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Old 12th June 2019, 08:43   #1
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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.
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Old 12th June 2019, 08:46   #2
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Sounds like you're overfilling the expansion chamber. The "full" marker is quite a long way down and only just needs to be covered.
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Old 12th June 2019, 09:02   #3
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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
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Old 12th June 2019, 10:11   #4
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Try opening the bleed screw until coolant runs, take it for a spin with obd temp. engaged, re-check bleed screw for air.

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Old 12th June 2019, 10:53   #5
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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?
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Old 12th June 2019, 11:57   #6
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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...
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Old 12th June 2019, 12:00   #7
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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.

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Old 12th June 2019, 12:02   #8
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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.

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Old 12th June 2019, 12:06   #9
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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
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Old 12th June 2019, 12:07   #10
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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 12:23.. Reason: additional info
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