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Originally Posted by ForcedInduction
The timing chain needs to be measured to determine if it needs replaced.
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The Japanese chains found on 92 and newer are prone to premature failure irregardless of wear.
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The headgasket is not a wear item.
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They are prone to failure however should be excluded from the replace just in case list above because when they fail, nothing disasterous happens.
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The vacuum pump should be removed and the bearings inspected to determine if it needs replacement.
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Its not a questions of the bearings, its a question of the retaining of them. But yes it would be a good idea to see if has already been replaced with the newer version that does not spill steel balls into the crankcase.