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#1 |
Retired
ZT Join Date: Nov 2014
Location: Cymru
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![]() Hi all,
I'm new to this forum so this is the first post. I know that the KV6 pressurising problems have been done to death and I have read most of them and looked to solve the problem on my 190 with forum suggestions but..... it is still pressuring!! Below is a list of items done to date:- 1. New radiator & condensor 2. New lower hoses to oil cooler 3. New stat and parts to go with 4. Modified existing old 3 speed fan with new gold resistor and modified wiring to suit, now a 2 speed. 5. New water pump 6. Sniff test of coolant for any combustion gas...all ok 7. Replacement header tank cap 8. Replaced coolant at 50.50 OAT, refilled slowly with header tank raised. 9. New inlet mainfold gasket to front bank Its still chucking coolant out past the cap when hot, all hoses, rad etc hot and at pressure. Heater is also running fine with hot air being pushed out. Checked engine temp with OBD and 2 speed mod is cutting in at correct temps. So I'm getting a bit fed up and not sure where to go next. Any ideas gratefully received. Thanks |
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#2 |
This is my second home
Jaguar XF 3.0D Join Date: Nov 2010
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![]() Taken a long time as a member to ask for help, but have finally asked and am sure a K6 expert will respond shortly, meanwhile despite raising header tank, sounds like air in system.
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#3 |
Retired
ZT Join Date: Nov 2014
Location: Cymru
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Thanks: 10
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![]() Been lurking!
Joined a while back to deal with another problem on the 160 but found my answer in another post so not needed it until now! Oh and no pink stuff in the V either! Last edited by Dragrad; 16th July 2015 at 23:54.. Reason: Consecutive posts - Use the edit ;-) |
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#4 |
This is my second home
Roverless + 1.7D Sportage Join Date: Aug 2014
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![]() Are you filling to the correct level? It is waaaaay down as you look in the top of the tank. Lots of folks overfill and that doesn't allow for expansion when hot.
See HERE. Mike
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Oil in my veins! Last edited by roverbarmy; 16th July 2015 at 14:29.. |
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#5 |
Gets stuck in
MG ZT-T 190 Join Date: Feb 2015
Location: Chatham
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![]() I endorse what roverbarmy says, plus this.....
From cold, remove the cap and start the engine. Look down the header tank filler. Do you have any coolant coming from the small pipe in the neck? Also, if the coolant immediately rises to overflow, you may have a blocked water passage through the oil cooler. Also, order some new "O" rings for the filler cap. There are two and they are different sizes so get them in the correct place on the cap. You can eliminate the oil cooler by bi-passing the water pipes to see if the result is a positive one. Hope this helps some. Steve |
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#6 | |
Gets stuck in
Rover 75 Saloon 2.5 Join Date: Jul 2012
Location: Melbourne
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![]() Quote:
http://www.the75andztclub.co.uk/foru...5&postcount=15 Might be worth trying again to see if there is any air left in there. Then you might want to get the coolant tested for exhaust fumes in case there is a problem in the engine. Failing that, perhaps check the header tank cap is the correct one. I believe there are different ones. |
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#7 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
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![]() Is there any pressure released on opening the filler cap when the engine is completely cold?
TC |
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#8 |
Retired
ZT Join Date: Nov 2014
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![]() Yes I think so.
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#9 | |||||
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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![]() Hello Nigel (errol1),
I can see where this thread is leading. Please let me reassure you that your engine, the KV6, is not susceptible to the head gasket failure commonly found with the 1.8 litre engine. This is because the gaskets are a completely different multi-layer construction. You have received several very sensible replies suggesting possible causes of the ejection of coolant you have reported from your expansion tank cap. You need to address these straight away. I'll give you some further tips to help with this. Quote:
When you raised the header tank, did you also open the bleed screw (with the engine not running) as described in MG Rover's refilling procedure? Quote:
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So, lots of positive things for you to do Nigel and the chances are that one of them will be responsible for your overflow of coolant. If you have any questions about any of this, fire away. ![]() Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
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#10 |
Discount MG Rover Spares
Rover 75 CDTi, 2x MG ZS180 Join Date: Jun 2011
Location: Hythe, Southampton
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![]() A coolant 'sniff test' would help in pinpointing the problem - if the boiling over of HGF, there would definitely be combustion gasses in the coolant.
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