Diesel thermostat related question

Madderz · 9th March 2017, 21:36

Yeah I know, yadayadayada lol

I'm going to get one of those 'mk3' replacements for my ZT in a few days, question is.... should I replace the water pump at the same time?
I've heard it has to be removed to get to the 'stat on a CDTi, so is it worth replacing at the same time or is ok to keep?

I know from experience that most VWs etc only get thiers changed regularly because they use plastic impellers that don't last.

Sprinter · 9th March 2017, 21:40

Here's Matt's HOW-To on replacing the thermostat.

No need to remove the pump and you can get the proper 'stat from Matt too.

Mike Noc · 9th March 2017, 21:44

You can replace the thermostat with the water pump in place.

My water pump failed at just short of 300k miles, so they can last. The replacement, a Circoli from ECP, only lasted a further 60k miles, so you may be better off sticking with the original if your car isn't a high miler.

It is a bit more work to replace the water pump compared to just the thermostat, but if you are doing the water pump then well worth replacing the stat at the same time, and if you are doing either then replace the O ring for the small pipe going into the stat.

Madderz · 9th March 2017, 21:45

Quote:

Originally Posted by Sprinter

Here's Matt's HOW-To on replacing the thermostat.

No need to remove the pump and you can get the proper 'stat from Matt too.

That's that sorted then!
Cheers mate

Madderz · 9th March 2017, 21:49

Quote:

Originally Posted by Mike Noc

You can replace the thermostat with the water pump in place.

My water pump failed at just short of 300k miles, so they can last. The replacement, a Circoli from ECP, only lasted a further 60k miles, so you may be better off sticking with the original if your car isn't a high miler.

It is a bit more work to replace the water pump compared to just the thermostat, but if you are doing the water pump then well worth replacing the stat at the same time, and if you are doing either then replace the O ring for the small pipe going into the stat.

It's on 130k at the moment.
I might well take a chance and keep it then.

I guess it's as likely the timing chain could fail at any point too

Mike Noc · 9th March 2017, 22:04

Quote:

Originally Posted by Madderz

I guess it's as likely the timing chain could fail at any point too

Used to hear that they are good for 250k and other such nonsense.

They were designed to last the lifetime of the engine, so yours should have plenty of life left in them, assuming regular oil changes.

Sprinter · 10th March 2017, 11:21

It seems I forgot to add the link to Matt's How-To...

http://www.the75andztclub.co.uk/foru...ght=thermostat

9th March 2017, 21:36	#1
Madderz Gets stuck in MG ZT-T Join Date: Aug 2015 Location: Barnsley Posts: 594 Thanks: 233 Thanked 132 Times in 121 Posts	Diesel thermostat related question Yeah I know, yadayadayada lol I'm going to get one of those 'mk3' replacements for my ZT in a few days, question is.... should I replace the water pump at the same time? I've heard it has to be removed to get to the 'stat on a CDTi, so is it worth replacing at the same time or is ok to keep? I know from experience that most VWs etc only get thiers changed regularly because they use plastic impellers that don't last.

9th March 2017, 21:40	#2
Sprinter Posted a thing or two Jag S-Type 4.2 V8 Join Date: Apr 2011 Location: Derby Posts: 1,645 Thanks: 271 Thanked 427 Times in 293 Posts	Here's Matt's HOW-To on replacing the thermostat. No need to remove the pump and you can get the proper 'stat from Matt too. __________________ “Time flies like an arrow. Fruit flies like a banana.”

10th March 2017, 11:21	#7
Sprinter Posted a thing or two Jag S-Type 4.2 V8 Join Date: Apr 2011 Location: Derby Posts: 1,645 Thanks: 271 Thanked 427 Times in 293 Posts	It seems I forgot to add the link to Matt's How-To... http://www.the75andztclub.co.uk/foru...ght=thermostat __________________ “Time flies like an arrow. Fruit flies like a banana.”

9th March 2017, 21:44	#3
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	You can replace the thermostat with the water pump in place. My water pump failed at just short of 300k miles, so they can last. The replacement, a Circoli from ECP, only lasted a further 60k miles, so you may be better off sticking with the original if your car isn't a high miler. It is a bit more work to replace the water pump compared to just the thermostat, but if you are doing the water pump then well worth replacing the stat at the same time, and if you are doing either then replace the O ring for the small pipe going into the stat.