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[Entwood]

IMHO the empty, fill, run for a while, empty fill run, system works best. This enables the heater matrix and engine to be fully flushed through. It took me  IIRC 10 flushes this way before I got clean water out.

[omegalord]

If i had the time i would prefer to do that way too. But am very busy just lately so if the other way works then that will have to do.  

[Entwood]

I found it quicker in some respects... drain and fill takes less than 10 minutes. drive to work, drive home, do something else while it cools down, drain & fill ( 10 mins), wife takes it shopping repeat .. so  2 drain & fills / day = 2X10 minutes = 20 minutes work ... done over 5 days ... started one sunday and it was filled up with antifreeze the next saturday  .. very little hassle and could be done with no tools just a large watering can. SWMBO moaned at having to have the heater on full ... but so what !!  

[ians]

Is there a hurry?  Given how simple it is really , might as well do it properly I would have thought..?

[omegalord]

Well,

Ive got to do the HBV (was going to today but had to go somewhere) , so was going to do a coolant change then. Just lately its finding time , as im out at 6am and back in at 9pm most nights.

Matt

[omegalord]

If i drain the coolant and then fill it up with cold water , wont it harm the engine in any way by not having antifreeze in?

Matt

[Andy B]

.........wont it harm the engine in any way by not having antifreeze in?

Matt

Eventually .... but you won't have just water in the system for very long .... comparatively speaking.  

[omegalord]

Just done the coolant change by opening the drain plug , and putting a hose in the header tank and having water constantly going in. Then turned the car over and whacked the heaters on full and just kept doing that till it run clear (about 15 mins)

Refilled with just water at the moment to check it was ok , and runs alot cooler now (was 95 + , now 92.5)

Only problem is , i noticed a bit of smoke coming from the exhaust., Not oil or blue smoke just like vapour.

Any ideas?

Matt

[TheBoy]

Spillage, or just that general dampness we have at the moment?

[Marks DTM Calib]

Yep...remember that when you burn a fossile fuel you get water as a by product.

The exhaust is big (takes quite a while to fully heat up), the air is cool (so the water condenses easier) and hence you see water vapour out the back.....