o·ver·haul 
(ō′vər-hôl, ōvər-hôl′)
(ō′vər-hôl, ōvər-hôl′)tr.v. o·ver·hauled, o·ver·haul·ing, o·ver·hauls
1.
a. To examine thoroughly and make any needed repairs: overhauled the engine to check for problems.
b. To revise extensively: proposals to overhaul the health care system.
2. Nautical To slacken (a line) or to release and separate the blocks of (a tackle).
3. Chiefly British To catch up with; overtake: overhauled the fugitive after a six-hour chase.
n. (ōvər-hôl′)
1. An act of overhauling.
2. A repair job.
o′ver·hauler n.