We were due for new spark plugs in the 2008 Jeep Grand Cherokee 5.7L. The big engine meant 16 plugs! The dealership wanted $599 to do it but Jack wanted to try to do it himself. The parts were $150. $100 for the plugs and $50 for a torque socket set. We went for it and Jack did it all himself with limited supervision and for sure did a better job than what we would have gotten at the dealer.
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