Jeepee,

Did your mechanic measure the elongation of the chain or just say it needs a new one because of the milEage?

If he mesaured the elongation and it was out of spec, then the chain should be replaced or an offset woodruff key used. If he didn't measure the elongation, then he is probably wrong. Did he check the chain tensioner?

In a same manner, were any tests done to see if the head gasket was leaking?

P E H