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97 Ford F-150,V-6 4.2,why do they rcommend replacing the head bolts on this model after working the heads,and what are the consiquencies if you don't?

the bolts are "torque to

the bolts are "torque to yield " type and have a calculated strech point. that is why the specs. are in degrees insted of foot pounds. anyways the bolts cann't be used over, they may brake or not hold the head down evenly, in turn, head gasket failure.

save yourself some problems

save yourself some problems and follow the recommended procedures.

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