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appj62



Member Since: 07 Aug 2013
Location: Cheshire
Posts: 424

England 2006 Range Rover Vogue SE 4.2 SC V8 Buckingham Blue
Thermostat replacement 4.2 SC

Coolant was taking an age to get up to temperature and, on a steady run, was only sitting a third of the way on the gauge. Fuel consumption also seemed to be worse than the usual dreadful figure, down by 10 - 15%.
Decided to have a look at the thermostat.
Instead of draining the coolant onto the floor, I used a wet and dry vacuum cleaner sucking out coolant from the expansion tank. After removing engine cover and intake plenum, easy access to thermostat housing and loosened bolts. With the wet and dry still on, I pulled the housing off. No loss of coolant with approx 2.5 ltrs recovered to vacuum cleaner tub. Thermostat removed and noticed valve seal damaged. Replacement thermostat bought and fitted. All buttoned up with just shy of 2.5 ltrs of coolant replenished. A fair bit of bleeding carried out but suspect will take a while to completely get the air out. Well pleased to see that gauge now reading correctly.

Click image to enlarge
Note missing piece of seal was broken off by me and has not disappeared around system.
This is a far easier job than on a Fiat 500๐Ÿ˜ Previous cars:
S-Max 2007-2013 (only diesel I've had, good car but expensive when diesely bits go wrong, so what's the point?)
Galaxy 2001-2007
Mondeo Estate 1997-2001
Sierra Estate 1993-1997
Uno Turbo 1987 -1993
Fiesta 1984 - 1987
Fiat 127 1982 - 1984

Post #682602 13th Jan 2024 3:05pm
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philip1972



Member Since: 16 Jun 2017
Location: Marval 87440
Posts: 523

France 2006 Range Rover Autobiography 4.2 SC V8 Java Black

I did mine last week too!

I wish I had sucked the coolant out as I wasted 2.5 litres so thatโ€™s a great tip for the next time ๐Ÿ‘

Post #682607 13th Jan 2024 3:37pm
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