specified castrol, they are highly detergent and good at keeping things clean on the inside.

Hi Peter,
Whats your Disco? The Mityvac smallest tube is 5.7mmOD, this will not fit down the extraction tube on my D4. Is a tube actually inserted down to the sump or a seal with tube attached at the top??

Originally Posted by Kandy

Hi Peter,

Whats your Disco? The Mityvac smallest tube is 5.7mmOD, this will not fit down the extraction tube on my D4. Is a tube actually inserted down to the sump or a seal with tube attached at the top??

You don't stick the extraction tube down the LR tube. You use a small piece of hose to join the extractor to the tube in the engine bay.

The only time you stick the tube down into the sump is on cars not specifically designed for extraction, where you might shove it down the dipstick tube.

Originally Posted by DiscoJeffster

You don't stick the extraction tube down the LR tube. You use a small piece of hose to join the extractor to the tube in the engine bay.

The only time you stick the tube down into the sump is on cars not specifically designed for extraction, where you might shove it down the dipstick tube.

Well thank you DiscoJeffster, Im starting to think I missed something somewhere in all my searches about the process of oil extraction from that narrow tube. Any hints on what tubing and how strong the seal needs to be Cheers

Originally Posted by Kandy

Well thank you DiscoJeffster, Im starting to think I missed something somewhere in all my searches about the process of oil extraction from that narrow tube. Any hints on what tubing and how strong the seal needs to be Cheers

Sure. I'm using a piece of 6.4mm fuel hose around 2-3 inches long that fits both to ends to make an air tight seal. See image below as an example.

Where do you buy these oil extractors???
Andrew

Originally Posted by DiscoJeffster

Sure. I'm using a piece of 6.4mm fuel hose around 2-3 inches long that fits both to ends to make an air tight seal. See image below as an example.

A cable tie on the joints will ensure an airtight connection.
Andrew

I got mine on eBay. Search Pela oil extractor or Hilta brand for examples. Can get them from marine stores too as most marine engines use extraction.