If there's any play in the crank/rod bearings you will hear the clicking noise of the piston tapping the head. It really would be wise to check the bearings at this early repair stage. It cost me £240 (uk) for a complete crank regrind and new bearings (+.25mm) at a local machine shop. My car is an early 1990 (m20), but I was willing to spend the extra money just for my peace of mind. If this engine fails prematurely, your customer will have to spend a lot more money than he saved on this occasion. Just my opinion!

Best of luck,

Shaun