Sics Consolidated Faded Moderns Thread - 2006 Golf Mk5 GTI & 2004 BMW Z4 2.2

[AutoshiteBoy]

The old Rover 400/HH-R did too.

[SiC]

Had a quick check of the voltage before setting off. This is very low and suggests the battery isn't in the best of health.

Scan tool on the engine ECU matches up this dash diagnosis mode number.

6 miles up the road it was about up to temperature on the dash.

However this only corresponds to 76c actual on the coolant sensor.

Turned around and drove home. Before I got home I pulled over for another check. 11 miles in and the gauge hasn't moved.

Still 76c

Then went home, manoeuvred on the drive and sat there for a few minutes. Gauge crept up.

This corresponds to 89c.

 
To me this says the thermostat is duff?
87c is supposed to be the opening temperature and so I imagine 76c is running far too cool on a run. Certainly can't be helping fuel economy at all this cold? Even a few extra mpg would be good here!
 
After shutting off the engine I checked the battery voltage. Again this is far too low imo. Especially as this should be a surface charge. While the radio was still on and other electrical loads, to me it should be 12.4v or higher with the ignition just switched off. So I think it may need a new battery soon. Especially if I get low charge warnings on startups.

Managed to fit it on the drive with the Civic. The turning circle on this car is phenomenal for what it is. I could pull this in far easier and tighter than my TT and Boxster. 

My driveway looks like a dodgy Taxi company HQ.

[Eddie Honda]

Land Rovers have a service position for the bonnet as does Tommy's L322. Think his Jaaag does too. Mind you JLR products need them.

[SiC]

Thermostats...

BGA for £17: https://www.ebay.co.uk/itm/165904859060

Napa for £20: https://www.ebay.co.uk/itm/235121634292

Febi for £25: https://www.ebay.co.uk/itm/235135937479

Gates for £42: https://www.ebay.co.uk/itm/314936848991

Merc genuine for £41: https://www.ebay.co.uk/itm/112213093882 
(I need to double check this is correct one)

Which one would you go for? I'm thinking BGA as it's mega easy to get to even if it fails again. I don't think BGA is too much of a crap cheapy brand either. That said, genuine isn't ridiculously priced and should last the rest of the cars life.

[Eddie Honda]

Thermostats...

Which one would you go for?

Wahler 4281.87D Thermostat, coolant https://amzn.eu/d/02klsuq

They are the OEM.

[SiC]

Thermostats...

Which one would you go for?

Wahler 4281.87D Thermostat, coolant https://amzn.eu/d/02klsuq

They are the OEM.

Shame that isn't on next day prime

[Eddie Honda]

Thermostats...

Which one would you go for?

Wahler 4281.87D Thermostat, coolant https://amzn.eu/d/02klsuq

They are the OEM.

Shame that isn't on next day prime

Impatient git!

[The Reverend Bluejeans]

Febi stats are OE with the logos ground off.

[SiC]

Going Apec for £25. Mostly because I can pick it up tomorrow from my local parts shop and supports them. So hopefully will get time tomorrow evening to fit it. Bit nervous about those E-torx bolts wanting to snap off as I imagine they haven't been touched since they were put on in the factory.

[AMCrebel]

Has yours got 2 batteries? Apparently some have a small aux battery under the pollen filter.
Also might be worth a check of battery voltage at the battery (in the boot to the right of the spare wheel. It’s a long run to the front so may be a voltage drop rather than bad batt.