The 75 and ZT Owners Club Forums - View Single Post - MG ZTT CDti

T-Cut · 31st October 2019, 10:37

As a diesel, it may well be suffering the widespread problem of the underperforming thermostat. It's very common and has filled reams of forum space over the years. Of course, you won't get any heating if the coolant's not hot enough, so I'd suggest you first check the actual running temperaure. Don't rely on the temperature gauge to tell to anything. The pointer at 'normal' means very little. If it runs below the 'normal' point, you know it's below 75C, which is pretty poor for everything, heating, fuel economy and engine wear. So, run the Trip Screen Diagnostic test while driving normally and tell us the result. You want it near 90C.

HowTo (see section 7): https://www.the75andztclub.co.uk/for...ad.php?t=55585

Diesel owners with the low temperature running issue typically fit the in-line thermostat modification with good results. Choose the stat carefully though using advice on here.

TC

31st October 2019, 10:37	#5
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	As a diesel, it may well be suffering the widespread problem of the underperforming thermostat. It's very common and has filled reams of forum space over the years. Of course, you won't get any heating if the coolant's not hot enough, so I'd suggest you first check the actual running temperaure. Don't rely on the temperature gauge to tell to anything. The pointer at 'normal' means very little. If it runs below the 'normal' point, you know it's below 75C, which is pretty poor for everything, heating, fuel economy and engine wear. So, run the Trip Screen Diagnostic test while driving normally and tell us the result. You want it near 90C. HowTo (see section 7): https://www.the75andztclub.co.uk/for...ad.php?t=55585 Diesel owners with the low temperature running issue typically fit the in-line thermostat modification with good results. Choose the stat carefully though using advice on here. TC