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The hydraulic lifters bled down.
an accumulator/accusump would be good.(may void warranty so ask first.)
I would make a note of this event and hope it is not repeated often.
If it occurs again, get the revs up to 2000rpm asap and hold them there for ten secs.
Third time in a month... take it to the dealer.
This should only happen on occasion.


Errm, You have checked the oil level, right?
m.
 

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Originally developed for race engines, accusumps are a container that may hold from one quart to 5 quarts depending on size.
The container is filled by normal oil pressure of a running engine.
It has an electrically energised pressure switch on it's valve to release oil into the sump of the car by the oil pump pick up at a user selected low oil pressure condition eg
1, engine trying to start.
2, oil moving away from oil pump pick up in a cornering situation. (Elise has extra baffles in the sump to combat this )
3, Oil is escaping from the engine.

The accusump has a hose that is plumbed to the oil pan or near the block skirt.
marketed by Canton/mecca.
m
 
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