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SD1too · 6th May 2021, 16:00

Hello Brahim,

Sorry if I'm repeating questions that I've already asked you but ...

Did you renew all four 'O' rings?
After assembly did you remember to move the serrated clips on the straight pipe fully outwards?

Don't attempt to fit a larger 'O' ring to the thermostat housing. You will break it (I tried this as part of my thorough investigation of the cause of the leaks).

80 - 85 degrees is much too cool. Either the thermostat is faulty or it's not rated at 88 degrees. A genuine MG Rover thermostat is your best bet.

Simon

6th May 2021, 16:00	#5
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: 20,338 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Hello Brahim, Sorry if I'm repeating questions that I've already asked you but ... Did you renew all four 'O' rings? After assembly did you remember to move the serrated clips on the straight pipe fully outwards? Don't attempt to fit a larger 'O' ring to the thermostat housing. You will break it (I tried this as part of my thorough investigation of the cause of the leaks). 80 - 85 degrees is much too cool. Either the thermostat is faulty or it's not rated at 88 degrees. A genuine MG Rover thermostat is your best bet. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.