Service Information: Notes

It is very important that the ventilator valve and other components of the system be serviced regularly to insure that they are operating properly. The 1961 through 1964 Cadillac requires servicing of the system at each oil change. The 1965 through 1967 Cadillac requires replacement of the ventilator valve every 12, 000 miles, or every 12 months, whichever comes first. The rest of the system should be serviced at the same interval.