Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 10th January 2019, 18:11   #1
respace
Avid contributor
 
Rover 75

Join Date: May 2014
Location: Dorchester
Posts: 110
Thanks: 14
Thanked 15 Times in 13 Posts
Default Operating temperature

Until I replaced the radiator my car ran at 9 o'clock on the gauge which i assume is 90 degrees, since replacing it it seldom gets above half past seven. Do I need be concerned?
respace is offline   Reply With Quote
Old 10th January 2019, 18:16   #2
Mickyboy
SERVICING AND DEALER DIAGNOSTICS
 
Mickyboy's Avatar
 
MG ZT CDTI 135 + & MGZT CDTI AUTO 160 & ROVER 75 TOURER CDTI 160 TROPHY YELLOW

Join Date: Aug 2013
Location: Hernebay
Posts: 4,331
Thanks: 818
Thanked 2,414 Times in 1,141 Posts
Default

Temperature gauge is about as useful as a chocolate teapot it will read normal anywhere from around 75° - 115° On a diesel, correct operating temperature should be 88° this can be checked using OBD diagnostics mode 19 section 7, If it’s not reaching the 9 o’clock position then it’s not running at the correct operating temperature it’s running cool, not great for fuel economy etc
Mick
__________________
[SIGPIC][/SIGPIC]
T4 Owner
Jobs done : new UBP, Spy hole mod, Rear hub(wheel bearing),plenum cleaned and emptied, Inline thermostat fitted,Full service, In car Digital tv/DVD Bluetooth Satnav etc, Replaced UBP, Restored headlights,Fixed airbag connection.replaced HP pump,replaced rear light seals,changed intercooler O rings.

Jobs to do: ,replace drivers lock,.
[/SIZE]
Mickyboy is offline   Reply With Quote
Old 10th January 2019, 18:16   #3
suzublu
This is my second home
 
suzublu's Avatar
 
rover 75 1.8 vvc club se wedgwood blue

Join Date: Aug 2009
Location: Seaton Carew
Posts: 26,880
Thanks: 65
Thanked 7,142 Times in 4,642 Posts
Default

Run the obd for the correct temperature https://the75andztclub.co.uk/forum/s...ad.php?t=55585
19 & 7 are the relevant numbers. Sounds like the thermostat may be faulty
suzublu is offline   Reply With Quote
Old 10th January 2019, 18:54   #4
T-Cut
This is my second home
 
Rover75 and Mreg Corsa.

Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,751
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
Default

The new radiator exacerbating an old problem.
Time for an in-line stat I'd suggest.

TC

Last edited by T-Cut; 10th January 2019 at 18:58..
T-Cut is offline   Reply With Quote
Old 10th January 2019, 20:10   #5
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,262
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Quote:
Originally Posted by respace View Post
... my car ran at 9 o'clock on the gauge which i assume is 90 degrees ...
Rob,

The nine o' clock temperature gauge position doesn't mean 90 degrees, it means anywhere between 75 and 115 degrees. Use the instrument pack diagnostics as suzublu recommends to discover the actual temperature.

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 10th January 2019, 22:06   #6
COLVERT
This is my second home
 
R75 Saloon.

Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
Thanks: 3,851
Thanked 2,167 Times in 1,816 Posts
Default

Quote:
Originally Posted by respace View Post
Until I replaced the radiator my car ran at 9 o'clock on the gauge which i assume is 90 degrees, since replacing it it seldom gets above half past seven. Do I need be concerned?
Yes.---You need to fit a new thermostat.---
COLVERT is offline   Reply With Quote
Old 11th January 2019, 16:32   #7
respace
Avid contributor
 
Rover 75

Join Date: May 2014
Location: Dorchester
Posts: 110
Thanks: 14
Thanked 15 Times in 13 Posts
Default

Thanks everyone, looks like i need a new thermostat! The in-line route looks the way to go, does anyone know how much they are/where i can get one?
respace is offline   Reply With Quote
Old 11th January 2019, 18:45   #8
T-Cut
This is my second home
 
Rover75 and Mreg Corsa.

Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,751
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
Default

Quote:
Originally Posted by respace View Post
The in-line route looks the way to go, does anyone know how much they are/where i can get one?

You need a Renault 5 thermostat rated 88°C or better 89°C
Best brands to get are Wahler, FirstLine or Gates. They're watertight which is important.

eBay gives a good chance of getting one of the above for around a tenner.

TC
T-Cut is offline   Reply With Quote
Old 11th January 2019, 19:14   #9
Mac_rouser
Loves to post
 
Rover 75 Saloon and 75 Tourer

Join Date: Apr 2008
Location: Leeds
Posts: 285
Thanks: 145
Thanked 69 Times in 34 Posts
Default

Quote:
Originally Posted by respace View Post
Thanks everyone, looks like i need a new thermostat! The in-line route looks the way to go, does anyone know how much they are/where i can get one?

I also need to replace mine .... found one here.

https://www.dmgrs.co.uk/products/rov...tat-89-degrees
__________________
Take care
mac
Rover 75 a classic
Mac_rouser is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 10:52.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd