Technical Radiator Cap Over Pressurized

Pretty much true of all radiators , vertical or horizontal ..

 

The VIN number is stamped on the top of the frame on the driver's side between the firewall and the radiator. The letters and numbers are about 1/4 inches high and have a star at the beginning and end of the number. If the frame has been painted, you may need to s****e the top of the frame to find the number. If if is barely readable, wipe some chalk over the number to make it stand out. Examples below. Your number will be in the same location as the shown frame.