I was concerned about that work too, but not enough not to buy the car! Now I am begining to wonder...

The first owner probably did a lot of short trips and maybe flogged it when cold too. I hope not! The car is tight in other respects, so my first assessment was that it had been well treated.

What sort of problems would this uneven compression be likely to cause?

Also, is there anything I should do to stop it getting worse?

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My previous car was a Honda