Priming Oil Pumps.
On some engines the oil-pump is mounted above the sump oil level and is not self-priming. If the pump and oil-galleries are empty of oil, either because of draining down or just after an engine rebuild, the pump may be unable to draw oil up unless it is `primed' first. At best, it would take a long time to do so. The manual may recommend packing the oil-pump with petroleum jelly, to give it something to "work on" but some recommend the `drill method':
From Riccy Smith (email@example.com), 10/'95, re Rover 3.5L V8:
Assemble the pump with a little engine oil, then finish assembling the engine. Leave the distributor out. When you're ready to fire the engine, stick your finger in #1 spark plug hole and spin the crank to firing position, TDC for #1. (check the harmonic)
- use at own risk, of course.
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