Oil in Expansion tank

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CitroJim
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Oil in Expansion tank

Post by CitroJim » 06 Mar 2010, 11:19

A little crack in the head or block somewhere then Peter, but not dramatic as it must have been well away from the combustion chambers.

Indeed, an engine will run like this for years. K-Seal may help but the problem is that oil at 50psi is pushing against water at 15psi tops so any coolant sealers may not be very effective as it is being asked to work in reverse.

It's a very good point too about a previous rad sealer application may be the cause. Lots of the cheaper and older formulations (Bars Leaks?) had a lot of soluble oil in them.

Note that any oil in the coolant will reduce the heat transfer capability of the system so the oil run-off exercise you describe, Peter, needs to be done frequently to avoid possible overheating.

mark230678
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Oil in Expansion tank

Post by mark230678 » 07 Mar 2010, 15:25

As a change to previous thread.
Its the coolant temp light that is contiuously on rather than the oil coolant???
Any other offers for this one

mark230678
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Oil in Expansion tank

Post by mark230678 » 08 Mar 2010, 09:39

Going to flush it out few times today to see what happens.
Just a bit curious about coolant light being constantly on now
Is there a fault with thermostat as well??
Will take that out to check

mark230678
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Oil in Expansion tank

Post by mark230678 » 10 Mar 2010, 12:52

Had another look today and began flushing the system.
Still oil coming through and i have no oil left in the oil filler, after putting 5 litres through it last week.
There is now greyish colour on dipstick.
Am i thinking headgasket now or cracked block.
Take it the oil cooler wouldnt do this...
Coolant light issue is from the connector on the top

Peter.N.
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Oil in Expansion tank

Post by Peter.N. » 10 Mar 2010, 14:55

If its the coolant level light that's on, that's because the sensor is contaminted with oil.

Are you saying that its lost a sumpful of oil? if so you have got a problem!

Peter

mark230678
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Oil in Expansion tank

Post by mark230678 » 10 Mar 2010, 14:59

Pretty much lost a sump.
Put 5 litres of oil in last week, whilst it was laid up and to see if oil came through cooler pipes.
Just drained sump now, probably 2 litres of oil first few 100 mls was water though.

Problem with head, cooler, block or gasket.
Which is most likely??????

Peter.N.
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Oil in Expansion tank

Post by Peter.N. » 10 Mar 2010, 15:05

If you have oil in the water as well you have a big leak there, could be the h/gasket but equally well a crack in the head or block. Does the engine run OK?

mark230678
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Oil in Expansion tank

Post by mark230678 » 10 Mar 2010, 15:11

Engine runs great.
No missing, no plumes of smoke granted last time i started it i was in the garage and it was a little smoky.
But sounds spot on

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Oil in Expansion tank

Post by Peter.N. » 10 Mar 2010, 16:02

I fear a crack then :(