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11th February 2010, 10:50 | #1 |
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KV6 losing coolant. Advice please.
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Last edited by Dragrad; 7th May 2012 at 23:49.. |
11th February 2010, 11:03 | #2 |
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Most likely I think is the thermostat housing and/or adjoining pipes.
Take off engine cover and check in 'V' between cylinders for red coolant staining. HGF comes at the very bottom of the list for KV6 cooling problems. Can happen of course like on any engine but pretty rare on KV6. Last edited by David3807; 11th February 2010 at 11:06.. |
11th February 2010, 12:49 | #3 |
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It is liners that leak. And, yes, you can have, and most likely do have, a leaking thermostat housing.
See why you loose water: http://www.the75andztclub.co.uk/foru...ght=thermostat See whats up with your thermostat: http://www.the75andztclub.co.uk/foru...ght=thermostat Only now realize you say it is the radiator cap with mayo. That indicates oil in the water. To be sure of the liners it should be the oil filler cap, which would be water in the oil. Anyhow, enjoy reading. The stuff is certainly worth knowing, if you want to keep the car. Last edited by kaiser; 11th February 2010 at 12:53.. |
12th February 2010, 10:12 | #4 |
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Sounds very odd. Here's the Rimmer diagrams for all the bits. You should be able to fathom it from these:
Pipework V6: http://www.rimmerbros.co.uk/Item--i-GRID001584 Expansion Tank V6: http://www.rimmerbros.co.uk/Item--i-GRID001598 TC Last edited by Dragrad; 7th May 2012 at 23:50.. |
12th February 2010, 10:30 | #5 |
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A couple of long shots.
1. HGF 2. Elevated oil level 3. Auto trans water/oil heat exchanger 4. Bearing in water pump (this is a really looooong shot!!) 5. Crack in block 6. Failed inlet manifold gasket I am sure there are another couple of possibilities, but darn if I can think of them at the moment. I would check the water pump for a leak as well. You would be able to pick up stains behind the left front wheel at the bottom of the plastic cambelt cover. You can have a fault where the pump leaks only while standing still, or one which only leaks while driving! I have had both. So to say these pumps are strong would be to really really be an optimist! Last edited by Dragrad; 7th May 2012 at 23:50.. |
13th February 2010, 12:21 | #6 |
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You realize that a leaking thermostat will not explain why you have oil in the water.
But, apart from that, try this for size: http://forums.mg-rover.org/showthrea...tal+thermostat |
13th February 2010, 18:48 | #7 |
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Haynes:
Inlet manifold to head: 25Nm = 18 lbf ft Inlet manifold upper section bolts: 18Nm = 13 lbf ft New gasket, new seals, new O-rings required. Not an expert but 25Nm is NOT finger tight and there is coolant flowing through the manifold so you might be on to something. |
12th March 2011, 16:49 | #8 |
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Question: Given the KV6 is known for airlocks is it likely the extra coolant was needed due to airlocks/settling and would you learn-ed people expect it to settle down now?[/QUOTE]
Yes, i have had to top up a couple of times since last doing my last stat, no more then a litre. Also done this on other cars where i have replaced coolant. Did you follow the haynes guide for refilling coolant etc? John |
23rd March 2011, 19:47 | #9 |
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It may well be from here....and being evaporated by the exhaust headers hence no drips... http://www.the75andztclub.co.uk/foru...ad.php?t=81072 Last edited by Dragrad; 7th May 2012 at 23:50.. |
23rd March 2011, 19:49 | #10 |
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Try the water pump, remove the engine undertray, leave to stand overnight, check next morning and if you have coolant running down to the sump then get the water pump checked.
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