Engine coolant change question
#35
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.
I know the classics don't have 2 caps however.
#37
Yep worked for me,
Must just be lucky.
#38
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.
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.
#41
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
#43
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 ?
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 ?
#47
#48
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?
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.
#49
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
How the hell do I get the airlock out if I've followed the above technique? ******* cars
#50
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.
#51
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.
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.
#52
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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