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Old 03-07-2018, 09:21 AM
240Dee's Avatar
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Join Date: Sep 2017
Location: Cincinnati, OH
Posts: 186
Renewing W123 fuel system components

So I’ve got a few things I’d like to do outlined below, but a fundamental issue central to everything: should I really fix what isn’t obviously broken?

1) I snagged four rebuilt injectors from greazzer for my NA OM616, but I don’t have any strange noises, any smoke at all from my tailpipe, or any leaks at the injectors - should I swap out my injectors just for the hell of it given I have no idea if they’ve ever been serviced previously?? Here’s a link to video of a start up and the engine running: https://youtu.be/Xl4P3Fotzpc

2) if I do replace the injectors, I’m not going to bother with giving it a diesel purge this year, and I’d switch out both fuel filters when I put in the new injectors. Is this air bubble in the fuel filter line normal?

3) I’ve been told I should go ahead and replace my original hand primer pump with the updated Bosch pump, but if I’m doing injectors, fuel filters, AND the primer pump, what’s the best order to do those jobs in? I’d think primer pump first, filters second, injectors third, but am open to advice from folks who’ve done the work before!

Many thanks in advance for the help!


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