When i got the car it was apparent that the cylinder head coolant housing had been leaking at some point and had been replaced at a later date as i think someone had just kept adding water with no anti-freeze or had used a sealing addative like k-seal as the coolant tank was full of a rusty brown paste type substance.
so i drained the sytem and used a 40/60 mix G101/water and ran the car for two days then drained and filled with a light mix of anti-freeze and water then ran for a day then drained and added the correct amount of water/anti-freeze.
Id say its still cleaning it now as some bubbles remain in the coolant tank now and again but its worked a treat but possibly could benefit from a new tank but atleast it wont go south for some time after doing this flush.
I did also remove the coolant tank and swished it round with some pure G101 to remove the gunk from the level sensor recess and behind it.
so i drained the sytem and used a 40/60 mix G101/water and ran the car for two days then drained and filled with a light mix of anti-freeze and water then ran for a day then drained and added the correct amount of water/anti-freeze.
Id say its still cleaning it now as some bubbles remain in the coolant tank now and again but its worked a treat but possibly could benefit from a new tank but atleast it wont go south for some time after doing this flush.
I did also remove the coolant tank and swished it round with some pure G101 to remove the gunk from the level sensor recess and behind it.