Hey folks,
I have my radiator out right now and so I'm wondering what items I should be either preventively replacing or testing, or whatever, while I have some room to work in the front of the engine. I already know about the vacuum pump issue. I suppose I should flush the radiator and straighten out any bent fins.

Any other ideas?

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1987 Mercedes 300D ~200K (Greasecar & Biodiesel)
1993 Ford F-250 7.3 IDI diesel 165K (Biodiesel)
1996 Thomas/International Bus with DT466 engine