Problem Description and Possible Solution
The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Running the engine with a coolant/oil mix may result in engine damage. Replacing the intake manifold gasket should correct this issue.
Average mileage: 138,500 (110,000–167,000)
7 people reported this problem
A 1/2" hole developed on the top of the intake manifold. The part is obsolete per Cadillac, the 94-96 parts will not fit. Because this is TBI there are no aftermarket parts that are CA legal so you have to hit the junkyards to find one or find a good aluminum welder/brazier. The 91 or 92 Chevy Caprice cop car or the 92 Buick Roadmaster use the same manifold; both more plentiful than the 93 Fleetwood.
The price for salvage parts is just nuts. A dude in Chicago quoted me over $300, a yard in TX wanted $225, I wanted pictures before I dropped the cash & both were so nasty it was tough to see if they were damaged or not. I finally scored, tho, found a manifold at Forest Auto Parts in Lewiston, ID. $45 + S&H, sweet. While you're at the junkyard, stock up on window regulators and motors, you'll need them. I'm the one that drove this beauty off the lot brand spanking new & it has been the best one I ever owned. Powerful engine, smooth ride, the last of the BIG luxury cars, a land yacht for sure.