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Coolant in the oil!!! YZF250 01

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Hi there,

Ive just rebuilt my engine, started it then coolant was leaking out of the weep hole. Stripped water pump down decided to get new shaft and seals, once I rebuilt it again filled with coolant, oil sump plug still out, coolant just came straight out of the oil drain off.

This engine has had full seal kit inc head and base gaskets! dont know where else coolant can come out of, please someone advise?

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The seals are fitted right, when I took w\p cover off to check, there was no indication that it was leaking through the seals i.e drips. Is the only other way of getting into the oil through the head or base gaskets or is there another way?

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Case oring from memory here

DSCN2174-1.jpg

Have you done any other work to the bike ?? Post some pics of the pump seal? Seems a bit strange.

MM

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