03-05-2022, 11:32 AM
Prior to the anti acid and other features of oils of the 1950s and thermostats wear of most engines was considerable. Near all makes were rebored at soem satge. Now .0025 in 100,000 would be a lot in a modern or even a 1960s car.
Condensation from cold running was the death of main bearings; probably now less so with anti corrosive oils. Valves were a trial; part due lead and many cars had mere XB steel or lesser. My car run extensively on the main road needed attention about every 5000 and others reported the same at the time. I presume current valves are of current materials.
Condensation from cold running was the death of main bearings; probably now less so with anti corrosive oils. Valves were a trial; part due lead and many cars had mere XB steel or lesser. My car run extensively on the main road needed attention about every 5000 and others reported the same at the time. I presume current valves are of current materials.