You need to overhaul the engine. Your first mission is troubleshooting: did the engine seize because the pistons seized, or because the main bearings seized? To do so, pull the heads and try to remove the cylinders. If they won't come off, piston seize. If they will and when you have them off the engine won't turn over...bearing seize.
1971
nothing, they are air cooled
You don't. The engine is air cooled.
For air cooled VW 165/55R15
If it is an air cooled engine then it will not have a radiator cap.
The old Beetles were air cooled, no radiator cap.
Identify vw motor aj132115
If you're talking about a Volkswagen Transporter - THERE IS NO WATER!! It's an air-cooled engine.
This would be model year 1963.
Pulmonias are custom-made cars, using a general golf car framework and a Volkswagen Sedan motor. This motor is air-cooled, allowing for cheap maintenance costs, but making these vehicles quite noisy.
F0 1966/67 1300cc
HO 1966/67 1500cc