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SD1too · 1st November 2019, 18:26

The bottom hose (the one containing the bleed screw) should always feel hot. When it's cold, the thermostat hasn't opened. It sounds as if the K-Seal

is interfering with the thermostat operation.

There's nothing for it but repeated flushes. MGJohn adds Holts Speedflush but drives with it still in the cooling system for a few miles before draining. He swears by this method.

Simon

1st November 2019, 18:26	#51
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,344 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	The bottom hose (the one containing the bleed screw) should always feel hot. When it's cold, the thermostat hasn't opened. It sounds as if the K-Seal is interfering with the thermostat operation. There's nothing for it but repeated flushes. MGJohn adds Holts Speedflush but drives with it still in the cooling system for a few miles before draining. He swears by this method. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.