That would really be an ignorant move to mess with those head bolts that have been down and stressed for a long time. If you think someone has messed with some or all of the headbolts, you only have one course of action and that would be to remove the head and install a new head gasket from scratch and measure all head bolts for stretch and replace as needed.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!