Draining coolant completely - Alfa Romeo Forum
You are currently unregistered, register for more features.    
 
Thread Tools
(Post Link) post #1 of 8 Old 01-04-12 Thread Starter
pkr
Status: Planning the next project ...
AO Silver Member
 
Join Date: May 2007
Location: United Kingdom
County: Bedfordshire
Posts: 4,622
Draining coolant completely

Anybody got any tips on draining the coolant from a TS as completely as possible?

The manual only says to disconnect the bottom hose but that will leave a fair amount of water in the block.

At the moment mine has fresh water in and I want to put the antifreeze back in. However with the residual water in the block, the antifreeze will become too dilute.

I did think about putting an airline on a heater hose with the bottom hose still disconnected. I'd probably have to clamp off the top hose as well.

Better ideas?
pkr is offline  
Sponsored Links
Advertisement
 
Status: -
AO Member
 
Join Date: Oct 2008
Location: United Kingdom
County: Shropshire
Posts: 112

Member car:

Phase 2 145 QV

Hello,

Here's what I did when I changed my coolant from blue to pink completely flushed the system

1. Drain old coolant as you have done by disconnecting bottom rad hose
2. Reconnect bottom rad hose.
3. Refill at header tank with clean water and keep draining until water runs clear.

hope that helps
aamrit is offline  
Status: -
AO Member
 
gammakeith's Avatar
 
Join Date: Nov 2010
Location: United Kingdom
County: Nottinghamshire
Posts: 822

Member car:

156 JTD 2.4 20V

The easiest is to add the right amount of neat antifreeze to the radiator to start with. Then just add water until it hits the mark. Much easier than mixing in a jug!

Keith
gammakeith is offline  
(Post Link) post #4 of 8 Old 01-04-12 Thread Starter
pkr
Status: Planning the next project ...
AO Silver Member
 
Join Date: May 2007
Location: United Kingdom
County: Bedfordshire
Posts: 4,622
Sorry I should have given some background. I recently had the head off and drained the coolant. As the coolant is fairly new, I want to reuse it as there's nothing really wrong with it.
pkr is offline  
Grahameo
Status: - Update
Guest
 
Posts: n/a
Quote:
Originally Posted by pkr View Post
Sorry I should have given some background. I recently had the head off and drained the coolant. As the coolant is fairly new, I want to reuse it as there's nothing really wrong with it.
Personally, as a time served mechanic I would never contempate re-using drained coolant,

Imagine a filtered coffee pot all the deposits of grindings always end up at the bottom of the pot, so the good stuff is at the top... Same with your coolant when the engine is off, you end up dislodging bigger particles that have settled in the bottom of the radiator housing and if you re-introduce it things like jacket channels, thermostat and pump, it can end up getting the gritty stuff in places where it can do some harm to otherwise healthy parts
Always use fresh mate, it's false economy otherwise
 
Status: -
AO Platinum Member
 
Ralf S.'s Avatar
 
Join Date: Feb 2002
Location: The land that Time forgot
Posts: 13,073
To completely flush your old coolant out you can refill the system with plain water, run the engine for a bit and then drain it. Do that once or twice and all the old coolant will be out of there.

If you're worried about the residual water in the block diluting the new stuff.. just mix up your antifreeze 55:45 antifreeze to water instead of 50:50.

It won't make a huge difference if you have a bit of plain water somewhere in the block.. but if you have an OCD fetish, just crank the engine over a few turns with the bottom hose off - the water pump will regurgitate what's left. To drain the heater is a different story involving removing bits of lower dashboard... I'd really not worry about that bit.. just use 55%..

You can re-use old anti-freeze but it's got to be spotless to be worthwhile and you have to remove all the bits of dirt and grit that you dropped into the basin you drained it into...

Use a bit of stockinette in your funnel to act as a filter. Stick the funnel into an empty plastic water bottle and then decant the antifreeze through the funnel (i.e don't pour in the whole lot.. let the "bits" settle in the bottom of the basin and leave them there with a bit of the coolant... the stockinette is just to catch any bits that fall in as you decant, not to filter the antifreeze.. ).

If you have any bits in the bottle, get a new bit of stockinette and then repeat into another plastic bottle. You'll gradually end up with antifreeze with no pieces in it. Stick that into the car.


Ralf S.

No bullets for Chaingun..

Last edited by Ralf S.; 02-04-12 at 15:25.
Ralf S. is offline  
(Post Link) post #7 of 8 Old 02-04-12 Thread Starter
pkr
Status: Planning the next project ...
AO Silver Member
 
Join Date: May 2007
Location: United Kingdom
County: Bedfordshire
Posts: 4,622
Quote:
Originally Posted by Grahameo View Post
Imagine a filtered coffee pot all the deposits of grindings always end up at the bottom of the pot
Interesting you should mention that as an analogy. I was going to filter the coolant through a coffee filter before sticking it back in.

The thing is, I only put this red antifreeze in last year and I hate wasting things
pkr is offline  
(Post Link) post #8 of 8 Old 02-04-12 Thread Starter
pkr
Status: Planning the next project ...
AO Silver Member
 
Join Date: May 2007
Location: United Kingdom
County: Bedfordshire
Posts: 4,622
Stockingette - good thinking. I was going to use a coffee filter but that may be a bit too slow!

As to the probelm of plain water in the block, I think I have an alternative plan anyway.

I'll measure the water I drain from the GTV and use that to calculate the plain water in the block. I'll then add an equivalent volume of antifreeze for 50%. I'll then top up to full with the 50% mixture I drained.

As my wife's car is due a coolant change I'll flush the 156 as well and repeat the process ( bearing in mind the lower coolant capacity of the JTS ) topping up with what I have left that I drained out of my GTV. Probably not the best for the 156 but it is a reasonable solution.

Thanks all.
pkr is offline  
Reply

Go Back   Alfa Romeo Forum > Supported Alfa Romeo Models > Technical & Vehicle Assistance > Engines (TS, JTS, JTD & V6)

Tags
completely , coolant , draining

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
gta coolant resevoir replacement ohwell Alfa GTA 11 22-12-09 19:44

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome