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MG MGF Technical - Bleeding air and the cooling system

just noticed the discussion about the need to replace coolant and bleed air from the system. I had a couple of nasty incidents of overheating this weekend driving in the centre of London (not pleasant at the best of times), if anyone saw an anthracite F with clouds of steam and a flourescent green slick behind it then that was me. Turns out that the coolant had stopped flowing to the radiator and was all being directed via the bypass hence 2 minutes at lights and BOOM (luckily caught it before it red lined) AA man bled some air and fluid from the radiator and all seems to be well again, managed the 250m drive home with a cool engine. I'm worried it may happen again though as it did this about a month ago but the problem disappeared by itself, If the thermostat valve needs replaceing how the heel do you get to it, is it behind the injection unit? Also how do I know if i've bled all the air out?
DM Wood

There is more than one bleed nipple on the MGF coolant system.

1. Radiator
2. Heater matrix (on the front bulkhead under the wiper scuttle
3. A coolant feed pipe in the engine bay (sorry but you have to remove the engine cover to get to this one.
4. an automatic jiggle valve to the right of the air iinlet plenum on the engine end of the pipe which leads to the bottom of the coolant tank.

It is important that the system is bled correctly. There are various sites which have great instructions. One of the most informative is Deiters. I'll try to find the specific address for you
tim woolcott

This is the BBS Bible for DIY mechanics

They this link for all the dope on the MGF cooling system

http://sl.wus0.com/quclk.go?rd=http://www.mgfcar.de/bleed/&res=18&crid=28ad73964f6caa54&pos=1&mr=20&qu=bleeding
tim woolcott

Thanks that would be much appreciated
DM Wood

Look again......! you were 30 seconds too late in posting your reply
tim woolcott

I printed the information on Tim's link for future reference.

However, it suggests that the various types of antifreeze should not be mixed - common sense of course. But I would think that as the technology progresses, one could take advantage of the latest type of antifreeze after flushing out the older type.

Brian

This thread was discussed on 27/05/2003

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