ZT-T CDTi Thermostat changed!!

Geoff C · 11th March 2010, 18:42

Took the plunge today and changed the thermostat - had been looking at the box for 2 or 3 weeks trying to pluck up courage. Anyway the car had been running at 66 deg C for ages with only the Webasto to keep it vaguely warm but now a healthy 89 deg C so worth the effort.

A big thank you to Jules for his excellent guide and pictures which I could not have done without - it wasn't easy though and took me just over 4 1/2 hours!! Everything was hard to get at but it seemed particularly difficult to get the metal pipe to fit into the new housing - I ended up applying some petroleum jelly around the end of the pipe and it eventually went in. Anyway all done now - even got some decent heat out of the heater and the Webasto can have a well deserved rest after running continuosly for several weeks.

Found a bit of oil inside the inlet side of the Turbo so a bit worried about that. Cleaned the crankcase breather and valve just in case that was the problem but after 140,000 miles maybe the oil seals are going on the Turbo - anybody any knowledge of expected Turbo life?

T-Cut · 11th March 2010, 21:48

A twenty-odd degree Centigrade increase in running temperature must have a significant effect on fuel consumption. Could you come back with an update on this? I'm very interested in getting the numbers.

TC

Jules · 12th March 2010, 09:21

Good job Geoff!

I'll edit the post to include mentioning adding a silicone based lubricant to the O ring to aid fitment.
Goes for any O ring really. Inserting them dry is no no.

And as TC says, don't forget your before & after MPG figures

Geoff C · 12th March 2010, 13:05

OK I'll check on the MPG and report back. I have the synergy 2 fitted so I'll do a tank full and get an accurate reading.

11th March 2010, 18:42	#1
Geoff C Newbie MG ZT-T CDTi135 Join Date: Nov 2007 Location: Warwick Posts: 20 Thanks: 0 Thanked 0 Times in 0 Posts	ZT-T CDTi Thermostat changed!! Took the plunge today and changed the thermostat - had been looking at the box for 2 or 3 weeks trying to pluck up courage. Anyway the car had been running at 66 deg C for ages with only the Webasto to keep it vaguely warm but now a healthy 89 deg C so worth the effort. A big thank you to Jules for his excellent guide and pictures which I could not have done without - it wasn't easy though and took me just over 4 1/2 hours!! Everything was hard to get at but it seemed particularly difficult to get the metal pipe to fit into the new housing - I ended up applying some petroleum jelly around the end of the pipe and it eventually went in. Anyway all done now - even got some decent heat out of the heater and the Webasto can have a well deserved rest after running continuosly for several weeks. Found a bit of oil inside the inlet side of the Turbo so a bit worried about that. Cleaned the crankcase breather and valve just in case that was the problem but after 140,000 miles maybe the oil seals are going on the Turbo - anybody any knowledge of expected Turbo life?

12th March 2010, 09:21	#3
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	Good job Geoff! I'll edit the post to include mentioning adding a silicone based lubricant to the O ring to aid fitment. Goes for any O ring really. Inserting them dry is no no. And as TC says, don't forget your before & after MPG figures __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

11th March 2010, 21:48	#2
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,754 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	A twenty-odd degree Centigrade increase in running temperature must have a significant effect on fuel consumption. Could you come back with an update on this? I'm very interested in getting the numbers. TC

12th March 2010, 13:05	#4
Geoff C Newbie MG ZT-T CDTi135 Join Date: Nov 2007 Location: Warwick Posts: 20 Thanks: 0 Thanked 0 Times in 0 Posts	OK I'll check on the MPG and report back. I have the synergy 2 fitted so I'll do a tank full and get an accurate reading.