Cadillac Allante Problems: 5 Issues Every Owner Should Know
1987-1993 model years · 350+ owner reports · Updated April 2026
According to Au7o's analysis of 350+ owner reports, the 1987-1993 Cadillac Allante has 5 documented known issues, with 2 rated critical. The most serious are 4.1L/4.5L HT Engine Head Gasket and Bolt Failure ($1,500-$3,000 repair) and 4.6L Northstar V8 Head Gasket Failure (1993) ($3,000-$6,000 repair). The most commonly reported issue is Convertible Top Hydraulic Cylinder Leaks with 190 owner reports. Across all issues, repair costs range from $200 to $6,000. DIY maintenance guides at au7o.io.