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donc · 13th November 2020, 20:41

the product available at any car accessory shop is a radiator and matrix flush and cost about £8 i think. Simply add to the cooling system, after having let some coolant out, then drive for a few miles in low gear so it circulates well. When it's cooled off disconnect the inlet and outlet pipes to the matrix and use a hospipe to reverse flush the system. I was lucky that this cleared out the gunge that was part blocking the matrix. I gather that doesn't always work unfortunately and the cure then might be a new matrix.

13th November 2020, 20:41	#5
donc Avid contributor Rover 75 Join Date: Sep 2018 Location: Kirk Ella Posts: 141 Thanks: 9 Thanked 43 Times in 14 Posts	Flushed with success the product available at any car accessory shop is a radiator and matrix flush and cost about £8 i think. Simply add to the cooling system, after having let some coolant out, then drive for a few miles in low gear so it circulates well. When it's cooled off disconnect the inlet and outlet pipes to the matrix and use a hospipe to reverse flush the system. I was lucky that this cleared out the gunge that was part blocking the matrix. I gather that doesn't always work unfortunately and the cure then might be a new matrix.