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Old 04-04-2006, 12:34 AM
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bgkast bgkast is offline
Rollin' on 16s
Join Date: Dec 2005
Location: Vancouver WA
Posts: 6,528
The 2-5 psi electric pump should be used to supplement the stock pump, not to replace it. It is used to help the more viscous oil along the lines. A pump that puts out too much pressure can, I believe, fill the crankcase with oil if the diaphragm in the stock pump fails, however the car will continue to run due to the electric pump operating.

Personally I just used larger than stock lines on my oil side of the system and am just using the stock pump. I may add a low-pressure pump near the tank in the future, but so far I have had no problems.
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine
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