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no oil pressure

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no oil pressure - 8/31/2008 9:53:28 AM

350sd

Posts: 21
Joined: 7/18/2007
Status: offline

I just did an engine swap. I transferred everything off of a 3.5L and put it on a 3.0L. Everything fit perfect, it started right up and purrs like a kitten. But I have no oil pressure. Because I completely drained EVERYTHING when I removed the engine do I need to prime the oil similar to fuel? Any thoughts?

Post #: 1

RE: no oil pressure - 8/31/2008 1:18:34 PM

ForcedInduction

Posts: 844
Joined: 5/20/2006
From: Federal Heights, Colorado
Status: online

Are you sure you connected the oil pressure sender? If there was no oil pressure the valve lifters would clatter after some time of running.

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1980 240D 3.0VNT 222K Miles. OM617.95, GT2256V VNT turbo, 4-speed manual, 3.46 diff, 15mm rear swaybar, ALDA removed, no EGR and Amsoil by-pass oil filter. Currently 107HP and 195lb/ft of torque at the wheels.

www.youtube.com/Turbo617

(in reply to 350sd)

Post #: 2

RE: no oil pressure - 8/31/2008 8:04:56 PM

350sd

Posts: 21
Joined: 7/18/2007
Status: offline

I will recheck the wires and track down the oil sender. Like I said it was purring. Obviously I didn''t run it long. Maybe a minute when I realized there was no oil pressure and it was telling the truth with the clacking valves. I immediately shut it down. It literally was not pumping any oil.

(in reply to ForcedInduction)

Post #: 3

RE: no oil pressure - 9/3/2008 11:27:02 AM

350sd

Posts: 21
Joined: 7/18/2007
Status: offline

I ask the question again. Has anyone heard of having to prime the oil pump? If so how do I got about doing this?
I put in the required amount of oil via the filler cap. But since the entire oil cooler and lines were drained I have now put another 3.785L via the oil filter container. I am still not getting any oil circulating.

(in reply to 350sd)

Post #: 4

RE: no oil pressure - 9/3/2008 2:56:18 PM

cycleboy

Posts: 131
Joined: 1/21/2008
Status: online

Priming an oil pump is essentially a standard procedure when rebuilding any engine. If the engine is drained, it''s also a good way to make sure there aren''t any air bubbles that would cause the pump to not work properly.

(in reply to 350sd)

Post #: 5

RE: no oil pressure - 9/3/2008 4:44:26 PM

350sd

Posts: 21
Joined: 7/18/2007
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Okay, any info on info on how to prime it?
It''s a ''87 6cyl. 3.0L in a ''92'' 300SD 140 body style. Reminds of that Johnny Cash song.

(in reply to cycleboy)

Post #: 6

RE: no oil pressure - 9/3/2008 6:16:21 PM

cycleboy

Posts: 131
Joined: 1/21/2008
Status: online

Sorry, but I don''t. On small block Chryslers there is a long rod that goes down to the pump that you turn with a power drill. I''ve never rebuilt a Benz engine so I don''t have the foggiest.

(in reply to 350sd)

Post #: 7

RE: no oil pressure - 9/3/2008 8:47:37 PM

350sd

Posts: 21
Joined: 7/18/2007
Status: offline

Okay, thanks cycleboy. I guess I''ll repost it "How do you prime an oil pump on a diesel?"

(in reply to cycleboy)

Post #: 8