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Old 27 April 2016 | 04:15 PM
  #31  
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From: JDM MY97 Type R - 2.1 Stroker
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Originally Posted by alcazar
Remove the rearmost pipe from the metal header tank on top of thengine,
Are you referring to the hose with the red arrow pointing to it in the image below?

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Where does that hose connect to?
Old 27 April 2016 | 05:41 PM
  #32  
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From: Rl'yeh
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Yes. It goes to the base of the engine/turbo, so you are filling from the bottom up.
Old 27 April 2016 | 06:53 PM
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From: JDM MY97 Type R - 2.1 Stroker
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Originally Posted by alcazar
Yes. It goes to the base of the engine/turbo, so you are filling from the bottom up.
That's ideal. So the idea is that any air in the system is pushed up and out through the header tank right?

So slowly does it!
Old 28 April 2016 | 10:13 AM
  #34  
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From: Rl'yeh
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Yep, stuff a funnel down the pipe that came off that spigot, pour in coolant (mixed 50/50), from a jug, don't let it gurgle or burp. It took me about 15 minutes to fill mine.
Old 28 April 2016 | 05:04 PM
  #35  
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I've found on a Newage with 2 caps you can just fill through the rad, then the header tank, run until the fans come on, any air will burp out of the open header tank, top up as required and fit the cap.

I know the classics don't have 2 caps however.
Old 28 April 2016 | 07:00 PM
  #36  
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From: Rl'yeh
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I'd still do it my way..I know it works 100%.
Old 29 April 2016 | 09:46 AM
  #37  
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Originally Posted by ScottyPPP
I've found on a Newage with 2 caps you can just fill through the rad, then the header tank, run until the fans come on, any air will burp out of the open header tank, top up as required and fit the cap.

I know the classics don't have 2 caps however.

Yep worked for me,

Must just be lucky.
Old 15 January 2017 | 06:09 PM
  #38  
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Originally Posted by alcazar
Yes, drain from the rad drain plug, or remove bottom hose. Set heaters in car to hot while it drains, leave them there.

Inspect rad for the core turning to dust, if it's bad, replace it, internet ones are fine.

Use a decent quality anti-freeze, as at a motor factor for one suitable for an alloy engine and having anti-corrosion added. Dilution is usually 50/50.

Replace plug or bottom hose!!!

Remove the rearmost pipe from the metal header tank on top of thengine, remove the cap from said tank. Jam a funnel down that hose and fill SLOWLY via the funnel, do NOT allow it to gulp.

Watch for the header tank to fill, once it reaches the top, remove funnel and replace that pipe.

Now, with cap still off, start engine and allow to warm up until fan comes on. Watch for bubbles, top up or mop up as necessary.

Once fans start, switch off, replace cap, drive round block, leave to cool.
When cool, remove cap, check level, top up if necessary, replace cap, job's a good'un.

It takes a while, but bear in mind, THERE IS NO KNOWN WAY TO BLEED THE SYSTEM IF YOU AIRLOCK IT.
So if I understand everything right, I should only fill the coolant into the cooling hose of the turbo and take off the cap of the metal tank next to the engine and check the level in this metal tank. All other caps (radiator & plastic tank) stay on and I don't have to check the level in all the other tanks?
Old 16 January 2017 | 01:59 PM
  #39  
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From: Rl'yeh
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Correct. Fill slowly, don't allow it to "gulp".
Old 16 January 2017 | 05:39 PM
  #40  
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From: Straubing
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Thanks for your answer
Old 07 January 2018 | 02:13 PM
  #41  
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From: Paris
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Originally Posted by alcazar
Remove the rearmost pipe from the metal header tank on top of thengine, remove the cap from said tank. Jam a funnel down that hose and fill SLOWLY via the funnel, do NOT allow it to gulp.
Hi everyone
I would please like to clarify something. Must I put the funnel into the removed hose (the rearmost pipe from the metal header tank) or Inside the metal header tank through the hole now visible because the cap was removed ?

TIA
Old 07 January 2018 | 03:13 PM
  #42  
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Funnel in hose not tank
Old 07 January 2018 | 04:37 PM
  #43  
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From: Paris
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Many thanks
i suppose that I don't need to remove thé big hose on the top of the rad in order to push the bubble out ?
And just a question : what are the differences with the procedure that requires a specific funnel with a cap that we need to plugg onto the metal tank ?
Old 07 January 2018 | 07:24 PM
  #44  
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From: Rl'yeh
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No, leave the big hose alone.

As for specific funnel, just a trick method of doing it which may NOT work for Subarus. Do it as above
Old 07 January 2018 | 09:15 PM
  #45  
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Thanks à lot. It seems to me that I succeed while doing it. I had to wait for the second launch of the fan. I will try to drive tomorrow. But thanks to this topic I think it is Ok.
Old 11 July 2019 | 01:02 PM
  #46  
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So the Radiator will fill as u Fill trough this Hose Aswell?..........Sorry If it's a Dumb Question, I'm A Newbie
Old 11 July 2019 | 01:20 PM
  #47  
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Originally Posted by STI2041
So the Radiator will fill as u Fill trough this Hose Aswell?..........Sorry If it's a Dumb Question, I'm A Newbie
Yes, because you are filling at the highest point; slow and steady, no glugging is the trick
Old 31 December 2020 | 01:51 PM
  #48  
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From: Exeter
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Ola,

Reviving this once more as I'm having issues with getting hot air through fans after a coolant change (2.5 Hatch STi) ..

I bought this snazzy fill bucket which I used first time but now replaced I'm having issues with no hot air coming into car through blowers.



To clarify, Alcazar is saying to fill the coolant via this pipe on the header tank and then a funnel connected like this?







Last edited by prodrive.greeny; 31 December 2020 at 01:53 PM.
Old 31 December 2020 | 03:06 PM
  #49  
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From: Exeter
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So I filled the coolant up using the above method. Took 5L of coolant until filled the header. Followed Alcazar's method of then leaving the header cap off and running engine until fans came on. Went for a drive and watched temp gauge climb to 103 degrees which is further than normal. Shat my pants and came home and currently leaving to cool. There's clearly an air lock. Can't be HG as never had any issues before changing the coolant.

How the hell do I get the airlock out if I've followed the above technique? ******* cars

Old 31 December 2020 | 04:02 PM
  #50  
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From: planet subaru
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hi m8, just try again and go slow with it. i always use this method and sometimes it takes a few attempts as i must have let it glug and got air in. drop the coolant into your bucket and re use again.
Old 31 December 2020 | 05:52 PM
  #51  
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All sorted. What a B1tch though!

Third flush / refill attempt.

If it helps, the final and successful attempt I refilled the system via the header pipe as pictured above using a small filter and then the jazzy refill bucket in the header tank (also pictured above).

Once warming up, I kept priming the top rad hose every now and again to force the bubbles out.

I didn't use the radiator filler at all which was kept closed at all times.

Lesson learned, keep persevering.
Old 01 January 2021 | 05:54 PM
  #52  
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glad you got there in the end m8! it is a good method when done correctly. the only reservation i can see with this method is if you have an old or original radiator it might have flakes of rust which have settled to the bottom of the radiator so when you back fill from the bottom these rust flakes would be disturbed an float up again then sink back down and maybe cause a blockage? i dont know if alcazar or any of the others who came up with this method ever discussed this but its something to keep in mind.
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