Hi guys I was telling a mate today that since I put a quite strong anti freeze mix into my Discovery 200tdi engine it has stated to leak a small amount of coolant between the head to block joint at the front of the engine, did'nt before I put the anti freeze in.

I am thinking maybe it needs a new head gasket, but he says if I take the head off it will need skimming due it being alloy is this correct,

Also I wonder if anybody would know if I need new head bolt when doing the same job, I was under the impression the could be re-used 5 times???