I agree, reuse the head bolts if they're within spec. That's what I did. No problems. I imagine the spec was written because it's so easy to lose track and stretch-torque bolts twice during a job. Measuring the bolt length will weed out these bolts.

Plus, if you understand the stress-strain behavior of bolts, you'll feel comfortable reusing these bolts.

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95 E320 Cabriolet, 169K