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 12th June 2019, 07:43   #1
190+
Regular poster
 
190+'s Avatar
 
MG ZT

Join Date: Apr 2019
Location: Walsall
Posts: 74
Thanks: 37
Thanked 12 Times in 4 Posts
Default possible blockage

I took my other zt for a 150 mile journey the other day and i noticed some water loss through the cap.
after cooling i refilled the tank (about 600mls of water) and drove the car around on errands. car performed as normal.

checked the water the next day. No hiss on removal of cap but the water level is about one inch from the top of the expansion tank .
I think there might be a blockage. Any clues as what to do other than a flush through the tank and main rad.
Cant deal with it until i get it home as the place im staying has no tools .


Thanks for any advice in advance.
190+ is offline   Reply With Quote
Old 12th June 2019, 07:46   #2
Lord of Hog
Gets stuck in
 
Lord of Hog's Avatar
 
Rover 75 2.5 V6 in Wedgwood Blue

Join Date: Dec 2015
Location: Felbridge, East Grinstead
Posts: 982
Thanks: 250
Thanked 294 Times in 206 Posts
Default

Sounds like you're overfilling the expansion chamber. The "full" marker is quite a long way down and only just needs to be covered.
__________________


Conformity is not morality.
Consensus is not truth.
Lord of Hog is offline   Reply With Quote
Old 12th June 2019, 08:02   #3
190+
Regular poster
 
190+'s Avatar
 
MG ZT

Join Date: Apr 2019
Location: Walsall
Posts: 74
Thanks: 37
Thanked 12 Times in 4 Posts
Default

Not overfilling .
I know where the fill level is. I only fill to that level.

On removing the cap the level has raised from the fill mark to within an inch of the top of the tank and has not gone down
190+ is offline   Reply With Quote
Old 12th June 2019, 09:11   #4
vitesse
I really should get out more.......
 
Rover 75 Saloon

Join Date: Jul 2011
Location: Gävle
Posts: 2,516
Thanks: 395
Thanked 823 Times in 652 Posts
Default

Try opening the bleed screw until coolant runs, take it for a spin with obd temp. engaged, re-check bleed screw for air.

Regards
vitesse is offline   Reply With Quote
Old 12th June 2019, 09:53   #5
Lord of Hog
Gets stuck in
 
Lord of Hog's Avatar
 
Rover 75 2.5 V6 in Wedgwood Blue

Join Date: Dec 2015
Location: Felbridge, East Grinstead
Posts: 982
Thanks: 250
Thanked 294 Times in 206 Posts
Default

Either that or drain and re-fill the system BY THE BOOK. They are extremely prone to air locks. Have you noticed any momentary temperature fluctuations?
__________________


Conformity is not morality.
Consensus is not truth.
Lord of Hog is offline   Reply With Quote
Old 12th June 2019, 10:57   #6
190+
Regular poster
 
190+'s Avatar
 
MG ZT

Join Date: Apr 2019
Location: Walsall
Posts: 74
Thanks: 37
Thanked 12 Times in 4 Posts
Default

I have done all the known things when filling the coolant.
there was no air when bleeding system..

Cannot check temp as o do not have OBD reader.
Is there a thread on draining, flushing and refilling the coolant?


Thanks for any answers...
190+ is offline   Reply With Quote
Old 12th June 2019, 11:00   #7
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: 20,265
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Which engine does your "other" ZT have Basil? Has any work been carried out on the cooling system?
Quote:
Originally Posted by Lord of Hog View Post
... drain and re-fill the system BY THE BOOK. They are extremely prone to air locks.
... But they aren't if you drain and re-fill "by the book"! So I agree with Lord of Hog, particularly if it's a KV6.

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 12th June 2019, 11:02   #8
vitesse
I really should get out more.......
 
Rover 75 Saloon

Join Date: Jul 2011
Location: Gävle
Posts: 2,516
Thanks: 395
Thanked 823 Times in 652 Posts
Default

Don't need OBD reader as T-Cut has provided this:https://www.the75andztclub.co.uk/for...ad.php?t=55585

Lovel has a thread about refilling just two down from yours.

Regards
vitesse is offline   Reply With Quote
Old 12th June 2019, 11:06   #9
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: 20,265
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Quote:
Originally Posted by 190+ View Post
I have done all the known things when filling the coolant.
Does that include not starting the engine with the bleed screw removed Basil? Also, if it's a KV6, did you raise the expansion tank?

Quote:
Is there a thread on draining, flushing and refilling the coolant?
Here it is for the KV6.

If you have a different engine, please let me know.

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 12th June 2019, 11:07   #10
190+
Regular poster
 
190+'s Avatar
 
MG ZT

Join Date: Apr 2019
Location: Walsall
Posts: 74
Thanks: 37
Thanked 12 Times in 4 Posts
Default

Thanks for the link
My second car is a mg zt V6 180 saloon auto


My first car is a zt t v6 190 estate.

Last edited by 190+; 12th June 2019 at 11:23.. Reason: additional info
190+ 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 22:25.


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