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Oil Change by Suction
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gmerry   
Wed Jul 01 2015, 07:59am
Joined: Dec 11 2009
Member No: #21
Location: Scotland
 Markp, I think you have cracked this. Any idea how to reliably seal a suction tube to the top of the dipstick tube (I would be thinking of a metal adaptor with an o ring seal?

Regards
G
eduardomaio   
Wed Jul 01 2015, 07:09pm
Joined: Apr 18 2012
Member No: #869
Location: Lisbon
 I have changed the oil on mine, both by suction and by gravity. I get about the same quantity of oil with both ways.

I have a Mityvac MV7201 and I use the smallest tube, since is the same that I use for my girlfriends Smart.

About the manual, this is the phrase:

The end of the dipstick guide tube has been enlarged, which enables a tube to be connected to a suction draining device.


The end of the dipstick guide tube is near the oil sump, not at the top. Also, enables a tube to be connected to a suction draining device. Not the tube or the guide tube, but a tube.

It would be impossible to take all the oil out with a tube creating a vacuum at the top of the dipstick guide tube.
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markp   
Wed Aug 05 2015, 04:16pm
Joined: Jun 10 2014
Member No: #1746
Location: Somerset
 I have now done an oil change by suction.

I had to put the tube belonging to the suction device all the way down the dipstick tube (which is the opposite of my speculation above, but perhaps agress with eduardomaio's point). Even then, at higher suctions, I would get leaking from the atmosphere down the dipstick tube (even though the suction tube was a fairly tight fit with the dipstick tube). Perhaps some grease on the suction tube would have sealed the gap with the dipstick tube?

Despite the leaking I was able to suck out the oil (note that Citroen say that you can suck more out than you can drain via the sump plug). I did have to push the suction tube in and out to try to get it to the optimum depth in the sump/dipstick tube (at least that is what it felt like).

Using suction saves you from having to go and buy a new sump plug washer and it reduces the risk of the sump plug falling out afterwards (draining your oil and ruining your engine) because you didn't refit it correctly. Suction does take longer, but it means you don't have to get under the car.
gmerry   
Sat Feb 20 2016, 12:56pm
Joined: Dec 11 2009
Member No: #21
Location: Scotland
 Hi all, I had another go at changing the engine oil by suction. This time, I used the smallest suction pipe included with the Pela (looks same as Sealey hand pumped suction unit) and I managed to get it much deeper than end of dipstick. Result was 5.5 litres, including what drained out of the filter. This is the same as I get by gravity drainage, but slightly less than the "book". I guess I'm happy with this and will do the same in another 6 months.

Its a very clean and quick way of doing an oil change, of course the engine must be hot same as any other method. By my reckoning, this has got to be much better than leaving a car with a garage where they will drain out the oil from a cold or if you are lucky lukewarm engine. With a pair of disposable gloves, did not even need to wash my hands at the end of the job.

I've used the Mahle OX205 filter again: easiest to get these from Landrover dealers or specialists. Beware of all the cheap Chinese filters now flooding the market. Oil was Miller XF 5w30 ACEA C2 again.

Regards
G
gmerry   
Thu Mar 03 2016, 11:22am
Joined: Dec 11 2009
Member No: #21
Location: Scotland
 Here's another use for the Pela650. There's a post on an MG ZT Forum about using the oil extractor pump to fill the cooling system, via vacuum (SAME METHOD AS USED IN CAR ASSEMBLY PLANTS).

- Click Here -

Basically, the Pela650 is hooked up to the coolant tank filler using a rubber bung and flexible tubing. A 2nd piece of tubing leads from the rubber bung to your container of fresh coolant. Valves or clamps are used to isolate each of the tubing runs.

To use, clamp the tubing leading to the fresh coolant. Pull a vacuum on the coolant system and evacuate the trapped air in the system. If the vacuum won't hold, this indicates leaks in the system which should be addressed no matter what the coolant filling method used. Then isolate the vacuum source (e.g. Pela650) and unclamp the tubing leading to the submerged end in the fresh coolant container. The system will then fill itself, including any local high points and dead spaces, without having to undo bleed valves and generally muck about. Small valves instead of clamps would work fine

Regards
G
C6Dave   
Wed Mar 09 2016, 08:44am

Joined: Oct 01 2009
Member No: #1
Location: Northumberland
 If anyone wants to try this, Lidl have some cheap suction pumps in this week which can be used for oil or diesel.
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