Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Miggy24 on 14 December 2008, 10:42:55

Title: Changing engine coolent
Post by: Miggy24 on 14 December 2008, 10:42:55
Hi all iv been reading up on putting new engine coolent in.When it comes to flushing it all out out it says that i have to fill it up run the car then empty it out about 2-3 times.could i just put a hose pipe in the coolent bottle and leave it running till it all comes out as clear water.Also if theres anyother tips on it would be greatful :yalso would i have to bleed it or is it self bleeding  :y
Title: Re: Changing engine coolent
Post by: hotel21 on 14 December 2008, 10:50:53
System is meant to be drained via the red drain plug on the lower nearside (passenger) of the radiator.  It only unscrews partway, does not remove completely.  Draining can also be done by removing the bottom hose - much quicker!

Only about half the coolant drains by this method, the remainder still in the engine block, heater matrix etc, hence recommendation to refill with fresh water and drain a few times to dilute the mix to (virtually) plain water.

Yes, you can speed up the process by having a hosepipe feeding clean water into the header tank at the rate it drains from the rad drain tap.  Done that a couple of times myself....

When wanting to put in the antifreeze, drain the water out the rad, refill with neat antifreeze quantity, then top up with water.  Start the engine, expansion cap off, and 'burp' air out the large upper radiator hose as the engine warms.  Make sure the heater control in the car is on maximum hot.  Top up water level as required.  Replace expansion cap, let it cool overnight, and recheck the level in the morning.  Again, top up as required.  

 :y
Title: Re: Changing engine coolent
Post by: Andy B on 14 December 2008, 10:59:38
Quote
....
Yes, you can speed up the process by having a hosepipe feeding clean water into the header tank at the rate it drains from the rad drain tap.  Done that a couple of times myself....
 ......

With engine running ....  :y
Title: Re: Changing engine coolent
Post by: sneakypenguin on 23 December 2008, 12:35:22
sorry to hijack the thread, mine looks very manky so bought 10L of the red stuff from a main stealer. Is the mix ratio 50/50? so 1 5L and top up with water? many thanks
Title: Re: Changing engine coolent
Post by: ngrainqey on 23 December 2008, 12:39:55
Quote
sorry to hijack the thread, mine looks very manky so bought 10L of the red stuff from a main stealer. Is the mix ratio 50/50? so 1 5L and top up with water? many thanks

yes it's 50/50 :y
Title: Re: Changing engine coolent
Post by: sneakypenguin on 23 December 2008, 12:45:32
brilliant cheers, I'll get cracking with that, just letting it cool down a bit
Title: Re: Changing engine coolent
Post by: ians on 23 December 2008, 12:47:06
Quote
Quote
....
Yes, you can speed up the process by having a hosepipe feeding clean water into the header tank at the rate it drains from the rad drain tap.  Done that a couple of times myself....
 ......

With engine running ....  :y

I wouldn't be happy with that.  There may be parts of the block that drain and don't get the flow through and therefore risk overheating.
Title: Re: Changing engine coolent
Post by: Andy B on 23 December 2008, 12:54:00
Quote
....

I wouldn't be happy with that.  There may be parts of the block that drain and don't get the flow through and therefore risk overheating.

How? You can fill your header tank a lot faster than the drain tap can empty the block/rad. It works!  :y