Two problems related to coolant leaking have been reported for the 1998 Cadillac Deville. The most recently reported issues are listed below.
The failure occurs in normal use. The consequence is possible engine damage. The dealer has refused to repair this obvious and common manufacturing flaw in the northstar engine. The situation, because this is the same engineer is the same that is described in NHTSA recall number 99086: date: 12/01/1999 component name: 061000 engine and engine cooling:engine NHTSA #: 99086 summary: some vehicles may exhibit a condition in which the cylinder head bolts may become loose and cause coolant leaks and possible engine damage.
Component: engine and engine cooling:engine details: the failure occurs in normal use. The consequence is possible engine damage. The dealer has refused to repair this obvious and common manufacturing flaw in the northstar engine. The situation, because this is the same engineer is the same that is described in NHTSA recall number 99086: date: 12/01/1999 component name: 061000 engine and engine cooling:engine NHTSA #: 99086 summary: some vehicles may exhibit a condition in which the cylinder head bolts may become loose and cause coolant leaks and possible engine damage.