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Originally Posted by 87 300D owner
1. When I change the the large fuel filter on the 87 300D do I have to purge out the air? If so how do you do this?
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The OM603 IP is self-purging, be prepared to crank a bit. 30 seconds crank, let it rest a minute. Repeat...
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2. I want to fill the large filter with a diesel fuel purge/additive. Are there particular brands you recomend. It is ok to us what pepboys carrys? Are there certain products to stay away from that could cause damage?
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I have no preference. LubroMoly Diesel Purge seems popular.
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3. How do I remove the glow plugs to check their resistance? I have the factory manual but it is sometimes hard to navigate.
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Good news, you don't have to remove them! Find the relay, under hood, left front fender. Unsnap the protective top, unplug the 6-wire connector, measure each plug to ground.
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4. How long do glow plugs and injectors last. If one goes as a preventive measure should I replace the rest?
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There is no set GP 'life' that I have found. Several of us, myself included, will tell you "If it ain't broke, don't fix it" so we recommend replacing only parts that have tested as "bad." I replaced #4 and #6 GP last Fall, there rest are still OK...
Injectors can be rebuilt, there is a debate on quality of parts. If they aren't obviously bad, I'd say leave them alone for the time being...
Best Regards,
Jim