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11th October 2019, 11:42 | #1 |
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coolant leak KV6
Hi All,
I can't remember when I last posted about this problem and thus can't find the thread. However, I still have the problem of a coolant leak which I cannot find. I have checked everything there is no exterior leak. I borrowed a pump for the cooling system pumped it up to 14lbs and the needle remained rock steady. After travelling about 70-80 miles I have had to put in about 350ccs of coolant. The car is performing ok and I got a mechanic who I know to have a quick look and his view was that it was not HGF, but where on earth is the coolant going. I am nearly at the end of my tether with this problem and after nearly a year! In spite of what my mechanic and Simon said on this forum I still think that it must be HGF I don't think it can be anything else, can it? Any bright ideas please. Martin |
11th October 2019, 11:52 | #2 |
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Martin,
23rd September was your last post on the subject of coolant loss. If you select 'view public profile' under your user name to the left of your message, choose the 'statistics' tab, then 'Find all posts by Mr Toad' you will get a list of all of them. Simon
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11th October 2019, 12:21 | #3 |
I really should get out more.......
Rover 75 connoisseur se v6 auto Join Date: May 2014
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If i was suspecting HGF - albeit on my 1.8t - i would be looking for the following
1. Brown mayo on the dipstick 2. Brown mayo under the oil filler cap 3. Pressure escaping from a cold system - ie after a good thrash - say 10-15 miles at motorway speed - leave till next day and open expansion tank cap - if there is a loud sound of escaping gas then that points to exhaust fumes in the cooling system and points toward HGF Did your mechanic do the chemical CO2 test on the coolant - not sure if it gives false positives - but it sems to be in widespread use to identify exhaust gases in the coolant.
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11th October 2019, 12:26 | #4 | |
Posted a thing or two
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Quote:
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11th October 2019, 16:16 | #5 | |
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Quote:
So my suggestion is water pump. Hope that helps. Last edited by Gunnerhavesome; 11th October 2019 at 16:18.. |
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9th January 2020, 16:23 | #6 |
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Coolant leak
Hi All,
Happy New Year everyone I'm afraid I still have the coolant leak. There has been no real change so it looks like the heads are going to have to be removed. However, I was speaking to a garage proprietor today and he gave me a product called "Rad Fix". He says it is non clogging and he has used it many times with good results. The product is not generally on the market it is supplied to garages and large transport organisations apparently. It is made by a company called Tough Technology Products and I have spoken to them and they confirm that the product is not like all the other products on the market but they obviously could not guarantee that it will work but they said it can be easily flushed out if it doesn't. Anybody had any experience of this product as I am very tempted to give it a try. Martin |
9th January 2020, 18:46 | #7 |
I really should get out more.......
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Firstly 2 things to bear in mind - HGF on the V6 is a rare event and any sealant is viewed by many as the devils device - causes more problems in the long run than it solves. The line of thought is find the leak.
Does the car still run OK ? Could it be the Inlet Manifold Gasket - i had this on a 1.8t and the leak was small .
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She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide. |
9th January 2020, 21:49 | #8 |
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The car runs perfectly and in a previous thread I explained that I have replaced the inlet manifold gaskets TWICE to eliminate that source of the leak.
For the life of me I cannot find any leak I doubt that I can spend any more time trying to find it. I now have to make a decision either to add the Rad-Fix or take the heads off. As they say the stuff is non clogging it may be worth giving it a try. They say it can be flushed out if it doesn't! Anyone else got any views please? Martin |
9th January 2020, 21:53 | #9 |
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You may not find the leak even after fitting new head gaskets, a local member has the same problem, water level dropping randomly, he has had the head gaskets replaced by a reputable garage, I have changed the stat and the inlet gaskets, its had a new oil cooler and I cannot locate the issue!
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10th January 2020, 08:21 | #10 | |
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Quote:
The second point about products like that is that they do not eliminate the problem, they "paper over the cracks". The third point is that they're designed for completely non-technical owners which you clearly are not. Removing the heads will be a waste of time and a lot of money. You will not have head gasket failure on a KV6. Have you ensured that the two plastic clips on the straight pipe in the 'V' are both pushed fully outwards so that they are in close contact with the water pump and thermostat housings? A small leak in the 'V' can evaporate leaving little trace. Renewing the flattened 'O' ring seals on my original expansion tank cap made a big difference. Have you done that? Simon
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