I own a 1990 Oldsmobile Custom Cruiser wagon (Full-size) that I love to drive. This car is my daily driver. My brake system is not working properly because I have a small leak coming from the proportioning valve. I am in need of a OEM replacement or a reliable after market part. Any help would be greatly appreciated.
Thank you
Andy

 

Andy, if you get the chance to check salvage yards you should be able to get a proportioning valve off of any 85-90 Olds Custom Cruiser, 98 or Delta 88. You should also check other GM B/C body cars (i.e. Buick Estate Wagon, Chevy Caprice, Pontiac Parisienne, etc.).

 

Andy, careful on the interchanges. 85 - 90 Olds 98's were a front wheel drive car. The valve might not interchange. I would expect different weight distribution at least if not a different size altogether. 1977 - 1984 Olds 98's were rear wheel drive and might be a match. 1977 - 1985 Olds 88's were also rear wheel drive. However, 1986 - 1990 Olds 88's went to front wheel drive. Olds, Chevy and Buick had full size wagons from 1977 thru 1990. Pontiac had wagons, but name changed and went from full size to intermediate as well along the 1980's. I love all types of wagons myself and good luck with yours. Trent in Los Angeles.

 

Trent is correct, I just @$$umed everyone knew Olds made the mistake of going to FWD in the 80s.

The FWD Oldsmobiles won't have any parts interchange with your OCC.

 

I had this problem on my 1984 Custom Cruiser. I used a brass aftermarket combo valve from Summit. Bolted in and worked with no issues. The factory cast iron combo valve tends to accumulate rust internally, which leads to problems.