For the area surrounding the chain gallery the head gasket has to be in effect reused. Its ability as a head gasket isn't deminished but care must be taken as to sealing the gallery reusing the gasket.

We have had no problems, but I purposely didn't advise as I can't see your arrangement.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician