My son owns a 2011 manual petrol i30 and after I replaced the the timing belt and front seal, the front seal keeps popping out after only been started for a few minutes. There is about 1.5mm of horizontal movement in the crank which tells me there is worn crank thrust bearings. Is this the source of my popping seal problems. It's driving me nuts as i have spent nearly a week working on this problem replacing seals from different manufacturers including Hyundai, and no one at Hyundai seems to know anything about it. I called more than a dozen dealers all over the country.
Maybe the front seal is pushed out by hydraulic force, because the oil pump is situated just behind the seal, and maybe the slight sideways movement of the crankshaft pumps the seal out. Does that sound feasible?
Please someone help.