The overhaul is regarded as a capital expenditure (CAPEX) . CAPEX is the money a company spends to buy, maintain, or improve its fixed assets. Fixed assets are building, vehicles, land, equipment. So, in Pat's case, buying the overhaul will extend the useful life of the van, so it is a CAPEX.
Pat will upgrade his productive assets (vehicle:van) in order to increase the capacity or efficiency.