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Old 17-10-2010, 20:33   #1
Richard A
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Question Oil in Water - Rover 25

K series 1.4, 8 valve, P reg with 62K on the clock, oil in the water, changed head gasket including head being skimmed, replaced the heater rubber hoses as they had perished due to oil in water system.
Flushed system, but over the past 3 weeks and 100 miles the header tank keeps having a thin slick of oil reappear and the coolant level keeps going down - any ideas please other than head gasket !!!!
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Old 17-10-2010, 21:18   #2
1955diesel
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It could still be residue from the earlier failure. Have you tried degreasing the system?

Forte Bio Degreaser is the proper stuff to use but many have had success using dishwasher tabs or washing powder solution.
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Old 17-10-2010, 21:35   #3
Richard A
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Oil in Water

Thanks for the reply, yes I agree, however why the coolant loss, is there a gasket that has gone !!
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Old 17-10-2010, 22:00   #4
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oil i think will be the remains.
water loss if you cant see any external look at replacing rad cap and inlet gasket.
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Old 17-10-2010, 22:13   #5
Richard A
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Oil in Water

Ok thanks, I will check both tomorrow.
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Old 18-10-2010, 08:20   #6
1955diesel
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Have a read through the water loss thread - http://forums.mg-rover.org/showthread.php?t=335685
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Old 18-10-2010, 19:53   #7
Richard A
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Oil in Water

Thanks read the info, but how come 'oil in and water loss' at the same time !
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Old 18-10-2010, 23:35   #8
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who did the hg replacemnt... if it was a garage take it back if ya not happy.

if it was urself did u replace all the gaskets correctly or did u skimp and do the bare minimum?

check all hoses r corectly secured and not damaged. if u still cant see where the water is leaking get it pressure tested.
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Old 19-10-2010, 09:28   #9
1955diesel
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Quote:
Originally Posted by Richard A View Post
Thanks read the info, but how come 'oil in and water loss' at the same time !
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I think you just have two separate problems.
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Old 19-10-2010, 20:18   #10
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Oil in Water

I think your right, good guy at a garage did the work, the HG had evidence of a leak, head was skimmed, timing belt replaced at the same time.
The heater hose had split and was 'rotten' due to oil in the water, may be over a few months, could be this may of been the real problem.
Now have a 'thin oil slick' in the header tank and a loss of coolant.
Thanks for the replies, but any more ideas please.
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Old 19-10-2010, 20:35   #11
1955diesel
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I think that's all - degrease the system and check all the items in the coolant loss thread.
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Old 19-10-2010, 20:54   #12
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Assuming it's not HGF again and that all parts (including the cap) are sound, it sounds to me like it wasn't flushed or refilled properly.

Just splashing a low-pressure hose through will leave gunk if it was bad enough.

Re-filling too quickly will leave airlocks which - if you're lucky - will eventually work through and cause the coolant level to drop.

But it was a garage that did this, so like cooper1200 says, take it back and {ask them to sort it/demand they sort it/call Trading Standards} as applicable.
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Old 21-10-2010, 19:51   #13
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Oil in Water

Latest news !
On Sunday cleaned out header tank, topped up to level.
Monday opened bonnet - header tank - empty - no coolant !!
Filled up to "Max" level, went for a run, 30miles, checked level, all ok.
Tuesday night (after work) checked coolant level, way below "Min" level.
Cleaned out 'header tank', filled with neat antifreeze.
Started engine, drove to garage (for petrol) 3 miles, coolant level the same.
No check Wednesday (work)
Checked tonight-Thursday, coolant level below "Miin", checked for leaks, no sign of any.
OK, is someone drinking the antifreeze ? - where is the coolant going ? any ideas please !!
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Old 21-10-2010, 19:52   #14
Richard A
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Latest news !
On Sunday cleaned out header tank, topped up to level.
Monday opened bonnet - header tank - empty - no coolant !!
Filled up to "Max" level, went for a run, 30miles, checked level, all ok.
Tuesday night (after work) checked coolant level, way below "Min" level.
Cleaned out 'header tank', filled with neat antifreeze.
Started engine, drove to garage (for petrol) 3 miles, coolant level the same.
No check Wednesday (work)
Checked tonight-Thursday, coolant level below "Miin", checked for leaks, no sign of any.
OK, is someone drinking the antifreeze ? - where is the coolant going ? any ideas please !!
regards
Richard a
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Old 21-10-2010, 19:58   #15
1955diesel
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A water leak that comes and goes will either be a hose that opens up under pressure or perhaps the water pump that can have an intermitant leak when the seal sticks.

You could remove the belt cover to check the pump and have the system pressure tested to check the hoses.
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Old 21-10-2010, 20:03   #16
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i would say water pump
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Old 03-11-2010, 22:32   #17
Richard A
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Thumbs up Oil in Water

Sorry for the delay, had a weeks holiday, used the 'company car', checked the Rover on return, no coolant in header tank, no sign of any leaks on engine (gravel drive) no sign on drive.
As the 'head gasket' had gone and the heater hose was split had a good look at the radiator (13 years old), think the pressure when the 'gasket' went split welds, very difficult to see, changed radiator (44), 'bingo' problem sorted, very pleased, no oil in coolant, no loss of coolant. Old rad still had traces of oil inside.
many thanks for the help, great site.
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