The EPC shows one picture of a gasket, but lists the gasket and sealing flange. Is there a strong possibility of stuck broken or stripped threads on these bolts? I do not want to make matters worse.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual