Do you recommend using oil extractor/syphon rather than draining from sump plug?

AdrianC

JethroUK wrote: »

Garages have a syphon to syphon gearbox oil ONLY
Never heard of anyone SYPHONing a sump

That's easily the most common use.

BeenThroughItAll

AdrianC wrote: »

That's easily the most common use.

Yep, vacuum oil extraction via the dipstick tube has been standard practice in many manufacturer franchised workshops for years. I believe Mercedes-Benz were telling their workshops to use oil extraction via vacuum back in 1997 and since then have continued to do so.


In fact, I can even point you at the text of TSBs they issued advising such:

DATE: July 1997
SUBJECT:
ALL MODELS
OIL EVACUATION EQUIPMENT
Mercedes-Benz engines are designed to allow engine oil extraction from under the hood via the dipstick tube. The dipstick tube has an enlarged cross section and a formed extension at the top end. On the other side it ends a short distance from the oil pan bottom. Engine oil can be extracted using the dipstick tube.

Engine oil drain plugs will continue for the time being, although access to them may only be possible with the removal of engine compartment trim or noise encapsulation panels.
************************************************** *******************************


Date: March 2001
Order No.: S-SI-58.00/118
Supersedes:
Group 58
SUBJECT:
ALL ENGINES
APPROVED OIL EVACUATION EQUIPMENT
The purpose of this Service Information is to inform dealers that Approved Oil Evacuation Equipment, which is used to extract used engine oil from the engine via the oil dipstick tube, is now available for order. Mercedes-Benz engines are designed to allow the extraction of engine oil from under the hood via the dipstick tube. The engine dipstick tube has an enlarged cross section, plus a formed extension at the top end where the dipstick is inserted and the approved engine oil evacuation equipment interfaces. The opposite end of the dipstick ends just short of the oil pan bottom, thus engine oil can be extracted via the approved oil evacuation equipment by using the dipstick tube. Additionally, the engine dipstick tube itself is the conduit through which spent engine oil is moved to the oil evacuation equipment.
In addition, service and repair components for existing approved oil evacuation equipment is also available.
Note: Because the engine oil dipstick tube is the conduit through which spent engine oil is extracted, inserting tubular probes through the dipstick tube is NOT recommended.
Special Note for M-class:
Due to the location of the vehicle frame and suspension components, the draining of engine oil via the engine crankcase oil drain plug is not recommended, since this can lead to engine oil coming in contact and subsequently be damaging to the rubber suspension components. Thus, it is strongly recommended to use the approved oil evacuation equipment contained in the Service

**************************************************

force_ten

JethroUK wrote: »

Maybe im missing something in the 40 years since I swapped out motors but you do not need to SYPHON engine oil - ever!

The drain plug is always at the lowest point of the sump (no accident) and if you leave it out for few minutesafter the initial Drain to drain the residual oil then your sump will be drying than you could possibly Syphon if you did it for 40 years

Thats purely physics!

now that many cars are being fitted with under trays the main dealers are reluctant to remove them to change the oil so as you will see from the post above they are favouring using a syphon to change oil rather than take off the under tray and drain via the sump plug

londonTiger

not sure how you're supposed to get a tube down in the dipstick hole.

do you feed a small tube down all the way through the hole, or does it just attach around the dipstick hole and suck it from there?

londonTiger

a pela pump might still be useful to have, even if you're old school like me.

you may need to do roadside oil extraction to stop your engine from blowing up:

http://youtu.be/-9hC4g5ovwY?t=2m42s

Laz123

darkmatter101 wrote: »

This is interesting topic, from what I've read online some people drink draining from the sump plug is much other effective and others think its equal or a negligible difference.

I prefer the Duckhams 20-50 vintage myself. A much better distinct flavour.

Stoke

I'm confused when people say that these devices don't pick up sludge. Really thick sludge won't drain out of a sump plug either. I've taken the bottom of a sump off and the entire bottom half been coated in a thick gloopy nastiness. No amount of draining will clear that.

Something like Forte Flush might have cleared it, but really, cleaning the pan was the best way.

AdrianC

Stoke wrote: »

I'm confused when people say that these devices don't pick up sludge. Really thick sludge won't drain out of a sump plug either. I've taken the bottom of a sump off and the entire bottom half been coated in a thick gloopy nastiness. No amount of draining will clear that.

Something like Forte Flush might have cleared it, but really, cleaning the pan was the best way.

I'm not entirely convinced you WANT it all freeing off in one go, unless by mechanical means, either. Dissolving it off by some aggressive goop in the oil will only give you a VERY high risk of the pickup getting blocked.

Stoke

AdrianC wrote: »

I'm not entirely convinced you WANT it all freeing off in one go, unless by mechanical means, either. Dissolving it off by some aggressive goop in the oil will only give you a VERY high risk of the pickup getting blocked.

Very true. To be fair, sludge is less common on new cars anyway. Detergents and all that pretty much stop it.

Use a decent quality synthetic oil and you'll never get sludge anyway.

bluesnake

no £50 sealey, but wet henry instead?

https://www.youtube.com/watch?v=e6M7Cj-R090