Coolant Drain and Fill Inquiry

[BumbleBoi]

Hello guys!!

I have a question about preventative maintaince on my car.

I am looking to drain the high temperature cooling circuit at the radiator hose location and put new coolant in.

Is it a requirement to vacuum fill the high temperature coolant circuit after I drain it?
Then run the built in bleed procedure.

Or can I just fill up the high temperature cooling circuit without vacuum fill and then run the bleed procedure?

Thank you!!

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[rottmore]

I didn't vac fill and my coolant temps have been stable so far. Just do both if you're worried about air bubbles.

 

[BumbleBoi]

I didn't vac fill and my coolant temps have been stable so far. Just do both if you're worried about air bubbles.

Ahhh this is good to know! That it can work without vacuum filling.

 

[Thraxbert]

Fill it and run the bleed procedure. Vac not needed.

 

[PikkaGTR]

Replaced both my hear exchanger and auxiliary coolers
Topped it off, ran coolant bleed procedure
Top off again
All good ?

 

[lucky phil]

Ahhh this is good to know! That it can work without vacuum filling.

Vacuum filling is always preferable in modern systems. Not essential but preferable. It also allows you to check the system for leaks and makes the factory bleeding procedure more effective. Vacuum fill tooling is so affordable these days you'd be silly not to.
Phil

 

[Bananamkv]

Hello guys!!

I have a question about preventative maintaince on my car.

I am looking to drain the high temperature cooling circuit at the radiator hose location and put new coolant in.

Is it a requirement to vacuum fill the high temperature coolant circuit after I drain it?
Then run the built in bleed procedure.

Or can I just fill up the high temperature cooling circuit without vacuum fill and then run the bleed procedure?

Thank you!!

draining at the tube itself doesn't clean out the system correct? that's just a partial?

 

[BumbleBoi]

draining at the tube itself doesn't clean out the system correct? that's just a partial?

I only got about half the coolant capacity of the low temp circuit out when I drained it at the radiator hose.

I also got half the coolant capacity of the high temp circuit drained as well.

A lot of the coolant remained in the radiators and heat exchangers.

 

[Bananamkv]

I only got about half the coolant capacity of the low temp circuit out when I drained it at the radiator hose.

I also got half the coolant capacity of the high temp circuit drained as well.

A lot of the coolant remained in the radiators and heat exchangers.

bummer. maybe i will just drain and flush with distilled water until it is clear. drain one last time and refill concentrated coolant to be about 50/50.

 

[BumbleBoi]

bummer. maybe i will just drain and flush with distilled water until it is clear. drain one last time and refill concentrated coolant to be about 50/50.

You might have to disconnect the lower hoses of the 2x axillary radiators that are part of the high temp circuit too just to get all the old coolant out

 

[mkvReaper]

Replaced both my hear exchanger and auxiliary coolers
Topped it off, ran coolant bleed procedure
Top off again
All good ?

i’m having some coolant issues, but how did you run the coolant bleed procedure? my mechanic’s scanner can’t run it for some reason it’s not coming up as a BMW or a Toyota on the scanner and we need to run the coolant bleed procedure

 

[Traxion]

i’m having some coolant issues, but how did you run the coolant bleed procedure? my mechanic’s scanner can’t run it for some reason it’s not coming up as a BMW or a Toyota on the scanner and we need to run the coolant bleed procedure

 

[razorlab]

i’m having some coolant issues, but how did you run the coolant bleed procedure? my mechanic’s scanner can’t run it for some reason it’s not coming up as a BMW or a Toyota on the scanner and we need to run the coolant bleed procedure

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