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Old 20th January 2019, 18:25   #11
trikey
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Originally Posted by Evasirius View Post
Not that old chestnut again!
The problem with that old chestnut is that k seal / steel seal etc will block up the heater matrix.
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Old 20th January 2019, 18:29   #12
Billyuk1
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The problem with that old chestnut is that k seal / steel seal etc will block up the heater matrix.

Best to fix the problem right 1st time instead of a quick botch in a tin.
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Old 21st January 2019, 07:20   #13
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Best to fix the problem right 1st time instead of a quick botch in a tin.
Wish people would 'read' my replies. For the last time! The heater not working and the air on needing de-gassing has been a prob from day one of purchasing the vehicle nothing to do with SS
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Old 21st January 2019, 07:29   #14
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Wish people would 'read' my replies. For the last time! The heater not working and the air on needing de-gassing has been a prob from day one of purchasing the vehicle nothing to do with SS
The heater matrix in these cars has a propensity to silt up, this is a known problem, however the sloshing noise you describe is a symptom of air trapped in the system.

What is most likely to be the cause of this, provided the system has been bled correctly, is a breach of the fire rings on the head gasket allowing combustion gasses to enter the water jacket space.

This is the type of failure that is claimed to be "repaired" when adding magic potion fixes such as K Seal and Steel Seal.

In reality what happens when these are added to the coolant, the small passageways in the cooling system, and especially the heater matrix become blocked with the "magic" and their efficiency is drastically reduced.

The top and bottom of the matter is simple, the underlying cause needs to be investigated properly or the result will be a completely ruined engine.

Brian
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Old 21st January 2019, 07:32   #15
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Originally Posted by Billyuk1 View Post
Best to fix the problem right 1st time instead of a quick botch in a tin.
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Originally Posted by marinabrian View Post
The heater matrix in these cars has a propensity to silt up, this is a known problem, however the sloshing noise you describe is a symptom of air trapped in the system.

What is most likely to be the cause of this, provided the system has been bled correctly, is a breach of the fire rings on the head gasket allowing combustion gasses to enter the water jacket space.

This is the type of failure that is claimed to be "repaired" when adding magic potion fixes such as K Seal and Steel Seal.

In reality what happens when these are added to the coolant, the small passageways in the cooling system, and especially the heater matrix become blocked with the "magic" and their efficiency is drastically reduced.

The top and bottom of the matter is simple, the underlying cause needs to be investigated properly or the result will be a completely ruined engine.

Brian
Will do, thankyou for your helpful reply.
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Old 21st January 2019, 07:41   #16
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Originally Posted by Billyuk1 View Post
When I 1st got my zt. 1800 k series.
I used to on 1st start up get a gurgling noise from the heater when cold. Was suffering coolant loss and emulsification of the oil. Also poor heater output.
Changed the head gasket and a good few flush through of the cooling system and all fixed. Not used a drop of coolant (blue not oat) and a toasty heater for nearly 2 years now.
Could it possibly be head gasket failing?
Why was steel seal added in the 1st place?
Head gasket has been overhauled plus skimmed around 2 years ago by previous owner, there is no emulsification of the oil. Think I need someone who knows the 75 well to get a diagnosis. Thanks for your input.
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Old 21st January 2019, 07:53   #17
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Head gasket has been overhauled plus skimmed around 2 years ago by previous owner, there is no emulsification of the oil. Think I need someone who knows the 75 well to get a diagnosis. Thanks for your input.
Mechanic who just replaced all top hoses and thermostat said there was hot air going in and out of heater system so puzzling!
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Old 21st January 2019, 16:27   #18
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Mechanic who just replaced all top hoses and thermostat said there was hot air going in and out of heater system so puzzling!

I suspect you mean there is hot water going in and out - which is of course required, but it doesn't mean the matrix isn't substantially silted up. You can't determine anything by feeling the hoses. Unless hot water is flowing through at the correct rate, you will not get any effective heating. Again, assuming that the coolant temperature is where it should be (see the Diagnostic Mode info) then as advised earlier, look at flushing out the matix and take things from there.


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Old 23rd January 2019, 15:40   #19
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I suspect you mean there is hot water going in and out - which is of course required, but it doesn't mean the matrix isn't substantially silted up. You can't determine anything by feeling the hoses. Unless hot water is flowing through at the correct rate, you will not get any effective heating. Again, assuming that the coolant temperature is where it should be (see the Diagnostic Mode info) then as advised earlier, look at flushing out the matix and take things from there.


TC
Thanks for the reply. Temperature fine. On 9 o'clock. Engine runs like a dream. We had system flushed when new antifreeze put in last month. Is this same as a matrix flush? Heater gets slightly warm after a while, air con needs de-gassing I think as this doesn't work. Is this related? No emulsification in rocker or dip stick. Thanks.
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Old 23rd January 2019, 16:05   #20
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Originally Posted by Evasirius View Post
Thanks for the reply. Temperature fine. On 9 o'clock. Engine runs like a dream. We had system flushed when new antifreeze put in last month. Is this same as a matrix flush? Heater gets slightly warm after a while, air con needs de-gassing I think as this doesn't work. Is this related? No emulsification in rocker or dip stick. Thanks.
Gauge at 9 o'clock means nothing much you need to access the obd as linked earlier, also, unblocking matrix https://www.the75andztclub.co.uk/for...ead.php?t=7515
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