Let's be honest here, if he went so far as to tell you they're that thorough with chain replacements, then I'd consider that a decent shop. The fact they even knew the motor has a chain for the oil pump is good news lol

With that out of the way, I've only ever had to replace one oil pump chain - that was because the pump grenaded and took the pump drive gear with it. There's also a little spring loaded tensioner for the OP chain to replace as well. I've replaced multiple chains/guides with the oil pump set up never being touched and they've been fine. Though, it's not much more expensive to just do the OP chain and be done with it. Just ask for the old parts when they remove them is all.

Let's put it this way - that oil pan will be getting resealed and the whole front half of the motor will be resealed as well. You won't have to worry about any of that for quite a bit of the cars life.

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Allen Kroliczek
Oak Grove Autosport | Oak Grove Autosport
01 G500, 82 300TD, quite a few more.....