Rover 75 engine overheating despite new head gasket etc

hi there ive read the report on your car and it sounds like you have replaced every thing but the engine coolant fan switch which comes in at around 97c and turns the fan on to cool it down have this replaced and you should be ok

Im not sure the eins and outs of the repair on the headgasket but when the head was off, was the cylinder head pressure tested, x-rayed for cracks and also skimmed ? I think the garage would have looked over as far as temp sensor is concerned although your fan switch would be more of a control rather than temp. sensor. If all the above was done at time of repair it only leaves 2 possible things, your water pump (possibly the fins on the back of the pump) or the block (the bottom part of the engine) which cannot be tested and is un common but not impossible to be at fault which in that case, your engine would be needing replaced.

HI THERE SORRY TO HEAR ABOUT YOUR PROBLEM, I WOULD LIKE TO CONTRIBUTE TO YOUR THREAD, I HAD A SERIES OF PROBLEMS WITH MY V6 WHICH MAY PROVIDE A NEW DIRECTION FOR YOU TO CONSIDER, ALUMINIUM ENGINES NEED TO AVOID THERMAL SHOCK SO THE THERMOSTAT IS FITTED ON THE RETURNING WATER, THE HEATER AND THE BYPASS WATER PASS BY THE THERMOSTAT ON THERE WAY BACK TO THE ENGINE AND ONLY WHEN THE WATER REMAINS HOT ENOUGH TO CAUSE THE THERMOSTAT TO OPEN WILL IT ALLOW THE WATER TO FLOW FROM THE RADIATOR, MY PROBLEM WAS THAT I HAD RESTRICTED FLOW BACK TO THE ENGINE BECAUSE I WAS USING HOT WATER FROM THE HEATER PIPEWORK TO WARM UP MY LPG GAS EVAPORATOR, THAT RESULTED IN OVER HEATING DUE TO THE RETURN WATER AT THE THERMOSTAT BEING TO LOW TO OPEN THE STAT EVEN THOUGH THE ENGINE WAS SIMMERING/BOILING AND THE FANS WERE RUNNING DUE TO OVER HEATING, ITS OK NOW THAT THE RETURNING WATER THAT THE THERMOSTAT SAMPLES IS WARM ENOUGH TO OPEN THE THERMOSTAT. I HAVE HAD 1.8 K SERIES ENGINES IN OTHER FREELANDERS WITH SIMILAR PROBLEMS, THE FUNNY THING IS WHEN I TOOK IT TO THE DEALERSHIP FOR THEM TO LOOK AT IN THE CAR PARK WHILE IT WAS STILL HOT, IT NEVER SHOWED UP THE PROBLEM, I NOW KNOW WHY THIS ALWAYS HAPPENED, I WANTED TO MAKE SURE THE ENGINE GOT HOT SO I TURNED OFF THE HEATER THINKING IT WOULD GET HOTTER, BUT AS YOU WILL KNOW IF YOU HAVE FOLLOWED THE ABOVE, ALLOWING THE WATER BACK TO THE ENGINE WITHOUT DRAWING OFF HEAT WILL ALLOW THE THERMOSTAT TO OPEN. THIS LESSON COST ME A LOT OF TIME AND MONEY IF YOU HAVE NOT GOT SICK OF FOLLOWING THIS REPLY THEN PERHAPS IT COULD SAVE YOU SOME CASH. PS. I STILL HAVE A FREELANDER BECAUSE IF YOU KNOW WHAT MAKES THEM TICK THEY ARE GOOD MOTORS BUT THEY WILL NOT FORGIVE YOU IF YOU MAKE A MISTAKE WITH SERVICING.

if u have not got it fixed yet ask u garage to make sure u dont have an air lock in ur heatin matrix.. thats what was causin the same prob with my rover 75 after i got my headgasket fixed

Hi I am Vortash and to my dismay I too own a Rover 75 , don't get me wrong I love the car the shape and style suit me fine .
However I am on my fith gasket and feel the only viable solution to this problem is a replacment engine .
I did however find out in my circumstance, I have a block Crack caused by the overheating the reason was the ECU . Although the sensor was ok the ECU that actually reads the sensor then turns fan on was faulty , it wasn't turning the fan on . I cured this problem by fitting a Ken Lowe Thermostat on the fan direct, easy and at around £35 cheaper than a new ECU .
However in my case I was too late irepairable damage was done prior to me finding out about this problem of the ECU .
I am hoping that this will save you the same disaterous results ie: a cracked block .
Another problem is that the cylinder sleves move down after gasket replacement , and if they are below the block the block needs replacing also .
Now I know why Rover went out of Business they built the 75 , but it could have been such a different story had they fitted the Honda engine to it instead of the K series .Oh and down here in Plymouth you cant get a good 75 engine for less than £500 so with the possibility of it going again it's a bit of a gamble , thats why if anyone knows what other engine will fit my car and the gearbox I will be indebted to them for life ,, or at least the life of my poorly sick 75...lol

Regards and good luck ....Vortash

i have 2 rover 75s 1.8 turbo/1.8 non turbo your problem could be your block have your piston sleeves fell below the level of the block if so no matter how many gaskets you fit you will not cure the problem till you replace the block water gently seeps through the gasket gently then the flood gates open when the car gets hot been there on my 3rd head gasket doing the job myself with the help of townsens of stircley good luck dennis

Have you had a look at this similar problem: Drives well but every now and then loos all power for a split second then Engine light comes on and stays on for a few mins

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If I remove my thermostast so that water to circulate

Change The Radiator Filler Cap . Had The Same Thing Happen to me . . Changed EVERYTHING . Sounds Daft But Believe Me . CHANGE THE CAP