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Registered
Join Date: Feb 2005
Location: California
Posts: 724
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Priming the oil pump.
It seems to be common practice in the v8 world to pack
a newly rebuilt oil pump with vaseline (petroleum jelly) in order to prime it before the first start. Nobody mentions it here, is this something which just isn't necessary in our engines? andy |
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11-22-2010, 08:38 PM
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Moderator
Join Date: Dec 2001
Posts: 9,569
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Andy, I think the pump is below the oil level in the tank, so the inlet side of the pump ends up with a small head of pressure on it if the car is sitting level. From that perspective it's already primed.
Contrast that with the V8 situation where the oil sits below the pump and has to be picked up against the flow of gravity before the gears see any lubrication. 
__________________
'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
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11-23-2010, 07:24 AM
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