The marks on the cam cam washer and cam stand are sufficient for reassembly but not for calculating the timing. This has to be done off the valves with a dial indicator.
The intake valve has the black seal. The seals of other collors are usually silicone hightemp for the exhaust.
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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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