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#1 Old 02-02-2013
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oil change

hi all, I bought one of those suction pumps to use for oil change, I dont know if I am doing something wrong or what, I insert the tube through the deep stick location, but takes me to constantly manipulat the tube to be able to suck out oil, can someone tell me if there is a better way to use this pump?
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#2 Old 02-02-2013
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Did you look in either the r170 DIY or the r171 DIY for oil change?


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#3 Old 02-03-2013
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oil change

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Originally Posted by jbanks15 View Post
Did you look in either the r170 DIY or the r171 DIY for oil change?
Hi, yes I did, I was doing everything right the way I was suppose to do, it was working very slow, that is why I asked the question if I was doing something wrong.
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those that have used it should respond when they sober up!


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#5 Old 02-03-2013
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Originally Posted by jbanks15 View Post
those that have used it should respond when they sober up!
Oi, some of us were out working last night!!

Have you got the oil good and hot - it makes a big difference if you take your car for a 15-20min blast before you try changing the oil.



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#6 Old 02-03-2013
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Not sure what model unit you have, but here are a few tips:
1. Make sure the oil is hot/warm as mentioned.
2. Cut the end of the suction hose at a 45 degree angle so it doesn't suck itself to the bottom of the pan.
3. If you have any 90 degree bends at hose connections, make sure you haven't pushed the hoses in too far so that the oil doesn't have room to move through.
4. Make sure you don't push the hose into the oil pan too far so that it bends around and is just sucking air.

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#7 Old 02-03-2013
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Originally Posted by sokoloff View Post
Not sure what model unit you have, but here are a few tips:
1. Make sure the oil is hot/warm as mentioned.
2. Cut the end of the suction hose at a 45 degree angle so it doesn't suck itself to the bottom of the pan.
3. If you have any 90 degree bends at hose connections, make sure you haven't pushed the hoses in too far so that the oil doesn't have room to move through.
4. Make sure you don't push the hose into the oil pan too far so that it bends around and is just sucking air.
Hi, I have the Mityvac 7300, last night after using it I was not sure if it sucked everything out, I cowled under the car undid the drain screw, nothing came out, so it did the job, however it did not happen in fifteen minutes, as was told, that is why I thought I was doing something wrong.
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#8 Old 02-03-2013
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The only other thing I could tell you is to take off the oil filler cap, but you probably already know this. I've done my 171 several times this way and never thought it was taking too long - and I even do mine cold.

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#9 Old 02-03-2013
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Originally Posted by REB_TN_06 View Post
The only other thing I could tell you is to take off the oil filler cap, but you probably already know this. I've done my 171 several times this way and never thought it was taking too long - and I even do mine cold.
yes I do including the oil cap it does make difference
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#10 Old 02-03-2013
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The previous advice is correct but perhaps you have a problem with the pump. Try the pump in a tub/bucket of water so you can see what it is doing. If it sucks 6 litres of water in about 5 minutes with about 10 vacuum building pumps it is working OK and should suck hot oil at about the same rate.

Sometimes mine gets stuck, not sure if clogged or the float becomes stuck and it pumps very slowly or I need to pump more often. Maybe just crap in the old oil so the water flushes it.

Also my extractor came with 3 tubes of various sizes/flow rates and a rubber connector for using more than one tube. Use the shortest, thickest tube you can get down the dipstick hole. I put my extractor on a stand so the short tube will reach the bottom of the pan.

I bought a Pela that holds 6.5L because who in their right mind would design an engine that holds more than 6L oil? ... Oops!

G

Last edited by gdb069; 02-03-2013 at 10:01 PM.
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#11 Old 02-03-2013
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Originally Posted by gdb069 View Post
The previous advice is correct but perhaps you have a problem with the pump. Try the pump in a tub/bucket of water so you can see what it is doing. If it sucks 6 litres of water in about 5 minutes with about 10 vacuum building pumps it is working OK and should suck hot oil at about the same rate.

Sometimes mine gets stuck, not sure if clogged or the float becomes stuck and it pumps very slowly or I need to pump more often. Maybe just crap in the old oil so the water flushes it.

Also my extractor came with 3 tubes of various sizes/flow rates and a rubber connector for using more than one tube. Use the shortest, thickest tube you can get down the dipstick hole. I put my extractor on a stand so the short tube will reach the bottom of the pan.

I bought a Pela that holds 6.5L because who in their right mind would design an engine that holds more than 6L oil? ... Oops!

G
I had a Porsche took 8 quarts of oil although most cars take less than 8
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#12 Old 02-05-2013
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Quote:
Originally Posted by ardo View Post
Hi, I have the Mityvac 7300, last night after using it I was not sure if it sucked everything out, I cowled under the car undid the drain screw, nothing came out, so it did the job, however it did not happen in fifteen minutes, as was told, that is why I thought I was doing something wrong.
Another example that removing your oil via the suction method does in fact get out as much if not more than draining from the bottom. Not advocating for either - just stating that there is more than one way to get the job done.

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#13 Old 02-05-2013
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You will find you can buy more hose at Home Depot and the like - it's the same as used for A/C drains and furnaces etc. The lower the pump sits the better as it will be assisted by siphoning. One thing I do, admittedly wasteful, is to pour a warm (warm it in a basin of hot tap water first) can of standard 5w30 down the filter galley - this cleans out the galley, through the pump housing and flows immediately into the pan. Then when you suck it out you can clearly see you're getting "dirty" new oil (after having already emptied the pan).

I also marked my hose every 12" so I know how much I'm inserting down the dipstick tube. I estimate it's about 18" from the top of the tub to the pan...and maybe a couple more so it lays at the bottom of the pan.


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#14 Old 02-05-2013
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If for example the car you bought had not a frequent oil change and in the sump there was lumps / deposits in sump .
Would not using a suction pump not suck all them deposits out ??

If draining the oil out and it was hot and i mean hot the engine gusshes out at an extreme rate wont it have more of a pull to remove most of gumpf out ??

Im not discussing the amount of oil removed by either process but if one will shift more crap out of the bottom of the sump !
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#15 Old 02-05-2013
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Quote:
Originally Posted by Delucas View Post
If for example the car you bought had not a frequent oil change and in the sump there was lumps / deposits in sump .
Would not using a suction pump not suck all them deposits out ??

If draining the oil out and it was hot and i mean hot the engine gusshes out at an extreme rate wont it have more of a pull to remove most of gumpf out ??

Im not discussing the amount of oil removed by either process but if one will shift more crap out of the bottom of the sump !
I don't have practical experience with "lumps" in the sump. From what I have read the oil filter should pick up almost all particulate and deposits small enough to pass through the filter should be suspended if you warm your oil by running the engine a few minutes.

G.
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#16 Old 02-05-2013
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Quote:
Originally Posted by gdb069 View Post
I don't have practical experience with "lumps" in the sump. From what I have read the oil filter should pick up almost all particulate and deposits small enough to pass through the filter should be suspended if you warm your oil by running the engine a few minutes.

G.
Have you removed any sumps off any cars lately ?
You will be supprised what you find in them sump's .
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I received the same mityvac for Christmas so was interested in this thread. I know some of the feedback on Amazon indicates there is no gasket between the cover and the body so lack of suction could be an issue. The instruction booklet recommends tightening the cover screws on first use and periodically there after. If I ever have an issue I'll cut a gasket from rubber sheet.

As I will be changing my oil for the first time this weekend, I pulled out the mityvac, pugged in the extraction tube and stuck it into the back of my toilet. 10-12 pumps and ~ 5 minutes later the mityvac was full. Pushed the switch on the direction valve and dispensed the toilet water back. Incredibly simple.

I'll report back Saturday...
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#18 Old 02-05-2013
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Quote:
Originally Posted by Delucas View Post
Have you removed any sumps off any cars lately ?
You will be supprised what you find in them sump's .
No I haven't removed many sumps / oil pans. I did remove the oil pan from my 2001 Corolla (300,000km) because I heard Toyota was very susceptible to sludge but none there. I also split the crank on my 1995 Honda 1100 MC and no sludge there. As with all my vehicles, I follow the service intervals have switched to synthetic and use quality oil/filters.

With regards to sludge I understand that to be the result of contaminants that have not been handled by the oil additives: detergents and dispersants most likely cause by high heat or neglecting oil interval change. Mitigating this, MB incorporates a large oil capacity (8L) and recommends synthetic oil that is less prone to heat issues.

TBN is the Total Base Number that indicates how much additive life is left in the oil. The synthetic I use starts fresh at about 12 TBN and testing indicates the oil TBN is 6 when I replace (although I replace on a time basis since I don't reach the mileage limit). Based on the TBN I expect no contaminates to form sludge.

G.
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#19 Old 02-06-2013
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oil change

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Originally Posted by stevebis1 View Post
I received the same mityvac for Christmas so was interested in this thread. I know some of the feedback on Amazon indicates there is no gasket between the cover and the body so lack of suction could be an issue. The instruction booklet recommends tightening the cover screws on first use and periodically there after. If I ever have an issue I'll cut a gasket from rubber sheet.

As I will be changing my oil for the first time this weekend, I pulled out the mityvac, pugged in the extraction tube and stuck it into the back of my toilet. 10-12 pumps and ~ 5 minutes later the mityvac was full. Pushed the switch on the direction valve and dispensed the toilet water back. Incredibly simple.

I'll report back Saturday...
you say push the switch on direction valve? I should investigate that, I did not know there was a valve.
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Ardo- I just checked the model number and I have the 7201, not the 7300. I went to the mityvac website to see the difference and it indicates the 7300 is powered by an air compressor not a pump.

Does yours have a hand pump? Go to mityvav.com to confirm. If you do have the 7201 then you will see a small black cylinder attached to the side of the hand pump. This is the direction valve. There is a slide - you slide it one way for dispense and the other for evacuate. Perhaps yours is stuck in the middle? If you really have a 7300 then I do not understand how you get it to work at all.

In anycase with all this talk of changing oil and pumps, I could not wait to the weekend. Last night when I got home from work I changed mine. I cannot believe how easy it is on this car! If it weren't for $75+ in materials I would change it more frequently.

Pulled in the garage, popped the hood, pulled out the dip stick and slid in the tube. The plastic tube is quite stiff so it slid in easily and made possitive contact with the bottom of the oil pan. No fishing around, very tactile and intuitive. Pumped the pumped 10 - 12 times and took off the oil cap. Came back about 10 minutes later and discovered it had stopped with a bit more than half full. Pumped another 10 pumps and went about unscrewing the filter housing. Replaced with a new Mann from Amazon, replaced the O rings and screwed it back on the engine.
By this time all the oil was out so I cracked the first bottle of Mobile 1 0-40 and started filling. 8 bottles later I was mostly done. Started up an ran for minute then let the oil settle as I reversed the pump switch and dispensed the used oil into the old bottles. When I finished I pulled the dipstick saw I was a touch shy of full so I added about a third of a 9th bottle.
simple as can be and I never changed out of my work clothes! Total of 45 minutes. Would have been 20 but as this was my first time I took my time.
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