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Proper Way to flush coolant System

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Old Mar 2, 2004 | 08:29 AM
  #1  
MugenB16A2's Avatar
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Default Proper Way to flush coolant System

OK, I still have OIL flowing thru my coolant system from when I had minor problems... They are solved now.

I want to know how to properly get ALL of the Coolant/Oil out of my Fluidyne AND out of my block galleys... etc. etc.

Then I will fill my radiator back up with coolant....

How do I flush EVERYTHING totally out???
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Old Mar 2, 2004 | 09:11 AM
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Default Re: Proper Way to flush coolant System (MugenB16A2)

I've flushed my radiator 2 ways. The first time I used one of those radiator flush solutions and ran it through my radiator then refilled. The second time, I drained the radiator and block as usual. Then I bought 5 or 6 gallons of distilled water and put it through the cooling system. I would run the car for a little bit and then drained the water. I kept on flushing with distilled water till it came out clear. Lastly, make sure you have your heater on high, while flushing the system.
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Old Mar 2, 2004 | 09:13 AM
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Default Re: Proper Way to flush coolant System (timmy8151)

couldn't I just run a hose thru the top of the radiator, while the car is running and the drain open???

This prolly sounds more like the Mullet Method, but I was just asking
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Old Mar 2, 2004 | 10:01 AM
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Default Re: Proper Way to flush coolant System (MugenB16A2)

it won't flush the whole system if you just do the radiator. you can however, disconnect the main hose from the block and flush it that way. there was a topic a few weeks ago discussing it.
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Old Mar 2, 2004 | 10:03 AM
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Default Re: Proper Way to flush coolant System (MugenB16A2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MugenB16A2 &raquo;</TD></TR><TR><TD CLASS="quote">couldn't I just run a hose thru the top of the radiator, while the car is running and the drain open???

This prolly sounds more like the Mullet Method, but I was just asking </TD></TR></TABLE>

This is probably the most common method to flush a radiator. However, I prefer to use only distilled water through my cooling system.
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Old Mar 2, 2004 | 11:14 AM
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Default Re: Proper Way to flush coolant System (timmy8151)

some of my friends prefer unhooking their bottom rad hose from the rad, and putting a garden hose in it. and just let it run like that for a while.
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Old Mar 2, 2004 | 11:22 AM
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Default Re: Proper Way to flush coolant System (doublejz)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by doublejz &raquo;</TD></TR><TR><TD CLASS="quote">some of my friends prefer unhooking their bottom rad hose from the rad, and putting a garden hose in it. and just let it run like that for a while.</TD></TR></TABLE>

you mean put the garden hose in the bottom radiator hose??? and let the car run???

also do I leave the drain plug open or closed during that time????
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Old Mar 2, 2004 | 11:29 AM
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Default Re: Proper Way to flush coolant System (MugenB16A2)

yea they wrap ductape around the lower rad hose with the garden hose in it (to hold the hose in it and to make sure enough watere is being taken in), and leave the drain plug closed this will blow everything outta the bottom of your rad where you disconnected the hose.
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Old Mar 2, 2004 | 11:50 AM
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Default Re: Proper Way to flush coolant System (doublejz)

and this will flush out all the ramaining oil????
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Old Mar 2, 2004 | 02:32 PM
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Default Re: Proper Way to flush coolant System (MugenB16A2)

i mean if you want to make sure the oil is flushed, just get a flush kit liquid **** and follow the directions. The flush kit will probably help disolve or remove the oil, dunno if the oil would float outta your cooling system with just water. But if you want to make sure you get all the chunks of **** out just running the flushing **** and draining the rad probably won't do it, it'll just drain the rad. But with my friends hose idea your constantly removing and putting in new water, which would get the junk out.
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Old Mar 2, 2004 | 06:14 PM
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Default Re: Proper Way to flush coolant System (MugenB16A2)

You can flush your Cooling Sytem anyway you want.

With my GSR, I prefer to disconnect to Upper Hose from the Radiator and the Lower hose from the Block. From there I remove the Thermostat and Block Drain bolt. Then I'd pull the Radiator and flush water from the top of the Radiator through to the Lower Hose and backflush it the other way (you don't have to pull the radiator). From there I'd shoot water through the block starting where the Thermostat goes in and let it come up where the Upper Hose connects and then backflush it.

To remover the Oil residue, you can buy a kit if you want. But my instructor once told me to just use a little dish soap and it works fine..

But like I said, just do it your way.. Have fun..
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Old Mar 2, 2004 | 07:39 PM
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Default Re: Proper Way to flush coolant System (MugenB16A2)

For a quick and easy flush, first drain both the radiator and engine block. Flush the radiator out with a garden hose. Then disconnect one of the heater hoses, turn on the heater, and try to seal up the end of the garden hose to the heater hose as best as you can. This will flush out the heater core, head, and block. Now this might not give a perfect flush. But it is ALOT better than letting the engine run while simultaneously adding and draining water.
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Old Mar 2, 2004 | 07:48 PM
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If you want to flush your coolant system properly, you'll need a machine like a Wynn's Du-All.
You unhook your top radiator hose, connect the fittings, add the radiator flush, run the engine until it's warmed up.
You then hook the fittings (they have a valve) to the machine.
You have around 8 litres of coolant in the machine and it adds the new and takes out the old.
Considering you had oil in your coolant, you might want to use 12 or 16 litres.

This method removes around 95% of the old coolant.
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