If my engine has broken studs can the job

"If my engine has broken studs can the job be done so the repaired engine is a long-life unit?" Going by everything that is known today, the current generation of cylinder head studs, developed for the 993, should be trouble free for at least the service life of the engine that they're in.

"If my engine was originally fitted with steel upper studs, and Dilavar lower studs, should all 24 studs be updated to Dilavar?" Porsche must have done temperature analysis regarding the required expansion of the upper and lower studs, but I've not seen a technical bulletin advising the correct way to handle this. My shop found evidence of corrosion on original, steel upper studs, so our policy was to install 24 new Dilavar studs on every engine that we repaired. Follow up inspections showed no adverse results regarding those repairs.

"Are the black-coated generation of studs, used since 1981, the latest generation Dilavar?" No, Porsche developed a new Dilavar stud for 993 models (1995-1998), and 993 studs should be used for all repairs.


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