Losing coolant cdud engine

[swalker]

holding pressure overnight?!?!

does the level change if you hold a few revs for a short time then let go (with the cap off)?

[scotthopkinson8]

I'm not sure about that I will give that a try in the morning when the engine is cold. I do have some fault codes too. I'll post shortly

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[scotthopkinson8]

Here are my codes. Hope thus helps

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[swalker]

Lol holding pressure overnight..... from a pressure test I am now guessing? Not from normal running I hope.

[scotthopkinson8]

Sorry, I should have been more clear. Not had pressure test, just opened cap after being stood overnight and there was an escape of air and the coolant rose a little

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[swalker]

that doesn't sound right, i would imagine there may be a small bit of pressure after some time - but not enough to change coolant level?

[scotthopkinson8]

Same again this morning. Not alot of pressure but enough to raise in tank about 10mm. Then at work after short drive, opened cap and pressure brought it back upto minimum

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[scotthopkinson8]

Hi swalker. I stated car with expansion tank cap off this morning and revved a few times. It did nothing to the levels. I've not come to work in it today so I couldn't rev it again while warm with cap off. It's really frustrating me

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[swalker]

ok so we are wondering off here? reset time.

the fault code you posted is from January, did you clear it and has any returned.
whats the current symptoms of your fault?

[scotthopkinson8]

I cleared the codes, and they came back. I can do another scan tonight when I'm home. I am right in thinking the coolant pump in the codes is the one under the windscreen ? It has been replaced with genuine part from audi dealer.

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