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DT125R Forum -> Coolant System -> light grey gunge in cooling system
Post Info TOPIC: light grey gunge in cooling system
madrevs


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light grey gunge in cooling system
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My brothers got a 2005 dt125re which hes storing in my garage at the minute.checked the coolant level today and the radiator, expansion bottle and the hoses have a light grey gunge in them.flushed it all through today and took it out for a ride but the sludge has appeared again at the top of the rad.undoing the coolant drain bolt and the coolant runs clear.it doesnt overheat and theres no water in the gearbox.has anyone got any suggestions.he checked coolant at xmas and it was fine and clear.initially I thought headgasket but it didnt overheat and done about 15 mile journey on it today 

Thanks



-- Edited by madrevs on Sunday 15th of February 2015 11:52:34 PM



-- Edited by madrevs on Sunday 15th of February 2015 11:53:53 PM

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madrevs


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Anyone got any ideas or is the only possible cause the headgasket

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Calum122


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Doesn't have to overheat. You will lose coolant though. There really
Isn't much that can go wrong. It's a sealed system and only a failed
Water pump seal or head gasket will let oil in. If it's gearbox oil it'll go like mayonaise. And if it's two stroke it'll be gluppy meas.

I recon head gasket.

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madrevs


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Thanks for the confirmation is it worth changing base gasket aswell and is skimming the head and barrell necessary if it hasnt overheated thamks for the reply

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madrevs


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By your description definetly seems more like 2 stroke

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Calum122


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I have never officially skimmed a cylinder or head on my dt. But I always do what I did in the tut I wrote. It will just remove any crap from both surfaces and allow it to seal better. For the extra work involved it is definitely worth it. But it's your call.

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madrevs


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Thanks will give it a go

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madrevs


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Finally made a start yesterday couldn't see any holes in headgasket but the waterjacket is caked in the grey gloop20150224_142718.jpg20150224_142634.jpg20150224_142627.jpg20150224_142619.jpg20150224_142712.jpg



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madrevs


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Is the combustion area on the head meant to have carbon on only one side.this is without any cleaning.am going to give it a good clean up with autosol

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