Help! I decided to give my MCS 52 plate a much needed oil and filter change. I added Wynns Engine Flush to the oil and ran for 20mins.

When I tried to remove the sump plug it was so tight I ended up rounding it off! I can't remove the plug and my engine's full of nasty engine flush! :angry:

Two questions:

1. How do I remove a rounded off sump plug?
2. Will the engine flush do any damage if left in the car?

Hope someone can help.

Cheers.

The only thing i can suggest is to try and file two flat edges onto
the rounded off sump plug in the hope you'll be able to get a spanner
onto it.
As for the engine flush being left in the engine, i don't know if that
will damage anything.
I wouldn't have thought so as it should all be in the sump now
with the engine oil.
Should be safe there, i would imagine.

You could try some mole grips. Just make sure to tighten it as much as possible, then you can try knocking it with a hammer to undo it. Just make sure you've got a new sump plug and washer.