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Thread: coolant flush

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    VIP-Member antowens's Avatar
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    Default coolant flush

    today i flushed my coolant system out so heres how i went about it:
    1)drained the exstisting coolant out the system via the valve on the raditor
    2) mixed water and blue anti freeze (dont think colour matters does it ? 50/50 equal parts water to anti freeze
    3)filled system back up
    4) turned on the engine till hot
    5)topped up to correct level

    i then as i seemed to be very dilute with what had been left in the system drained the resivior and filled it back up with antifreeze let it run round the engine and all seems good

    so after all this can anyone see were i have go wrong or if i may have caused some problems or will all be okay ?

    havent had a chance to get an antifreeze tester onto it yet but will do before week i out

    cheers in adavance

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    Quote Originally Posted by antowens View Post
    2) mixed water and blue anti freeze (dont think colour matters does it ?
    That is the completely wrong antifreeze, blue antifreeze is designed for use in cars like the original mini, mk1 Escorts and Ford Anglia's and you will do your engine no ends of harm. OAT anti freeze is designed to prevent corrosion in the numerous aluminium parts of the engine. All that will happen is the inside of the engine will start to fur up, blocking the water ways and eventually the engine will over heat.
    Why did you use the blue stuff? OAT antifreeze is only a couple of quid more expensive than blue stuff.

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    VIP-Member antowens's Avatar
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    because i had some lying round will be getting this stuff out of the engine first thing in the morning i was gunna go and buy some antifreeze them stumbled upon this stuff

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    Full Member dave1419's Avatar
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    Quote Originally Posted by Das View Post
    That is the completely wrong antifreeze, blue antifreeze is designed for use in cars like the original mini, mk1 Escorts and Ford Anglia's and you will do your engine no ends of harm. OAT anti freeze is designed to prevent corrosion in the numerous aluminium parts of the engine. All that will happen is the inside of the engine will start to fur up, blocking the water ways and eventually the engine will over heat.
    Why did you use the blue stuff? OAT antifreeze is only a couple of quid more expensive than blue stuff.
    Have to agree,get it out and put some vx stuff in,for what it costs my friend----Dave

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    VIP-Member antowens's Avatar
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    my bad coming out first thing

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    Default

    Also the only way to properly flush the engine is to remove the thermostat and allow the hose to flush out the water via the thermostat hole. By draining the water from the radiator all you have done it flush the radiator. Once you have flushed the engine and radiator properly you then find out how much the coolant system holds, lets says for practical purposes its 8lt. So you then add 4lt of pure undiluted antifreeze to the system and top up with water. The reason you add pure undiluted anti freeze is that the block of the engine will always hold clean pure water after the flush. Once you've bled the system give it a good run then test the effectiveness of the coolant. VX recommend it should make -27c.

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    VIP-Member antowens's Avatar
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    weres the thermostat then ???

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    Z18XER according to your profile, so its right hand side of the cylinder head just above the gear box. Easiest one to do, just go easy tightening it back up as its a plastic thermostat housing behind it.

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    VIP-Member antowens's Avatar
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    okay will be doing this tomorrow just gos to show doesnt it annoyed now thought i had done myself a good job today

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    Why.
    I have never been told this and have used blue stuff for ages.
    Am off to VX to get bits and will be flushing mine this weekend.
    What am I looking for on Z22YH for thermostat?
    Will it be somewhere below the crank sensor or on the back of block where the pump is?

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