Anti-freeze

Anti-freeze

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Discussion

pete_w

Original Poster:

646 posts

270 months

Tuesday 3rd December 2002
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Seems winter's about to decend this weekend so need to sort out some anti-freeze.

Was wondering what the best approach to draining the system is? (any problems with trapping air?) Or should I just top up what's there and hope for the best?

peterc

386 posts

276 months

Tuesday 3rd December 2002
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Where do you live? Do you park inside or out? Does your car stand for several days between use? You may need to go for the maximum 50% mix, which means introducing 5 litres of antifreeze. This will mean pulling off one of the bottom hoses and draining down the system and re-filling.

Alternatively, have a garage do a check of the antifreeze for you and advise on the amount needed to return coolant back to optimum strength.

If in any doubt go for option one - you would not like to have to replace a block or heads cracked by frost.

Roy C

4,192 posts

291 months

Tuesday 3rd December 2002
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Seems winter's about to decend this weekend so need to sort out some anti-freeze.

If you're not sure of the age and condition of the coolant, drain it (bottom rad hose) and refill. I use about 40% antifreeze to 60% water. It's also a good time to check the condition of the radiator and hoses.


Was wondering what the best approach to draining the system is? (any problems with trapping air?) Or should I just top up what's there and hope for the best?

Caps off and release bottom hose.
V6 S series cooling system does tend to get airlocks when refilling, so you'll need a bit of patience.

pete_w

Original Poster:

646 posts

270 months

Thursday 5th December 2002
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V6 S series cooling system does tend to get airlocks when refilling, so you'll need a bit of patience.



-fecking hell you're not joking are you! Took about an hour and a half of arsing about to get the coolant back in the system after fully draining. Tried the suggestions in the bible, but didn't seem to speed things up significantly.

johns3c

30 posts

271 months

Friday 6th December 2002
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I second the air-lock experience on S-series cars: On my TVR S3C i find that after draining and refilling the system, it is necessary to top up the swirl tank again after taking the car for a run. Each time with about 1-2 deciliters, and at least 3-4 times before the level has settled.
Cheers , John

pete_w

Original Poster:

646 posts

270 months

Friday 6th December 2002
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-discovered that you could fill the swirl tank, run the engine for about 20s, then switch off and re-fill.

Running the engine for 2-3 minutes between fillings as recommended made no difference whatsoever to the amount of fluid you could get in at any one time. It seems to suck in a fixed amount immediately after start-up and that's it.

Think the major hang-up is around the cabin heater matrix and associated piping. Didn't find any shortcuts to the problem...patience is the key. Just glad I didn't get a mechanic to sort it out. 10 bar anti-freeze, 90 bar labour