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No, that's not possible, crankcases are vented.I have also checked the oil level on the dip stick (making sure the car was on level ground and had been resting for over an hour without the engine being turned on) and it is about 4mm above the maximum oil level. This is after a few weeks of it leaking as well so it must have been even higher when it left Kwik Fit. Could this cause a build up of pressure in the crank case maybe? This could perhaps burst through the gasket possibly?
Have you checked that the sump bolts are tight?Anyway, I think I'm going to take this to a local garage that has been recommended by my friend and ask them to replace the gasket.
I have never heard anything good about Kwik Fit. Ever.
A friend of mine 'tested' our local Kwik Fit a few years back and put brand new pads on his car, and also had 4 identical tyres all round. He took the car to Kwik Fit to get them to change the pads 'as they are worn' and acted like he knew nothing about cars.
When he picked the car up they had replaced the new pads with old, worn down ones and they had also changed one of his front tyres to a very low tread and a completely different make.
Needless to say he pretty much ripped them a new one.
No, that's not possible, crankcases are vented.
Have you checked that the sump bolts are tight?