Hose size for oil extraction from 3GM30F

skyflyer

skyflyer

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I'm doing my own servicing for the first time this year and plan to extract the old (warm) oil using a Pela type pump, through the dipstick hole. I'm 4hrs away fro the boat so cannot measure what size tube i need to get to the bottom of the sump through the dipstick tube.

Can anyone help with sizes; also do these type of pumps come with suitable thin hoses or would i need to buy something like a long metal tube to fit inside the dipstick tube and clip the hose to the end of it?

Thanks
 
If the oil is hot it will come out just fine with the tube on the pela pump. A metal tube will help in reassuring you that you've reached the bottom of the sump but isn't strictly necessary.
If the oil is cooler than ideal it will just come up more slowly but it will still come.
 
Ok but i wasn't necessarily going to buy a Pela brand so wondered what tube diameter i needed. Or is it a case of having a Pela or nothing?
 
On my 2GM20F the dipstick hole is 10mm diameter.
I'll be very surprised if the 3GM30F is different.
The 10mm tube supplied with the Pela fits perfectly. The very small metal tube supplied with the Pela takes for ever.
 
I bought a Pela 6000 pump years ago and it's one of the best things I ever bought, a new one will come with two different sized pipes for the dip stick it's usually the smaller one
you use as 'I think' the larger one is for motor bikes etc.

Yes oil comes out no problem after the engine has run a bit to warm it up

Of interest I also used my Pela pump for also removing all my diesel when I cleaned the diesel tanks, by just fed it down the filler pipe, simple but good bit of kit.
 
skyflyer said:
I'm doing my own servicing for the first time this year and plan to extract the old (warm) oil using a Pela type pump, through the dipstick hole. I'm 4hrs away fro the boat so cannot measure what size tube i need to get to the bottom of the sump through the dipstick tube.

Can anyone help with sizes; also do these type of pumps come with suitable thin hoses or would i need to buy something like a long metal tube to fit inside the dipstick tube and clip the hose to the end of it?

Thanks
Click to expand...

On my Yanmar 3YM the best way is to push the plastic tube over the top of the dipstick (12mm tube I think) as it sucks out very quickly through the wider bore. Does the 3GM not have the same design dipstick?

Richard
 
RichardS said:
On my Yanmar 3YM the best way is to push the plastic tube over the top of the dipstick (12mm tube I think) as it sucks out very quickly through the wider bore. Does the 3GM not have the same design dipstick?

Richard
Click to expand...

not sure that goes to the bottom of sump tho? i'll try it next time (3GM30F)
 
bikedaft said:
not sure that goes to the bottom of sump tho? i'll try it next time (3GM30F)
Click to expand...

According to this guide http://www.everson33.nl/Everson33/Everson_33_files/Yanmar 1GM10 2GM20(f) 3GM30(f).pdf you can simply use a pipe over the top of the dipstick guide tube (as the author calls it) with the GM series.

With my YMs I have to push the tube over a coupel of cms to cover the air hole in the side of the tube but perhaps the GM doesn't have the air hole but it's easy to see/feel if there is one before you start.

Richard
 
If you use the pipe down the tube then don't push it to the bottom right away. This restricts oil flow. Pull it back a few mm until you get most of the oil out.
Personally I am looking forward to trying the "over the dipstick method ". (Don't tell SWMBO she may get jealous)
 
RichardS said:
According to this guide http://www.everson33.nl/Everson33/Everson_33_files/Yanmar 1GM10 2GM20(f) 3GM30(f).pdf you can simply use a pipe over the top of the dipstick guide tube (as the author calls it) with the GM series.

With my YMs I have to push the tube over a coupel of cms to cover the air hole in the side of the tube but perhaps the GM doesn't have the air hole but it's easy to see/feel if there is one before you start.

Richard
Click to expand...

The workshop manual for my GM series says to push the tube down inside the dipstick hole and that is what I have always done. Originally I used one of the brass pumps, then changed to a large Pela and later to one of the smaller ones. In every case the tube provided fitted down the dipstick hole.

I don't think there is a tube that protrudes from the block to which a Pela tube could be connected. My memory is that I have to feel along the top of the sump flange on the block to find the hole before inserting the dipstick (very difficult access). I have been looking on line and find the same information.
 
Last edited:
vyv_cox said:
The workshop manual for my GM series says to push the tube down inside the dipstick hole and that is what I have always done. Originally I used one of the brass pumps, then changed to a large Pela and later to one of the smaller ones. In every case the tube provided fitted down the dipstick hole.

I don't think there is a tube that protrudes from the block to which a Pela tube could be connected. My memory is that I have to feel along the top of the sump flange on the block to find the hole before inserting the dipstick (very difficult access). I have been looking on line and find the same information.
Click to expand...

IIRC some Yanmar engines (YM series ???) have an external dipstick guide tube which is connected to a fitting near the bottom of the oil pan. In these cases a pump/ Pela suction tube can be connected to the top and the oil extracted relatively quickly

HOWEVER the dipstick in the GM appears to be exactly as you recall and describe . Inserted into a difficult to locate hole in the crankcase flange.

Even the diagrams in Richard's link show this with a suction pump being used in the usual way with a tube inserted into the dipstick hole I don't understand why he thinks its shows anything different !
 
VicS said:
Even the diagrams in Richard's link show this with a suction pump being used in the usual way with a tube inserted into the dipstick hole I don't understand why he thinks its shows anything different !
Click to expand...

All I can 100% guarantee is how to do it with the YM series, as I keep saying. :)

The guy in my GM link says "After removing the oil dipstick, attach the hose of the oil drain pump to the dipstick guide hole" and there is no mention of pushing the hose down the dipstick tube or having to be careful how far, or not, you push it down. Obviously you can read that how you like, Vic, but to me it looks as if he believes that the dipstick tube goes to the bottom of the sump.

Richard
 
Given a choice between Yanmar's workshop manual or some guy'shome made cheat sheet I know which I'll be using!

In fact I'll do both. See how much comes out with the "hose over" method then how much MORE comes out with dip tube method

I'll report back in a few weeks
 
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