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Originally Posted by nmucci
Starting it got a little harder over the past few months. I don't know when the last valve adjustment was done. However, once she is running, she runs great, and doesn't smoke.
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Since it runs great once it's running, you can forget about bad fuel filters or bad injectors.
Your problem is one of four possibilites, listed in order of the most likely culprit to the least (I'm eliminating the starter and the battery since they were recently replaced):
1) Failure of one or more glow plugs.
2) Valves that are seriously out of adjustment......allowing one or more valves to remain slightly open.
3) A timing chain that is very elongated resulting in very late valve and injection timing.
4) Low compression.