Porsche 964 from 1989-1994
Despite the continuously hot-dip galvanized body, rust damage is also possible on the models. The zinc coating ages in those areas where high bending forces stress the sheet metal or where constant moisture prevails. This occurs in the Targa body, which is somewhat softer than the Coupé, especially in the area of the sills. Repairs are also not always carried out with galvanized sheet metal. Further critical zones are the upright plates, the longitudinal beams in the rear area as well as hood edges and door floors. The corners of the front and rear windscreen ends are also very susceptible to damage due to the zinc coating and moisture.
The mechanics of the air-cooled six-cylinder boxer are quite robust with regular maintenance standards. These should include valve clearance control, maintenance of the dual ignition distributor, replacement of the timing chain slide rails.
Nevertheless, even at low mileages, the following areas can cause problems: Petrol pump relays and other electrical/electronic components, air conditioning/control, leaking steering gears, worn chassis bushings, engine, and transmission suspensions, engine oil loss, broken studs, and worn valve guides.