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Author Subject: Oil in Water - How to Flush?
kevan

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Location: Heanor

Registered: 30 Dec 2005

Posts: 426

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Post #1
Hiya guys,

I'm wanting to replace an engine in my nephew's car. I've drained the oil and water and disposed of them at the local recycling centre.
When draining the coolant, there was lots of oil in there (head gasket has gone) and i was just wondering (after the engine has been removed) what's the best way to ensure all remaining oil is removed from the coolant system? I'm guessing a flush, but how do you do it with the engine removed? Unsure

Cheers Kev

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Posted 29th Jan 2011 at 21:18
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vernam616

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Location: Middlesbrough

Registered: 01 Mar 2008

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Post #2
Pressure washer?

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Posted 29th Jan 2011 at 22:04
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #3
hose pipe and degreaser.

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Posted 29th Jan 2011 at 22:33
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kevan

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Location: Heanor

Registered: 30 Dec 2005

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Post #4
welshpug! wrote:
hose pipe and degreaser.


So it's a simple as that ? Unsure

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Posted 29th Jan 2011 at 23:24
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thugpuggin

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Post #5
Yes Just need to force it out the pipes, generally only residual amounts left in pipework.

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Posted 29th Jan 2011 at 23:26
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armzsc6

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Location: Crowborough

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Post #6
Pretty much, you'll more than likely never get rid of 100% of it, after doing the H/G on my 6 a couple of years ago i kept getting tiny floating bits of oil in the top of the expansion bottle for a few weeks, just the last few bits making their way out. soon clears up if you fish them out though Wink

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Posted 29th Jan 2011 at 23:27
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kevan

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Location: Heanor

Registered: 30 Dec 2005

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Post #7
Cheers guys,

Does it matter which pipes I use or can i put 'clean' water down any andf just see where it comes out?

Should i use a 'flush' mixture, correct anti freeze/water mix or clean water?

Thanks again

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Posted 29th Jan 2011 at 23:35
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bigbadbowen

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Location: Winchester

Registered: 21 Nov 2003

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Post #8
Got some coolant flush and force it round the system - heater matrix will need a good cleaning out Wink
Posted 30th Jan 2011 at 00:03
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adam b

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Location: The Nam

Registered: 24 Jan 2006

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Post #9
Heater matrix and rad may never be the same again, just depends if you can get the crap out. Might be worth looking online to see if any degreaser is better than another.

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Posted 30th Jan 2011 at 02:08
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bigbadbowen

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Location: Winchester

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Post #10
May be a case of refill system and then drain say after a couple of hundred miles a few times to try and get the system cleaned out Wink Seems the best way to get an engine clean of really old oil Wink
Posted 30th Jan 2011 at 02:18
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

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Post #11
Fill the cooling system with water only and then put half a box of Persil washing powder in the cooling system as well. Drive the car for about 50 miles and then drain, you will find it really clears out the old oil inside the water ways....Yes

Stan.

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Posted 30th Jan 2011 at 10:29
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kevan

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Post #12
Getting a new Rad.....but never thought about the heater matrix !!!

Persil !!!!!! Unsure

Kev

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Posted 30th Jan 2011 at 13:36
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smegal

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Location: Leeds

Registered: 26 Dec 2005

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Post #13
stan_306gti6 wrote:
Fill the cooling system with water only and then put half a box of Persil washing powder in the cooling system as well. Drive the car for about 50 miles and then drain, you will find it really clears out the old oil inside the water ways....Yes

Stan.


I really wouldn't do this. Washing powder and liquid etc is quite alkali which could increase corrosion on the matrix.

I would just flush with warm water, then fill with water only and add rad flush. Repeating until it comes out clean.

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Posted 30th Jan 2011 at 17:12
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

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Post #14
smegal wrote:
stan_306gti6 wrote:
Fill the cooling system with water only and then put half a box of Persil washing powder in the cooling system as well. Drive the car for about 50 miles and then drain, you will find it really clears out the old oil inside the water ways....Yes

Stan.


I really wouldn't do this. Washing powder and liquid etc is quite alkali which could increase corrosion on the matrix.

I would just flush with warm water, then fill with water only and add rad flush. Repeating until it comes out clean.


That's basically the same method, but will just take longer. I haven't found any matrix issues by using the Persil method for some years now, rad flush is probably the designated way to do it if you have the time to wait. Smile

Stan.

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Posted 31st Jan 2011 at 13:01
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dangti6

aka JKshooter

Location: Taunton, Somerset

Registered: 15 Jun 2006

Posts: 10,305

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Post #15
Bump for Persil LOL's.

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    • Posted 21st Jun 2014 at 13:16
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    cully

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    Location: Cullompton

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    Post #16
    crushed up dishwasher tablets work well too Wink
    Posted 21st Jun 2014 at 13:21
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    buzzbrightyear

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    Post #17
    What about daz or bold?

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    Posted 21st Jun 2014 at 14:32
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    cully

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    Post #18
    buzzbrightyear wrote:
    What about daz or bold?


    give it a try but dont use fairy washing up liquid LMAO!
    Posted 21st Jun 2014 at 14:44
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    buzzbrightyear

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    Post #19
    Bubbly bubbles everywhere forever

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    Posted 21st Jun 2014 at 14:45
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    gilesy

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    Post #20
    I use mentoes and then add diet coke
    Posted 21st Jun 2014 at 15:28
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