Nice feeling having my oil lines done... scenery on long runs is a lot nicer than an oil pressure gauge.

Been thinking about the other two potential grenades in my engine bay: timing chain and vacuum pump.

I check chain stretch every valve adjustment. Though at 41 years and 230k miles, I suppose the preemptive thing here would be to change it. I don't know what to expect.

What's been the consensus approach here?


Ditto for vacuum pump. That thing grenading ball bearing into my timing chain would be a disaster, though rebuild kits for bearing arm appear NLA.

What's been best practice here?


Be great to get on top of something if I can, though not wanting to rush pellmell into sleeping dogs and possibly shoddier replacement parts than their hardworking originals.


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1981 240D 4sp manual. Ivory White.