oil pumps

[notron46]

I was bouncing around the internet, when i came across an article on oil pumps. the kind that sucks the oil out the dip stick. they went on to say that tests should that on the average, only 2 to 3 teaspoons of oil came out of the drain plug after the pump was used. they also did it when the oil was hot. if these are any good, it sure would make changing the oil easier and a lot cleaner, because you take the whole pump to your auto shop to dump. the one i looked at held 15 qts. has anyone used one of these and would you recommend it. ????????????

 

[LandShark]

I've used several of these pumps; both electric and manual. They have lots of little tubes that connect to get from the pump into the dip stick. They tend to be more messy than just using a bucket or oil collection pan under the truck, and they are a pain to use, and they are slow. I've used them mostly on boat engines where there is no other choice.

 

[notron46]

thanks, landshark for my one and only reply. but i liked what you advised. thanks, norton

 

[JMarketos]

Thanks to OP for originating this Q, and to Landshark for offering first hand info reply.
I've been tempted to get one of these for many years, on perceived convenience. I figure it would take longer to extract the oil through a thin tube, but can do something else in the meantime. But somehow I just can't conceive that the extractor would get all the oil out, comparable to drain plug. And frankly, I don't "buy" the notion that the extractor gets out all but ~ 3 teaspoons. And I didn't think about additional messes. I'll stick with the old way. Gotta be underneath anyway to hit the grease fittings, and also take a general look at things while in the southern region...

 

[JLEONARD]

I have also used these pumps and systems on boat engines, mostly diesels.

(one Perkins and one Ford-Lehman).

They are sometimnes successful and sometimes not so good.

It is very dependant upon the oil being very hot and thin so it can come up thru the small tube. Also dependant upon how the plastic tube feels like curving once it gets to the pan.

I would say that half the time I was able to get all the oil out, and half the time left a half quart to a quart in the pan. (That is judging from how much it took to refill)



In a boat is is very hard to impossible to get the engine and oil up to temperature at the dock which is obviously where one does the oil change. If you do it after comming back from a cruise the engine room is usually too hot to deal with.

So... in a truck this method should be more reliable since it is easier to get up to temp and when hot you are not in a confined hot space.



And some pumps are better than others.



Make sense?



All that said, the Cummins in my 91 and the Cummins 6BTA I had in a boat were very easy to change oil. The filter can be removed without spilling a drop. My 91 was very easy to get underneath, and the marine Cummins had a large hose fitted to the oil pan plug (front pan mounted plug as the engine was installed nose down) that came up to the top of the motor in front of the Bosch p pump. It was easy to hook up a hose to that and suck the oil out . That system would get all the oil out (except what would slide back down the hose when you stopped pumping).



Now that type of system would be ok to install in a truck IMO.