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 Search Today's Posts Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 10th October 2019, 12:20   #1
Odd Job
My Gremlin got wet!
 
Odd Job's Avatar
 
MG ZT 2.0 cdti

Join Date: Aug 2019
Location: Derby
Posts: 616
Thanks: 184
Thanked 143 Times in 104 Posts
Default To Flush, or not To Flush?

Hi all,

Just a bit of advice please.

I have fitted an inline thermostat mod to my CDTi, as we are now heading to the colder time of the year, I intend to give my car a full coolant change.
In all the service history I have with the car I have no evidence of it being changed!
I hope it has been changed at some point since 2005!!

Anyway,
My "normal" thermostat has packed up hence the in hose thermostat being fitted.
If I use a radiator flush, do I stand a chance of the old thermostat starting to work again? If so, will this cause problems with having the in hose one fitted as well?

Many thanks in advance.

Richard
__________________
….And the latest thing to break is.....
Odd Job is offline   Reply With Quote
Old 10th October 2019, 12:29   #2
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Rover 3500 Vanden Plas (1984).

Join Date: Mar 2007
Location: Middlesex
Posts: 16,568
Thanks: 906
Thanked 2,695 Times in 2,330 Posts
Default

Richard,

I'd say that unless you have evidence of contamination, don't bother using a flushing product, just drain and renew the antifreeze solution. Using distilled/de-ionised water rather than tap water will stop scale forming. You can pick up 5 litres for about the price of a bottle of lager in a pub.

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 10th October 2019, 16:00   #3
ardvark
Al
 
ardvark's Avatar
 
75 CDTI Tourer Auto

Join Date: Mar 2009
Location: Studley, Warwickshire.
Posts: 1,179
Thanks: 2
Thanked 22 Times in 21 Posts
Default

This 'mod' you've done. Does it make the incar heater blow hotter?
__________________
ARDVARK
ardvark is offline   Reply With Quote
Old 10th October 2019, 19:05   #4
Comfortably Numb
Posted a thing or two
 
Rover 75 Saloon

Join Date: Dec 2017
Location: Penrith
Posts: 1,345
Thanks: 171
Thanked 305 Times in 243 Posts
Default

Quote:
Originally Posted by SD1too View Post
Richard,

I'd say that unless you have evidence of contamination, don't bother using a flushing product, just drain and renew the antifreeze solution. Using distilled/de-ionised water rather than tap water will stop scale forming. You can pick up 5 litres for about the price of a bottle of lager in a pub.

Simon
However, if you are changing from the original specified (pink) OAT based coolant to something less (anecdotally) harmful, like blue or green silicate based, or other formula, then you should definitely flush it, as any mixing of different types causes gel-like precipitates to form.
Comfortably Numb is offline   Reply With Quote
Old 11th October 2019, 14:23   #5
COLVERT
Foreign correspondent.
 
COLVERT's Avatar
 
R75 Saloon.

Join Date: Feb 2009
Location: France/or Devon.
Posts: 10,988
Thanks: 2,735
Thanked 1,278 Times in 1,108 Posts
Default

If the old stuff comes out clean, don't flush it.
__________________
COLVERT 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 +1. The time now is 23:38.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright © 2006-2020, The Rover 75 & MG ZT Owners Club Ltd