Changing the serpentine belt on a 603 is a 15minute job including cleaning up, try that on a 617, ... adjusting the valves is a non-existant job on the 603, ...
I think that the 603 is an excellent engine and if not abused, very reliable. I believe that I've read about two timing-cover failures here since I joined years ago, vacuum-pump failures of 61x and 60x engines are about the same, IP failures about the same, seldom see a bottom-end failure or oil-consumption issue either.
Get a good one and maintain it reasonably well.
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Gone to the dark side
- Jeff
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