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PostPosted: Wed Mar 30, 2005 9:34 pm 
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pink coolant is organic, and I dont know of many radiator places that recommend it. Green is glycol based. Idea behind pressurising the cooling system is, to increase the boiling temp of the water. from memory it boils at 113 under 13 psi of pressure. on any efi car it is a bad practice to run any other temp thermostat than recommended as the ECU relys on coolant temp to adjust fuel mixtures and so forth, too cool a thermostat and the ECU things the car is cold so richens the mixtures up and you use more fuel :evil:

Most radiator shops can do a clean out on the radiator for around $100 mark, it pays to shop around as the prices can vary. That is assuming you remove the radiator.

Premix coolants are not a good idea unless you rebuild the motor. Most cooling system will retain water in them, some Subarus hold nearly 1/2 of the water still after you drain the radiator.

Best idea is to flush the cooling system till clean water comes out, then drain enough water to refill with 5l of concentrate(most E series hold 15l in cooling system, and most glycol based coolant you mix 1/3 coolant 2/3 water) then top up with water. And yes distilled water is better, but nearly impossible to flush entire system out as described before.

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PostPosted: Thu Mar 31, 2005 9:39 am 
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sounds like you know what you're on about!! what sort of coolant would you recommend for an EL 6 cyl? I have heard cheapies are a no-no because they can be corrosive.

What would be the best way to flush the radiator? Remove a hose or something?

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PostPosted: Thu Mar 31, 2005 9:40 am 
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everybody that i have talked to about coolant says just stay away from the pink stuff, and if you have that now and intend to change to a glycol based (green) coolant, you need to do a pretty thourogh flush to get rid of it all...

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PostPosted: Thu Mar 31, 2005 9:53 am 
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What would be the best way to flush the radiator? Remove a hose or something?


Just take off the bottom radiator hose and watch your precious coolant escape (watch where you do it as most street drains go to creeks). Then jam the garden hose in the resevoir and flush it out. Place the hose back on just tight enough for it to fill up a couple of times and then let it out again.. to help get the gunk out. Just keep repeating until it gets clear.

And make sure the engine is cold when you do it too, so you're not hitting a hot motor with cold water.

Never realised how much stayed behind (macxr8 post). Interesting. Wonder if you can assist by running the rear of the car up on ramps?
Wiggle a bit more out?

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PostPosted: Thu Mar 31, 2005 9:58 am 
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the ramps are an interesting concept rob... where is this hose located on the radiator??

and.. what coolant to use (currently has some sort of green shit in there...)

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PostPosted: Thu Mar 31, 2005 9:59 am 
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Still thinking about macxr8's post: you would need a crap load of distilled water to do this properly. Or a lot of pre-boiled water from the kettle placed in a jerry can.
Still, something cheap and effective if you're very, very bored one day.
:wink:

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PostPosted: Thu Mar 31, 2005 10:03 am 
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ha maybe i could do it today then!!! im bored as...

nah mines getting a flush in a couple of months think i will leave it till then...

rob your idea about putting the back of the car up on blocks makes sense, would be good to know if it actually would help. whereabouts in the cooling system is most of this retained coolant sitting??

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PostPosted: Thu Mar 31, 2005 10:06 am 
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do you have to flush it out with distilled water???

cos distilled water doesnt come out of a hose...

or do you just do the final fill up with distilled water...

and where is this radiator hose...

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PostPosted: Thu Mar 31, 2005 10:08 am 
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I think the hose is on the bottom passenger side of the radiator. It had been about 1 yr since I did mine as it was done by the mechanics last November.
Lots of green coolants are good (as far as I know). The Tectaloy Concentrate I have used before and one in a small white can with Green and red writing (can't remember the name, but it is kind of hexy and is what the mech used).

this talk makes me want to flush with distilled and refill with distilled and concentrate though. :D
I love good, cheap-ish ideas :wink:

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PostPosted: Thu Mar 31, 2005 10:10 am 
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i am just trying to figure out which way is cheaper, go to a coolant shop and pay 150 or something or simply buy a very big kettle and pay an lovely elec bill for boiling water... :shock:

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PostPosted: Thu Mar 31, 2005 10:12 am 
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I imagine you would want to flush with distilled if you hoped to get rid of as much 'heavy water' as possible. But I never have, only filled with distilled and concentrate on occasion. but if so much stays behind, maybe you can turn that left over into mostly distilled with the aid of the refill pressure mixing it around (if you know what i mean).
I am guessing macxr8 has a bit of 'know' in regards to radiators, but I would imagine the main leftover water would be around the motor somewhere......

And stop posting so quickly :D
I finish a post and find 3 more posts.
Or maybe I type slow? :D :D

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PostPosted: Thu Mar 31, 2005 10:15 am 
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start typing faster my friend, because I am posting up a storm :twisted: :twisted:

I dont think I could be bothered flushing with distilled water. Would fill with it though, would you have to buy it? Would fresh tank water do?

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PostPosted: Thu Mar 31, 2005 10:16 am 
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i was just thinking the same thing!! damn quick posts...

you can buy distilled water at most supermarkets, never really had a look at the price..

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PostPosted: Thu Mar 31, 2005 10:18 am 
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i am just trying to figure out which way is cheaper, go to a coolant shop and pay 150 or something or simply buy a very big kettle and pay an lovely elec bill for boiling water


This way would obviously be much cheaper, 20-30 dollars of concentrate and distilled water (5-10 ltrs I guess). BUt if you took it to a radiator place, I'm sure they can use much better pressure to blow out the gunk and they would know a few tricks too. You could just use a small kettle and place it in a clean container (again - if you can be bothered). I imagine that a regularly flushed radiator with good coolant would be fine whether it had heavy or distilled water. I'm just thinking of ways to make it better - cheaply.
:wink:

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PostPosted: Thu Mar 31, 2005 10:21 am 
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Guess what I'm going tonight...

Gotta get me some coolant in my lunch break. What sort is the question.

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