How do you Prime the oil pump?? - Defender Source
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Old June 7th, 2009, 12:25 AM
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Russell Phillips
1994 Defender 90
Join Date: Feb 2004
Location: South Jordan, Utah
Posts: 81
How do you Prime the oil pump??

I replaced the oil cooler lines and I think that is what caused the pump to loose its prime. I know you can take it off and pack it with Vaseline, but I also heard that you could undo one bolt and pack that full of Vaseline. What would you recommend me do? I am attaching two pictures of the bolts that I think are the ones. Could someone please let me know which bolt it is or if I should just take the pump off and pack it with Vaseline?

Picture One

Picture Two

How do you take the pump off and pack it with Vaseline?

I did have the motor running for about 10-15 seconds with out oil. Do you think I did any damage to the motor?

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'94 AA Yellow
# 891
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Old June 7th, 2009, 09:56 AM
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David Short
1980 Stage One 109
Join Date: Jun 2006
Location: Sterling, VA
Posts: 1,003
I have a 3.5 V8. I took the oil pump and packed the gear area with vaseline. I then reassembled. I then took out the distributor and saw the top part of the oil pump.

I then took a long rod with a slot cut in it and attached one end to a drill and the other fitted over the top of the oil pump gear. A minute or so with the drill and the oil pump was primed.

I am not sure if the newer 3.9 V8s have the same configuration.
1980 Stage One 109
Sterling, VA
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Old June 8th, 2009, 09:47 AM
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Robert Dassler
1994 D90
D-90 Source Vendor
Join Date: Apr 2004
Location: Albuquerque, NM, USA
Posts: 994
If You take the pressure relief valve out you can force Lubriplate up into the gears and get the pump reprimed. You didn't hurt anything in 15 seconds.
Rob Dassler
SWR Automotive
505-872-7818 (shop)
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