waiting for a
Join Date: Jan 2007
Location: Buckingham, UK
Re: GTV V6 Running Hot
Being a V6 it's quite normal for them to come up to 90*C very quickly and then should sit at 90*C for the rest of the drive. There is no problem, unless it's getting up to 100 before the fans kick in.
If you want to flush the coolant anyway:
Youve got a couple of options. You can buy some water system flush in a bottle. Follow the directions, which are usually to pour in contents, run engine, drain contents, re-fill system. I don't think they work spectacularly though.
My prefered method is to turn the interior heat to full, and run the engine, just enough so the temp neadle barely starts to move. Take the rad cap off and drop the bottom radiator hose. Re-fill with fresh water, and repeat 2 or 3 times. you should see some discolouration of the waste water in the first flush or two, and the last one should be quite clean. You can also disconnect the various parts from the thermostat (eg radiator, header tank, block) and flush them individually by running waater from a garden hose straight through them. Sometime, on the final flush, if it's been really mucky, it's good to let the engine get warm enough for the thermostat to open (you can tell when this happens as the pipes to the radiator become hot). You must be carefull though, as at all times, to avoid scolding hot water.
When your satisfied re-fill the system with de-ionised water and the additive of your choice.