Thanks pal, I had a civic 2.2 diesel ictdi for 4 years and sold it 7 weeks ago as the clutch was slipping and the cost of replacing it with a new clutch kit and flywheel and mechanic labour was €2200 euros while the civic was a 2009 car worth only 3250 euros if perfect so i cudnt see the sense in putting this amount of money into it so i went and got a 2010 Accord 2.2 diesel dtec engine EX GT with all the extras, leather seats, GT body kit and its is immaculate condition. After 4 weeks of loving it, one morning late November 2023 driving to college in Dublin, 7am and temperature -3°C ,after 15 minutes driving nó heat inside the car for heater. Got to college and checked to see if coolant level was low and might be the reason for nó heat, as this was the reason my Nissan Navara wudnt blow hot air a few years ago, I topped up coolant and heat came back, so i was going to check 8f this was the issue with the Accord, to my horror thick sludge in the coolant expansion tank. I was gutted. I got home and flushed the coolant system 4 times, each time with a new bottle of rad flush. Got it cleaned out and heat came back but im flushing now every 2nd day until the oil cooler gasket set arrives in honda dealership. I purchased a 2nd hand oil cooler. Please got its only gaskets or oil cooler. I love the car. Also I have to fit a replacement abs pump unit aswell which i got. Abs and vsa lights on the dashboard. The solder on the circuit board on the abs pump unit is really bad quality so this is the cause. Ill replace it with the one I have and then repair the one i take off. Anyway im new on the forum and delighted to be here and have access to all the helpful information from all you guys.