The temp. gauge hasn't risen above halfway since, despite some hard and motorway driving, which is great, but the car seems to take a bit longer than before to reach normal temp. It could mean the thermostat is slightly the wrong temperature range, but both the one I removed and the new one are confirmed 80 CEL, so I think it's likely the car now has a more average heat up time and I'm just not used to it!
PROCESS:
BMW thermostat units are built into tube-housings so replacing them couldn't be simpler, simple pop the hose clamps off each pipe and it pulls straight out.
1. Use a flathead screwdriver to loosen the jubilee-clip holding the lower hose in place on the thermostat, pull the hose clear and allow the coolant to drain from the engine into a container.
2. Loosen the jubilee clip to the top hose on the thermostat and pull the hose clear.
3. Loosen the jubilee clip to the hose on the nearside of the thermostat coming from the coolant-return and pull the thermostat unit clear of the hose.
4. Reverse the process with you're new thermostat.
5. Re-fill the radiator with 3.5-5 litres of coolant. ** It's probably best to back flush the engine and radiator while the hoses are off and the system is drained.
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