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Guide: Replacing ThermostatViews : 3803 Replies : 0Users Viewing This Thread : |
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Mar 22nd, 2011, 15:00 | #1 |
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Guide: Replacing Thermostat
Engines: 1.6/1.8/2.0 Petrol
Symptoms: Poor MPG, Low engine temp, poor heat output on heater. Time required: 15 Mins Tools required: Torx driver (sorry forget what size..) NOTE: Ensure engine is cool before attempting or risk of scalding. Engine temp should be around 90°C anything below this indicates a fault. My car was running at 78°C, I have seen some worse and some better. For a while mine ran at 85°C and I didn't believe the thermostat to be at fault. I was wrong, 960KG was right (I'm going way back here..). Follow top radiator hose to locate thermostat cover and remove the 2 torx bolts (you will lose about a cup full of coolant): Move hose out of the way: Remove old thermostat: Ensure new thermostat is correct and ensure it comes with O ring: Fit new o-ring onto new thermostat: Install new thermostat: Retighten thermostat cover torx bolts: Top up any lost coolant. Coming into Spring summer I just topped up with distilled water. Any other time I'd replace coolant. Job Done Put kettle on. Maximum temp car achieved on tickover with old thermostat: Maximum temp car achieved on tickover with new thermostat: The difference is significant! I haven't been for a drive yet, but I bet the MPG is improved massively! I have to do a 200km drive to Helsinki on Thursday, a good MPG test. With faulty thermostat I got around 37 MPG on motorway runs, I will report back Thursdays finding and see, once and for all just how much a thermostat affects MPG. Edit: Original thread
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Last edited by cumbrianmale; Nov 22nd, 2012 at 13:28. Reason: link back |
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