Sigh... thermostat AGAIN...?

hogweed · 28th December 2017, 15:07

Had it replaced about 3 years ago. Noticed my fuel consumption being up since I moved back to N Ireland a few months ago, and put it down to the colder weather, but I checked my actual temperature (using the dash display rather than the gauge, which is sitting at 9:00), and it’s struggling to hit 80 – mostly sitting around 77, even after a long drive.

Would you say it’s gone again?

Thanks

75driver · 28th December 2017, 15:56

Yes roger, I'd say it's gone.
I know it's a good bit cooler here over the past few days, but after a 10 mile run she should be up to temp.
Mine usually fluctuates between 82-87 at the moment.(saloon).

Sent from my iPhone using Tapatalk

Vossy · 28th December 2017, 16:00

I have just noticed the same thing, I had a new version (3) oem stat fitted and it has lasted about 2½ years, motorway speeds it sits around 82 - 84 but straight back to 80ish when I stop, I have a V3 one from Mat (DMGRS) to fit as soon as I can.

hogweed · 28th December 2017, 16:39

As the ventriloquist's dummy said, Gollocks.

Oh well, she's going in week after next for complete new rear brakes - guess I'll just have to add this to the list

Comfortably Numb · 28th December 2017, 17:10

At least they fail in the open position! Unlike some VAG stupid designs! For me, its about how quickly I get a warm cabin, especially in current weather.

hogweed · 28th December 2017, 19:09

73 after 10 miles on the motorway.

Diagnosis confirmed I guess

suzublu · 28th December 2017, 19:17

Mine's still on the original

16 year old

MatiNitro · 28th December 2017, 19:18

I had the same problem in my CDTi, engine temperature maximum 73-74, no matters how long and fast I've been driving. I fitted last time Renault thermostat, now I don't have problem with temperature. Cheap and successful option.

Forestgreen · 28th December 2017, 21:19

My 2.5 was registering around 65-70oC in the freezing weather last week, yes I think it must be stuck open.

Apart from the cabin taking an age to warm up, are there any reasons to get it fixed as a priority? I haven't seen much effect on fuel consumption and it must have been like this for a good year (not all that long after replacing the previous thermostat due to the inevitable leak I might add) so the main annoyance is the cold cabin (especially as my heated seats aren't heating at the moment - presumably a fuse but haven't had the time to investigate that either).

rustymotor · 29th December 2017, 07:06

Thought the party line was to use the stat in the top hose?

28th December 2017, 15:07	#1
hogweed I really should get out more....... Vauxhall Insignia CDTi; MG TF 135 Join Date: Jan 2010 Location: Norn Iron Posts: 2,958 Thanks: 942 Thanked 378 Times in 297 Posts	Sigh... thermostat AGAIN...? Had it replaced about 3 years ago. Noticed my fuel consumption being up since I moved back to N Ireland a few months ago, and put it down to the colder weather, but I checked my actual temperature (using the dash display rather than the gauge, which is sitting at 9:00), and it’s struggling to hit 80 – mostly sitting around 77, even after a long drive. Would you say it’s gone again? Thanks __________________ Past cars: MGB GT; Escort 1300 Sport; Vauxhall VX4/90; Marina Coupe TC; Celica ST (1972); Montego Turbo; Astra GTE 16V; Astra GSI 16V; Golf GTI 16V (Mk II); Sierra XR4x4 Estate; BMW 325i (E30); BMW M3 3.0; BMW M3 3.2 Evo. Left some of the more embarrassing ones out. And about 30 motorbikes.

28th December 2017, 15:56	#2
75driver Posted a thing or two Rover 75 saloon, manual. Rover 75 Tourer, Auto. Join Date: Jan 2013 Location: Newry Posts: 1,781 Thanks: 574 Thanked 443 Times in 371 Posts	Yes roger, I'd say it's gone. I know it's a good bit cooler here over the past few days, but after a 10 mile run she should be up to temp. Mine usually fluctuates between 82-87 at the moment.(saloon). Sent from my iPhone using Tapatalk __________________ 2006 75 Contemporary SE diesel manual (#1) 2003 75T Connoisseur SE diesel auto (For Comfort) 2005 75 Connoisseur SE diesel auto (Marmite duotone ) 2006 75 Connoisseur SE diesel auto (The last one?) 2009 E220 (For a change) 2018 L200 (For Big & Heavy Things) 1976 W114 250 Manual (For Sundays)

28th December 2017, 16:39	#4
hogweed I really should get out more....... Vauxhall Insignia CDTi; MG TF 135 Join Date: Jan 2010 Location: Norn Iron Posts: 2,958 Thanks: 942 Thanked 378 Times in 297 Posts	As the ventriloquist's dummy said, Gollocks. Oh well, she's going in week after next for complete new rear brakes - guess I'll just have to add this to the list __________________ Past cars: MGB GT; Escort 1300 Sport; Vauxhall VX4/90; Marina Coupe TC; Celica ST (1972); Montego Turbo; Astra GTE 16V; Astra GSI 16V; Golf GTI 16V (Mk II); Sierra XR4x4 Estate; BMW 325i (E30); BMW M3 3.0; BMW M3 3.2 Evo. Left some of the more embarrassing ones out. And about 30 motorbikes.

28th December 2017, 19:09	#6
hogweed I really should get out more....... Vauxhall Insignia CDTi; MG TF 135 Join Date: Jan 2010 Location: Norn Iron Posts: 2,958 Thanks: 942 Thanked 378 Times in 297 Posts	73 after 10 miles on the motorway. Diagnosis confirmed I guess __________________ Past cars: MGB GT; Escort 1300 Sport; Vauxhall VX4/90; Marina Coupe TC; Celica ST (1972); Montego Turbo; Astra GTE 16V; Astra GSI 16V; Golf GTI 16V (Mk II); Sierra XR4x4 Estate; BMW 325i (E30); BMW M3 3.0; BMW M3 3.2 Evo. Left some of the more embarrassing ones out. And about 30 motorbikes.

28th December 2017, 16:00	#3
Vossy Why? ... MG ZT+ Cdti Auto saloon. Join Date: Jul 2014 Location: Blockeswich, South Staffs Posts: 1,548 Thanks: 173 Thanked 483 Times in 330 Posts	I have just noticed the same thing, I had a new version (3) oem stat fitted and it has lasted about 2½ years, motorway speeds it sits around 82 - 84 but straight back to 80ish when I stop, I have a V3 one from Mat (DMGRS) to fit as soon as I can.

28th December 2017, 17:10	#5
Comfortably Numb Posted a thing or two Rover 75 Saloon Join Date: Dec 2017 Location: Penrith Posts: 1,336 Thanks: 165 Thanked 303 Times in 241 Posts	At least they fail in the open position! Unlike some VAG stupid designs! For me, its about how quickly I get a warm cabin, especially in current weather.

28th December 2017, 19:17	#7
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,912 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	Mine's still on the original 16 year old

28th December 2017, 19:18	#8
MatiNitro Regular poster Rover 75 Saloon Join Date: Oct 2017 Location: London Posts: 68 Thanks: 0 Thanked 8 Times in 6 Posts	I had the same problem in my CDTi, engine temperature maximum 73-74, no matters how long and fast I've been driving. I fitted last time Renault thermostat, now I don't have problem with temperature. Cheap and successful option.

28th December 2017, 21:19	#9
Forestgreen Gets stuck in Rover 75 Connoisseur SE 2.5 V6 saloon Join Date: Dec 2011 Location: Birmingham Posts: 770 Thanks: 47 Thanked 105 Times in 54 Posts	My 2.5 was registering around 65-70oC in the freezing weather last week, yes I think it must be stuck open. Apart from the cabin taking an age to warm up, are there any reasons to get it fixed as a priority? I haven't seen much effect on fuel consumption and it must have been like this for a good year (not all that long after replacing the previous thermostat due to the inevitable leak I might add) so the main annoyance is the cold cabin (especially as my heated seats aren't heating at the moment - presumably a fuse but haven't had the time to investigate that either).

29th December 2017, 07:06	#10
rustymotor Posted a thing or two Rover 75 Tourer Join Date: May 2017 Location: Hull Posts: 1,848 Thanks: 216 Thanked 432 Times in 340 Posts	Thought the party line was to use the stat in the top hose?